Quick Verdict
Semgrep and Checkmarx represent two fundamentally different approaches to application security testing. Semgrep is an open-source, lightweight, pattern-based SAST engine built for developers who want fast scans, easy custom rules, and zero-friction CI/CD integration. Checkmarx is a comprehensive enterprise AppSec platform that bundles SAST, DAST, SCA, API security, IaC scanning, and container security under centralized governance and deep compliance reporting. Both are leading SAST solutions in 2026, but they target different buyers, different workflows, and different organizational models.
If you need fast, developer-friendly SAST with custom rules: Choose Semgrep. Its YAML-based rule authoring is the best in the industry - any developer can write a new security rule in minutes, not weeks. Scans complete in seconds, the open-source CLI is free for commercial use, and the full AppSec Platform is free for up to 10 contributors. Semgrep fits naturally into DevSecOps workflows where developers own their security posture and need tools that stay out of their way.
If you need a comprehensive AppSec platform with DAST, compliance, and centralized governance: Choose Checkmarx. No other single vendor offers SAST, DAST, SCA, API security, IaC scanning, and container scanning in one unified platform. Checkmarx is built for organizations where a dedicated AppSec team manages security policy across hundreds of developers and dozens of applications, with deep compliance reporting mapped to PCI DSS, HIPAA, SOC 2, and NIST frameworks.
The real answer: The choice comes down to what kind of security program you are building. If security is developer-led and speed matters more than analysis depth, Semgrep is the better fit. If security is centrally managed by a dedicated team and you need DAST alongside SAST with enterprise governance, Checkmarx is the platform for that model. Some large enterprises run both - Semgrep for fast, developer-facing custom rule scanning and Checkmarx for deep analysis, DAST, and compliance reporting.
At-a-Glance Feature Comparison
| Category | Semgrep | Checkmarx |
|---|---|---|
| Primary focus | Lightweight SAST with custom rules | Enterprise AppSec platform |
| Core approach | Pattern-based analysis (YAML rules) | Deep data flow analysis (CxQL) |
| SAST | OSS engine + Pro cross-file analysis | CxSAST / Checkmarx One SAST (30+ languages) |
| DAST | No | Yes - Checkmarx DAST |
| SCA | Semgrep Supply Chain (reachability analysis) | Checkmarx SCA (vulnerability + license scanning) |
| API security | No | Yes - Checkmarx API Security |
| IaC scanning | Yes (Terraform, K8s, CloudFormation, Docker) | Yes - KICS (open-source) |
| Container scanning | No | Yes |
| Secrets detection | Yes - Semgrep Secrets (with validation) | Limited |
| Custom rules | YAML-based - writable in minutes | CxQL - powerful but steep learning curve |
| Scan speed | 10-30 seconds typical | 30 min to several hours (full scan) |
| AI features | Semgrep Assistant (AI triage, 20-40% noise reduction) | Checkmarx AI Guided Remediation |
| Open source | Yes - LGPL-2.1 (core engine) | No (except KICS for IaC) |
| Free tier | OSS CLI + full platform for 10 contributors | No free tier |
| Paid starting price | $35/contributor/month (Team) | Contact sales (enterprise-only) |
| Enterprise price | ~$21K-$42K/year (50-100 devs) | ~$59K-$120K+/year |
| Deployment | Cloud + self-hosted CLI | Cloud (Checkmarx One) or self-hosted (legacy CxSAST) |
| Compliance reporting | OWASP/CWE mapping in platform | Deep mapping (PCI DSS, HIPAA, SOC 2, NIST, OWASP, CWE) |
| IDE integration | VS Code (LSP-based) | VS Code, JetBrains, Eclipse, Visual Studio |
| Target buyer | DevSecOps engineers, security-minded developers | CISOs, AppSec teams, security directors |
| Languages supported | 30+ (modern + IaC) | 30+ (modern + enterprise/legacy) |
What Is Semgrep?
Semgrep is a lightweight, programmable static analysis engine created by Semgrep, Inc. (formerly Return To Corp). The name stands for "semantic grep" - it searches code like grep, but with an understanding of code structure and syntax rather than treating code as plain text. The core engine is open source under the LGPL-2.1 license, runs as a single binary with no external dependencies, and completes scans in seconds.
Semgrep's defining characteristic is its approach to rule authoring. Rules are written in YAML using patterns that mirror the target language's syntax. A rule to detect SQL injection in Python looks like the Python code it is matching, making rules readable and writable by any developer - not just security specialists. This accessibility is what sets Semgrep apart from traditional SAST tools like Checkmarx, where custom rules require mastering a proprietary query language.
The Semgrep Product Suite
Semgrep operates on three tiers that build on the open-source core:
Semgrep Community Edition (OSS) is the free, open-source engine. It provides single-file, single-function analysis with 2,800+ community-contributed rules across 30+ languages. The OSS engine runs anywhere - locally, in CI/CD, on air-gapped systems - with zero dependencies. Independent testing found that the Community Edition detects 44-48% of vulnerabilities in standardized test suites, which is impressive for a free tool but limited by its single-file scope.
Semgrep Pro Engine adds cross-file and cross-function data flow analysis. This traces tainted data from sources (user input, environment variables) to sinks (SQL queries, system commands) across entire codebases, including through function calls, class hierarchies, and module boundaries. The same independent testing found that the Pro engine detects 72-75% of vulnerabilities - a significant jump from the Community Edition. The Pro engine is available through the Semgrep AppSec Platform.
Semgrep AppSec Platform is the commercial product that wraps the engine with three product modules:
- Semgrep Code (SAST): 20,000+ Pro rules, cross-file analysis, managed dashboard, policy management, and CI/CD integrations
- Semgrep Supply Chain (SCA): Dependency scanning with reachability analysis that determines whether vulnerable code paths in your dependencies are actually called by your application
- Semgrep Secrets: Credential and secret detection with active validation - Semgrep tests whether an exposed API key or password is still active, which prioritizes findings that pose immediate risk
The platform also includes Semgrep Assistant, an AI-powered triage system that analyzes each finding, assesses exploitability, and reduces false positive noise by 20-40% out of the box. The Assistant Memories feature lets the system learn organization-specific context over time, progressively improving triage accuracy.
Semgrep's Strengths
Custom rule authoring is best-in-class. Semgrep's YAML rule syntax is the gold standard for static analysis. Rules use patterns that mirror the target language, support metavariables, taint tracking, and inter-procedural analysis - powerful enough for sophisticated security rules while remaining readable. When a security team discovers a new vulnerability pattern specific to their organization, a Semgrep rule can be written and deployed in under an hour. This speed of rule development is unmatched by any competing tool, including Checkmarx.
Scan speed enables per-PR security scanning. Semgrep scans a typical repository in 10-30 seconds. This speed means Semgrep can run on every pull request and every commit without becoming a pipeline bottleneck. Developers get security feedback in real time, not hours or days after code is written. For teams practicing continuous integration, this is the difference between security scanning being part of the natural workflow versus a separate gate that teams route around.
The open-source core provides genuine value at zero cost. The Semgrep CLI is free for commercial use. Organizations can run Semgrep in CI/CD pipelines on proprietary code, write unlimited custom rules, and use the 2,800+ community rules without paying anything. The full platform is also free for up to 10 contributors, giving small teams enterprise-grade security scanning at no cost.
Reachability analysis in Semgrep Supply Chain reduces SCA noise. Rather than flagging every CVE in your dependency tree, Semgrep Supply Chain traces whether the vulnerable function is actually called by your code. A vulnerability in a library function your code never invokes is still reportable, but it is not the same priority as one in a function you call on every request. This dramatically reduces the triage burden of SCA scanning compared to Checkmarx SCA.
Semgrep's Limitations
No DAST capabilities. Semgrep is a static analysis tool. It cannot test running applications for runtime vulnerabilities like authentication bypass, session fixation, server misconfiguration, or CORS issues. Teams that need DAST must add a separate tool.
No API security scanning. Semgrep does not offer dedicated API discovery or API security testing. As API-first architectures become the norm, this is an increasingly relevant gap.
Single-file analysis in the free tier limits detection. The Community Edition's single-file scope means it misses vulnerabilities that span multiple files. Cross-file data flow analysis requires the paid Pro engine, which limits the effectiveness of the free tier for complex codebases.
No container scanning. Unlike some competitors, Semgrep does not scan Docker images for vulnerabilities in base images or installed packages. Teams that need container security must add a separate tool.
Enterprise governance is lighter than Checkmarx. While the Semgrep AppSec Platform includes policy management and reporting, it does not match Checkmarx's depth of centralized governance, role-based access controls, or executive-level compliance dashboards.
What Is Checkmarx?
Checkmarx is an enterprise-grade application security platform founded in 2006 in Tel Aviv, Israel. The company pioneered commercial SAST technology and has since expanded into the most comprehensive single-vendor AppSec platform on the market, covering SAST, DAST, SCA, API security, IaC scanning (KICS), container security, and software supply chain security. Checkmarx was acquired by Hellman & Friedman in 2020 for approximately $1.15 billion and continues to invest heavily in its cloud-native Checkmarx One platform. The company is positioned as a Leader in the Gartner Magic Quadrant for Application Security Testing and serves over 1,800 enterprise customers worldwide.
Checkmarx's philosophy is that application security requires comprehensive coverage governed by centralized policies. The platform is built for organizations where a dedicated security team manages AppSec across the entire software portfolio - defining scanning requirements, triaging results, enforcing remediation SLAs, and reporting security posture to executive leadership. This enterprise-first approach stands in stark contrast to Semgrep's developer-first model.
The Checkmarx One Platform
Checkmarx One is the cloud-native unified platform that consolidates all Checkmarx scanning engines into a single dashboard. It provides correlated findings across all scan types, unified risk scoring, and centralized policy management.
Checkmarx SAST (CxSAST) is the flagship static analysis engine. It supports 30+ programming languages using a combination of deep data flow analysis, control flow analysis, and pattern matching. With nearly two decades of rule refinement, Checkmarx SAST has an enormous rule set covering both common and obscure vulnerability patterns. The custom query language, CxQL, allows security teams to write sophisticated queries that trace complex data flow paths through large codebases - though CxQL's power comes with a steep learning curve.
Checkmarx SCA scans open-source dependencies for known vulnerabilities, license compliance risks, and malicious packages. It supports all major package ecosystems and generates SBOMs in CycloneDX and SPDX formats. Checkmarx SCA includes supply chain security capabilities with reputation scoring for open-source packages.
Checkmarx DAST performs dynamic application security testing on running web applications and APIs. It discovers runtime vulnerabilities that static analysis cannot detect - authentication flaws, session management issues, server misconfiguration, insecure headers, and injection vulnerabilities that only manifest at runtime. This is a capability that Semgrep does not offer at all.
Checkmarx API Security discovers and tests APIs for security vulnerabilities, including shadow APIs that are undocumented and potentially exposed. As microservices architectures proliferate and APIs become the primary attack surface, this dedicated capability addresses a growing risk.
KICS (Keeping Infrastructure as Code Secure) is Checkmarx's open-source IaC scanner. Unlike the rest of the Checkmarx platform, KICS is fully open-source and can be used independently. It supports Terraform, CloudFormation, Kubernetes, Docker, Ansible, Helm, and other IaC formats.
Checkmarx's Strengths
Breadth of coverage is unmatched. No other single vendor offers SAST, DAST, SCA, API security, IaC scanning, container security, and supply chain security in one unified platform. Teams that need to check multiple compliance boxes can source everything from Checkmarx rather than assembling a multi-vendor stack. The unified dashboard correlates findings across scan types, so a vulnerability found in source code (SAST) can be validated against the running application (DAST) for confirmation.
Deep data flow analysis catches complex vulnerabilities. Checkmarx SAST performs deep inter-procedural and inter-file data flow analysis that traces complex vulnerability paths through large codebases. For enterprise applications with hundreds of thousands of lines of code, intricate call graphs, and framework-heavy architectures, this depth catches vulnerabilities that pattern-based tools like Semgrep's Community Edition may miss. The nearly two decades of rule refinement mean Checkmarx has seen and encoded patterns for a vast range of vulnerability types.
Enterprise governance and compliance are deeply mature. Checkmarx has been selling to enterprise security teams since 2006. The policy engine allows security teams to define scanning requirements, severity thresholds, and remediation SLAs per application, per team, or across the entire organization. Findings map to PCI DSS, HIPAA, SOC 2, OWASP Top 10, CWE Top 25, SANS Top 25, and NIST frameworks. Executive dashboards provide portfolio-level security posture views. For organizations in regulated industries where audit evidence is a regular requirement, Checkmarx generates exactly the reports auditors expect.
Broader language support for enterprise stacks. Checkmarx supports enterprise and legacy languages like COBOL, ABAP, PL/SQL, RPG, VB.NET, and Objective-C - languages that financial institutions, government agencies, and large enterprises still maintain. This coverage matters for organizations with diverse technology stacks spanning modern and legacy systems.
Checkmarx's Limitations
Scan times are significantly longer. Traditional Checkmarx SAST scans take 30 minutes to several hours for large codebases. While Checkmarx One has improved performance and incremental scanning reduces subsequent scan times, the initial full scan is substantially slower than Semgrep's seconds-to-minutes approach. This makes per-PR scanning impractical for fast-moving development workflows, pushing Checkmarx scans to nightly builds or release branches.
Custom rules require CxQL expertise. CxQL is powerful but has a steep learning curve. It is closer to a full programming language than Semgrep's YAML syntax, requiring security specialists who understand both the query language and Checkmarx's internal AST representation. Writing a new CxQL rule can take days or weeks compared to minutes for an equivalent Semgrep rule.
Higher false positive rates. Checkmarx SAST has historically been known for generating more false positives than newer tools. The deep analysis that makes Checkmarx thorough also generates more speculative findings that turn out to be false positives upon manual review. The Checkmarx One platform has improved this with machine learning-assisted validation, but most organizations still allocate dedicated security analyst time for result triage.
No free tier or self-service option. Checkmarx requires a sales conversation to get started. There is no free tier, no self-service trial, and no transparent pricing. This is a significant barrier for smaller teams, startups, and individual developers.
Developer experience lags behind Semgrep. Checkmarx was built for security teams, and the interface reflects this. It is powerful but complex, optimized for security analysts who need to triage hundreds of findings rather than developers who need to fix one vulnerability in their PR. The slower feedback loop and steeper learning curve reduce developer adoption compared to Semgrep's minimalist approach.
Feature-by-Feature Breakdown
SAST Analysis Depth
This is the core capability both tools share and where their different philosophies produce the most consequential differences.
Semgrep's SAST uses pattern matching with optional data flow analysis. The Community Edition matches code patterns within individual files using rules that mirror the target language's syntax. The Pro engine adds cross-file taint tracking that traces data from sources (user input) to sinks (SQL queries, system commands) across file and function boundaries. This layered approach lets teams start with fast, lightweight scanning and add deeper analysis as needed. The Pro engine detected 72-75% of vulnerabilities in independent testing - strong performance for a tool that completes scans in seconds.
Checkmarx's SAST uses deep data flow and control flow analysis. The engine builds a complete abstract syntax tree and performs inter-procedural analysis that traces complex vulnerability paths through large codebases. It handles aliasing, pointer analysis, reflection, and framework-specific conventions that simpler engines may miss. For very large codebases with intricate call graphs, Checkmarx's analysis depth can catch vulnerabilities that Semgrep's Pro engine does not - particularly second-order vulnerabilities where tainted data passes through multiple transformation layers before reaching a dangerous sink.
The practical tradeoff: Semgrep catches vulnerabilities faster and with less noise. Developers get results in their PR in seconds and can fix issues before merging. Checkmarx catches a broader range of vulnerabilities with deeper analysis, but the 30-minute-to-hours scan time means findings are typically reviewed by security analysts after code has merged. In an ideal security program, both approaches have value - but most teams must choose one, and the question is whether speed and developer adoption (Semgrep) or analysis depth and enterprise breadth (Checkmarx) matters more.
Custom Rules
This is the single most important differentiator between the two tools for many teams.
Semgrep rules are YAML-based and developer-accessible. Here is a taint-tracking rule that detects command injection via Flask request parameters:
rules:
- id: flask-command-injection
mode: taint
pattern-sources:
- patterns:
- pattern: flask.request.$ANYTHING
pattern-sinks:
- patterns:
- pattern: subprocess.call(...)
message: >
User input from flask.request flows to subprocess.call(),
creating a command injection vulnerability.
severity: ERROR
languages: [python]
Any Python developer can read and understand this rule. Writing it takes minutes. The YAML syntax supports metavariables, pattern operators (AND, OR, NOT), taint tracking, and inter-procedural analysis - powerful enough for sophisticated security rules while remaining accessible to non-security-specialists.
Checkmarx rules are written in CxQL. CxQL is a proprietary query language that operates on Checkmarx's internal code representation. It is powerful - you can write queries that trace complex data flow paths, handle aliasing, and follow framework-specific conventions. But CxQL has a steep learning curve. It requires understanding Checkmarx's AST representation, the query API, and data flow semantics. Writing a CxQL rule typically requires a trained security engineer and takes days to weeks, including testing and validation.
The practical impact is significant. When a security team discovers a new vulnerability pattern specific to their organization - say, an internal API that must always validate a specific header - a Semgrep rule can be written, tested in the online playground, and deployed to CI in under an hour. The equivalent CxQL rule might take days, and the team may need specialized Checkmarx consulting to get it right. For organizations that need to rapidly encode internal security policies, Semgrep's rule authoring speed is a decisive advantage.
Performance and Scan Speed
Semgrep completes typical repository scans in 10-30 seconds. The lightweight pattern-matching engine runs as a single binary, processes files in parallel, and requires no warm-up time. Diff-aware scanning analyzes only changed files, making incremental scans even faster. This speed makes it practical to run Semgrep on every commit, every PR, and in pre-commit hooks without impacting developer velocity.
Checkmarx SAST full scans take 30 minutes to several hours. The deep data flow analysis that makes Checkmarx thorough requires building complete code models and resolving complex call graphs, which takes time proportional to codebase size and complexity. Incremental scans on subsequent runs are faster, and Checkmarx One has improved performance compared to legacy CxSAST, but there is a fundamental tradeoff between analysis depth and scan speed.
How this affects usage patterns: Semgrep runs on every PR - developers see security findings inline with their code changes within seconds. Checkmarx typically runs on nightly builds or when code is merged to a release branch. This means Checkmarx catches vulnerabilities later in the development cycle, which increases the cost and effort of remediation. A vulnerability found in a PR before merge is cheap to fix. A vulnerability found in a nightly scan after merge requires context switching, investigation, and potentially reverting merged code.
A common pattern for teams using Checkmarx is tiered scanning: incremental SAST and SCA on every PR for faster feedback, full SAST scans nightly, and DAST scans on staging environments before release. This balances coverage with speed but still cannot match Semgrep's seconds-per-scan approach.
DAST: Checkmarx's Exclusive Capability
This is where Checkmarx has a capability Semgrep simply does not offer. Dynamic Application Security Testing scans running applications by sending crafted HTTP requests to discover vulnerabilities that static analysis cannot detect. Authentication bypass, session fixation, insecure cookie handling, CORS misconfiguration, server-side request forgery, and many injection vulnerabilities only manifest at runtime.
Checkmarx DAST integrates into the Checkmarx One platform and correlates dynamic findings with static findings from SAST and SCA. When Checkmarx DAST discovers a runtime vulnerability, it can be cross-referenced against the source code analysis to pinpoint the exact code location responsible. This correlation between static and dynamic findings is a significant advantage of a unified platform.
Semgrep has no DAST product. Teams using Semgrep that need dynamic testing must add a separate tool - OWASP ZAP (free, open-source), Burp Suite, Invicti, or another commercial DAST solution. This means managing a separate tool, separate dashboard, and separate findings that are not correlated with Semgrep's static analysis results.
Why this matters: Many enterprise security programs and compliance frameworks require both SAST and DAST. PCI DSS requires dynamic testing of web applications. NIST SP 800-53 recommends both static and dynamic analysis. Organizations that need to demonstrate compliance with these frameworks can check both boxes with Checkmarx alone, while Semgrep users need a separate DAST vendor.
Software Composition Analysis (SCA)
Semgrep Supply Chain includes reachability analysis. Rather than simply flagging every CVE in your dependency tree, Semgrep traces whether the vulnerable function in a dependency is actually called by your code. A vulnerability in library.dangerousFunction() that your code never calls is deprioritized compared to one in library.commonFunction() that you call on every request. This reachability analysis reduces SCA noise by 30-70% in typical projects, making findings genuinely actionable rather than overwhelming.
Checkmarx SCA provides solid dependency scanning without reachability. It scans all major package ecosystems for known vulnerabilities and license risks, generates SBOMs, and includes malicious package detection. Checkmarx SCA integrates with the Checkmarx One dashboard for unified risk scoring. However, without reachability analysis, every CVE in the dependency tree is flagged regardless of whether the vulnerable code is actually executed, leading to higher alert volumes and more triage effort.
The gap matters. Modern applications routinely have hundreds of open-source dependencies. An SCA tool without reachability analysis can produce dozens or hundreds of alerts, most of which are not actionable because the application never invokes the vulnerable code. Semgrep Supply Chain's reachability analysis provides a materially better signal-to-noise ratio for dependency vulnerability management.
Supply Chain Security
Semgrep Supply Chain combines SCA with reachability analysis and malicious package detection. It monitors your dependency tree continuously, alerts on new CVEs, and prioritizes findings based on whether the vulnerable code path is reachable from your application. Semgrep Secrets adds credential detection with active validation - testing whether exposed API keys or passwords are still active.
Checkmarx offers broader supply chain security capabilities. Beyond SCA, Checkmarx provides reputation scoring for open-source packages, identifies maintainer account takeover risks, and detects dependency confusion attacks. The Checkmarx supply chain security module integrates with SBOM generation and the broader Checkmarx One platform for unified risk visibility.
Both tools address the growing software supply chain threat, but through different lenses. Semgrep focuses on reachability-based prioritization and active secret validation. Checkmarx focuses on breadth of supply chain risk assessment across multiple attack vectors.
Language Support
Semgrep supports 30+ languages with particular strength in modern and cloud-native stacks. Java, JavaScript, TypeScript, Python, Go, Ruby, PHP, C, C++, Kotlin, Swift, Scala, Rust, and additional languages are well-covered. Semgrep also natively scans infrastructure-as-code formats - Terraform, CloudFormation, Kubernetes YAML, and Dockerfiles - which is outside the scope of traditional SAST tools. Framework-specific rules for Django, Flask, Express.js, Spring Boot, Rails, and others provide targeted vulnerability detection.
Checkmarx supports 30+ languages with broader coverage for enterprise and legacy stacks. In addition to all mainstream modern languages, Checkmarx scans COBOL, ABAP, PL/SQL, RPG, VB.NET, VBScript, Groovy, Perl, Objective-C, and other enterprise languages. This coverage matters for financial institutions and government agencies maintaining mainframe systems and legacy applications that need security scanning for compliance.
The practical difference: If your technology stack uses mainstream languages (Java, JavaScript/TypeScript, Python, Go, C#, Ruby), both tools provide excellent coverage. If your organization also maintains legacy systems in COBOL, ABAP, or PL/SQL, Checkmarx's broader language support becomes a decisive factor. If your stack heavily involves infrastructure-as-code, Semgrep's native IaC scanning is an advantage.
CI/CD Integration
Semgrep's CI/CD integration is lightweight and near-instant. Adding Semgrep to a pipeline takes one line:
- uses: semgrep/semgrep-action@v1
with:
config: p/default
No database, no server, no warm-up time. The CLI runs as a standalone binary, completes in seconds, and exits with standard error codes for pass/fail gating. Diff-aware scanning means only changed files are analyzed, keeping incremental scans fast regardless of total codebase size. Semgrep supports GitHub Actions, GitLab CI, Jenkins, CircleCI, Bitbucket Pipelines, Azure Pipelines, and any CI system that can execute a command-line tool.
Checkmarx's CI/CD integration is more comprehensive but heavier. The Checkmarx One CLI or plugin triggers scans that can include SAST, SCA, and optionally DAST and API security in a single pipeline step. The advantage is unified scanning with correlated results. The disadvantage is that the scan time overhead - particularly for SAST - can add significant time to the pipeline. Many teams configure tiered scanning: incremental SAST on PRs, full SAST on nightly builds, and DAST on staging environments.
The impact on developer experience is substantial. Semgrep's sub-minute scan times mean developers get security feedback while they are still thinking about the code they just wrote. Checkmarx's longer scan times mean feedback arrives hours later, requiring developers to context-switch back to code they have moved on from. This delay directly affects fix rates - vulnerabilities caught immediately are fixed immediately. Vulnerabilities reported the next morning often join a backlog that grows faster than it shrinks.
Pricing Comparison
Semgrep Pricing
| Tier | Price | What You Get |
|---|---|---|
| Community Edition (OSS) | Free | Open-source engine, 2,800+ community rules, single-file analysis, CLI and CI/CD |
| Team | $35/contributor/month (free for first 10 contributors) | Cross-file analysis, 20,000+ Pro rules, Semgrep Assistant (AI triage), Semgrep Supply Chain (SCA), Semgrep Secrets |
| Enterprise | Custom pricing | Everything in Team plus SSO/SAML, custom deployment, advanced reporting, dedicated support |
Checkmarx Pricing
| Plan | Price | What You Get |
|---|---|---|
| Checkmarx One | Contact sales | SAST, SCA, DAST, API security, IaC, container scanning |
| Legacy CxSAST | Contact sales | Self-hosted SAST-only deployment |
| KICS (IaC only) | Free (open-source) | IaC scanning for Terraform, CloudFormation, K8s, Docker, Ansible |
Checkmarx does not publish transparent pricing. Based on industry estimates, typical annual costs are:
| Team Size | Estimated Checkmarx Cost (Annual) |
|---|---|
| 25 developers | ~$35,000-$59,000 |
| 50 developers | ~$59,000-$85,000 |
| 100 developers | ~$85,000-$120,000+ |
| 200+ developers | Custom negotiation (volume discounts available) |
Side-by-Side Cost Analysis
| Team Size | Semgrep Team (Annual) | Checkmarx (Annual) | Notes |
|---|---|---|---|
| 5 developers | $0 (free for 10 contributors) | Not available (no SMB plan) | Semgrep wins by default |
| 10 developers | $0 (free for 10 contributors) | Not available | Semgrep is free; Checkmarx is inaccessible |
| 25 developers | ~$10,500 | ~$35,000-$59,000 | Semgrep is 3-6x cheaper, but Checkmarx includes DAST |
| 50 developers | ~$21,000 | ~$59,000-$85,000 | Semgrep is 3-4x cheaper; add DAST tool cost to compare fairly |
| 100 developers | ~$42,000 | ~$85,000-$120,000+ | Semgrep + separate DAST may approach Checkmarx total cost |
Key pricing observations:
Semgrep is dramatically cheaper at every team size - but the comparison is not apples to apples. Semgrep does not include DAST, API security, or container scanning. If you need those capabilities, adding separate tools narrows the pricing gap. A commercial DAST tool costs $15,000-$40,000/year, which brings the total Semgrep + DAST cost closer to Checkmarx territory for large teams.
Semgrep's free tier is genuinely valuable. The full platform - including cross-file analysis, AI triage, SCA, and secrets detection - is free for up to 10 contributors. This makes Semgrep essentially free for small teams and startups. Checkmarx has no equivalent on-ramp.
Checkmarx's total cost of ownership includes triage overhead. Higher false positive rates mean more security analyst time spent reviewing results. If a security engineer spends 10 hours per week triaging Checkmarx findings versus 3 hours per week triaging Semgrep findings, the labor cost difference over a year is substantial. This hidden cost rarely appears in vendor comparisons but is real.
Negotiation matters at enterprise scale. Checkmarx pricing is always negotiated. Semgrep Enterprise pricing is also custom-quoted. Both vendors will discount against each other during competitive evaluations.
For detailed pricing breakdowns, see our dedicated guides on Semgrep pricing and Checkmarx pricing.
Use Cases: When to Choose Each Tool
Choose Semgrep When
Your engineering team drives security decisions. If developers are expected to own the security of their code - scanning in their IDEs, reviewing security findings in PRs, and managing dependency upgrades - Semgrep is built for exactly this model. The developer experience is the product's core advantage.
You need custom rules quickly. If your organization has internal security policies, proprietary framework patterns, or novel vulnerability types that require custom rules, Semgrep's YAML-based authoring is the fastest path from "we identified a pattern" to "we are scanning for it in CI." Hours instead of weeks.
Fast CI/CD scans are non-negotiable. If your team has frequent merges and cannot tolerate multi-minute scan times, Semgrep's 10-30 second scans avoid creating a pipeline bottleneck. This is critical for teams practicing continuous deployment with multiple daily releases.
You want an open-source foundation. If your security strategy values open-source transparency, community-driven rule development, and the ability to inspect and customize the scanning engine, Semgrep's open-source core delivers this. Checkmarx is proprietary with no equivalent transparency.
You are a startup or small team. Semgrep's free tier for 10 contributors provides enterprise-grade SAST, SCA, and secrets scanning at zero cost. Self-service onboarding takes minutes. There is no equivalent Checkmarx option for teams under 25 developers.
Infrastructure-as-code security matters. If your team manages Terraform, Kubernetes, CloudFormation, or Dockerfiles and wants to catch misconfigurations alongside application code vulnerabilities, Semgrep's native IaC scanning covers this use case in the same tool and the same CI pipeline.
Choose Checkmarx When
A dedicated security team manages AppSec centrally. If your organization has a security team that defines scanning policies, triages results, manages vulnerability remediation tracking, and reports to the CISO, Checkmarx is built for this operating model. The governance, policy management, and executive dashboards support centralized security management at scale.
You need DAST as part of your security program. If your compliance framework or security standards require dynamic application testing alongside static analysis, Checkmarx provides both in a single platform. Using Semgrep for SAST and a separate vendor for DAST creates integration challenges and finding correlation gaps that Checkmarx's unified platform avoids.
Compliance is a primary driver. If your organization operates in a heavily regulated industry - financial services, healthcare, government, defense - where security audit evidence is regularly required, Checkmarx's deep compliance mapping, audit-ready reporting, and framework-specific dashboards reduce the effort required to demonstrate compliance.
Deep data flow analysis is required. If your codebases are large and complex with intricate call graphs, framework-heavy architectures, and legacy code that has accumulated over decades, Checkmarx's deep data flow analysis catches vulnerabilities that lighter-weight tools miss. For very large enterprise applications, analysis depth can matter more than scan speed.
You have a diverse technology stack including legacy languages. If your organization maintains COBOL, ABAP, PL/SQL, or other enterprise languages alongside modern stacks, Checkmarx's broader language coverage ensures consistent security scanning across the entire portfolio.
Self-hosted deployment is required. If data sovereignty requirements prohibit sending source code to any third-party cloud, Checkmarx offers self-hosted deployment. Semgrep's OSS CLI can run on-premises, but the full AppSec Platform with cross-file analysis is cloud-hosted.
You want a single-vendor AppSec platform. If your procurement strategy favors consolidating security tools under one vendor for simplified management, Checkmarx provides the broadest single-vendor coverage - SAST, DAST, SCA, API security, IaC, and container scanning.
Using Both Together
Some large enterprises run both Semgrep and Checkmarx. This is less redundant than it sounds. A typical dual-tool workflow uses Semgrep for fast, developer-facing SAST scanning in PRs with custom rules for organization-specific patterns, while Checkmarx handles deep SAST analysis on nightly builds, DAST scanning on staging environments, and centralized compliance reporting. This gives developers the fast feedback loop they need (Semgrep) alongside the comprehensive coverage and governance the security team requires (Checkmarx).
The drawbacks are increased cost, duplicate SAST findings that need deduplication, and the complexity of managing two platforms. For most organizations, choosing one tool and investing deeply in it delivers better results than spreading effort across both.
Alternatives to Consider
Before finalizing a decision between Semgrep and Checkmarx, evaluate these alternatives that may fit your specific needs better.
Snyk Code
Snyk Code is a developer-first security platform with strong SAST, industry-leading SCA, container scanning, and IaC security. Snyk is closer to Semgrep in philosophy (developer-friendly, fast scans) but offers broader product coverage including container scanning that Semgrep lacks. Snyk's SCA with reachability analysis is the market benchmark. Consider Snyk if you want a more comprehensive developer-focused platform than Semgrep but do not need Checkmarx-level enterprise governance. See our detailed Snyk vs Checkmarx comparison for the full analysis.
SonarQube
SonarQube is a code quality platform that includes security capabilities. It is not a direct competitor to either Semgrep or Checkmarx for dedicated security scanning, but it complements both tools by providing code quality gates, technical debt tracking, duplication detection, and coverage enforcement. Many teams use SonarQube for quality alongside Semgrep for security or alongside Checkmarx for quality metrics that Checkmarx does not cover. See our Semgrep vs SonarQube comparison for a detailed breakdown.
Veracode
Veracode is an enterprise AppSec platform that competes directly with Checkmarx. Like Checkmarx, Veracode offers SAST, DAST, and SCA in a unified platform. Veracode's differentiator is binary analysis (scanning compiled artifacts without source code access) and its developer security training program. Consider Veracode as an alternative to Checkmarx if you need binary analysis or prefer Veracode's training-oriented approach. See our Checkmarx vs Veracode comparison for details.
For broader exploration, see our guides to Semgrep alternatives, Checkmarx alternatives, and the best SAST tools in 2026.
Head-to-Head on Specific Scenarios
| Scenario | Better Choice | Why |
|---|---|---|
| Developer fixing a vulnerability in a PR | Semgrep | Scan completes in seconds with inline findings |
| Security team auditing 50 applications | Checkmarx | Portfolio dashboards and centralized policy management |
| Writing a custom rule for an internal API | Semgrep | YAML rule written and deployed in under an hour |
| PCI DSS compliance evidence | Checkmarx | Deeper compliance framework mapping and audit reports |
| Scanning a running web application | Checkmarx | DAST capability that Semgrep does not have |
| Startup with 5 developers | Semgrep | Free tier with full platform access |
| Enterprise with 500 developers and CISO oversight | Checkmarx | Enterprise governance and executive dashboards |
| Detecting command injection in Python | Semgrep | Taint-tracking rule writable in minutes |
| Legacy COBOL codebase scanning | Checkmarx | Broader enterprise language coverage |
| IaC misconfiguration detection | Semgrep | Native Terraform, K8s, CloudFormation scanning |
| API security testing | Checkmarx | Dedicated API security product |
| Minimizing false positives | Semgrep | AI-powered triage reduces noise by 20-40% |
| Dependency scanning with noise reduction | Semgrep | Reachability analysis in Semgrep Supply Chain |
| Self-hosted / air-gapped deployment | Checkmarx | Full platform available on-premises |
| Fastest time-to-first-scan | Semgrep | Minutes to first scan; Checkmarx requires sales + onboarding |
| Correlating SAST and DAST findings | Checkmarx | Unified platform correlates static and dynamic results |
Final Recommendation
Semgrep and Checkmarx occupy opposite ends of the SAST spectrum in 2026. Semgrep is the lightweight, developer-friendly, open-source option that prioritizes speed, custom rules, and low friction. Checkmarx is the heavyweight, enterprise-grade, comprehensive option that prioritizes depth, breadth, compliance, and centralized governance. The right choice depends on your organizational model, compliance requirements, and budget.
For developer-led security programs and DevSecOps teams: Choose Semgrep. The open-source core gets you started at zero cost. The YAML-based rule authoring lets you encode internal security policies in minutes. The 10-30 second scan times mean security feedback arrives while developers are still thinking about the code. The full platform is free for teams of 10 or fewer. If you later need DAST, add it as a separate tool or evaluate adding Checkmarx specifically for dynamic testing.
For security-team-led programs at enterprise scale: Evaluate Checkmarx One. The unified SAST/DAST/SCA/API security platform eliminates multi-vendor complexity. The deep data flow analysis catches complex vulnerabilities that lighter tools miss. The enterprise governance, policy management, and compliance reporting give CISOs the visibility and control they need. If developer adoption is a concern, consider supplementing with Semgrep for fast PR-level scanning.
For compliance-driven organizations in regulated industries: Start with Checkmarx. The compliance mapping, audit-ready reporting, DAST coverage, and centralized governance align with regulatory requirements. The cost is justified by the effort saved in audit preparation and the risk reduction from comprehensive scanning.
For startups, small teams, and budget-conscious organizations: Start with Semgrep. The free tier provides genuine, production-grade security scanning. The self-service onboarding takes minutes. When you reach a scale where enterprise governance, DAST, or deep compliance reporting becomes necessary, you can evaluate whether to add Checkmarx or supplement Semgrep with specialized tools.
For teams that already have one tool and are evaluating the other: Before switching, consider whether the tools might be complementary. Semgrep for fast, developer-facing custom rules in CI, plus Checkmarx for deep analysis, DAST, and compliance reporting, is a pattern that works well for organizations large enough to justify both investments. If you must choose one, pick the tool that aligns with who owns security at your organization - developers (Semgrep) or a dedicated security team (Checkmarx).
The most important factor is adoption. A lightweight tool that developers actually use every day catches and fixes more vulnerabilities than a comprehensive platform that sits underutilized because it is too slow or too complex for the people writing the code. Choose the tool your team will actually use, and invest in making that adoption successful.
Frequently Asked Questions
Is Semgrep better than Checkmarx for SAST?
Semgrep is better for teams that need fast, developer-friendly SAST with easy custom rule authoring. Scans complete in seconds, YAML rules can be written in minutes, and the open-source engine is free for commercial use. Checkmarx is better for teams that need deep data flow analysis across large codebases, broader language coverage for enterprise and legacy languages, and centralized governance managed by a dedicated security team. Semgrep optimizes for speed and developer adoption. Checkmarx optimizes for analysis depth and enterprise compliance. Neither is universally better - the right choice depends on your team structure, compliance requirements, and whether speed or depth matters more.
Can Semgrep replace Checkmarx?
Semgrep can partially replace Checkmarx for SAST scanning, especially for teams that prioritize speed and custom rules. However, Semgrep cannot replace Checkmarx's DAST capabilities, API security scanning, or deep enterprise governance features. Checkmarx's data flow analysis is also deeper for large, complex codebases where taint analysis must trace paths across hundreds of files. Teams migrating from Checkmarx to Semgrep typically need to add a separate DAST tool and may lose some compliance reporting granularity. For pure SAST replacement, Semgrep is a strong option. For full AppSec platform replacement, Semgrep alone is insufficient.
How much does Semgrep cost compared to Checkmarx?
Semgrep's open-source CLI is free for commercial use. The Semgrep AppSec Platform is free for up to 10 contributors, then costs $35 per contributor per month for the Team tier. Checkmarx does not publish pricing and requires a sales conversation. Industry estimates place Checkmarx at $59,000 to $120,000+ per year for teams of 50-100 developers. For a 50-developer team, Semgrep Team costs approximately $21,000 per year while Checkmarx costs $59,000-$85,000 per year. However, Checkmarx includes DAST, API security, and broader scanning capabilities in that price, while Semgrep covers only SAST, SCA, and secrets scanning.
Does Semgrep have DAST like Checkmarx?
No, Semgrep does not offer DAST (Dynamic Application Security Testing). Semgrep is a static analysis tool that scans source code without executing it. Checkmarx offers DAST through Checkmarx DAST, which tests running web applications and APIs for runtime vulnerabilities like authentication bypass, session management flaws, and server misconfiguration. If your security program requires DAST - and most enterprise compliance frameworks do - you will need a separate tool alongside Semgrep, such as OWASP ZAP, Burp Suite, or a commercial DAST product.
Which tool has better custom rule support - Semgrep or Checkmarx?
Semgrep has significantly better custom rule authoring for most teams. Semgrep rules are written in YAML using patterns that mirror the target language's syntax, making them readable and writable by any developer in minutes. Checkmarx uses CxQL (Checkmarx Query Language), which is powerful and supports deep data flow queries but has a steep learning curve. CxQL is closer to a full programming language and typically requires security specialists to write and maintain. If your team needs to quickly encode internal security policies or detect custom vulnerability patterns, Semgrep's rule authoring is dramatically faster and more accessible.
How fast is Semgrep compared to Checkmarx SAST?
Semgrep is dramatically faster than Checkmarx SAST. Semgrep completes typical repository scans in 10 to 30 seconds using its lightweight pattern-matching engine. Checkmarx SAST full scans take 30 minutes to several hours depending on codebase size and complexity, though incremental scans are faster. This speed difference fundamentally affects how the tools are used in practice. Semgrep can run on every pull request and every commit without creating pipeline bottlenecks. Checkmarx is typically run on nightly builds or release branches because the scan time makes per-PR scanning impractical for fast-moving teams.
Can I use Semgrep and Checkmarx together?
Yes, and some organizations do run both tools. Semgrep handles fast, developer-facing SAST scanning in pull requests with custom rules for organization-specific patterns. Checkmarx handles deep SAST analysis on nightly builds, DAST scanning on staging environments, and centralized compliance reporting for audits. This dual-tool approach provides the best developer experience (Semgrep) alongside the broadest security coverage (Checkmarx). The main drawback is increased cost and the need to manage overlapping SAST findings from two different engines.
Which tool supports more programming languages?
Both Semgrep and Checkmarx support 30+ programming languages, but Checkmarx has broader coverage for enterprise and legacy languages. Checkmarx supports COBOL, ABAP, PL/SQL, RPG, VB.NET, and other enterprise languages that many financial institutions and government agencies still maintain. Semgrep covers all mainstream modern languages including Java, JavaScript, TypeScript, Python, Go, Ruby, PHP, C, C++, Kotlin, Swift, Scala, and Rust, with particularly strong coverage for cloud-native and infrastructure-as-code languages like Terraform and Kubernetes YAML. For most modern technology stacks, both tools provide equivalent language coverage.
Is Semgrep open source?
Yes, Semgrep's core engine (Community Edition) is open source under the LGPL-2.1 license. You can use it commercially, run it in CI/CD pipelines on proprietary code, and write custom rules at no cost. The open-source edition provides single-file analysis with 2,800+ community rules across 30+ languages. The commercial Semgrep AppSec Platform adds cross-file data flow analysis, 20,000+ Pro rules, AI-powered triage, SCA with reachability analysis, and secrets detection. Checkmarx is fully proprietary with no open-source component, except for KICS (Keeping Infrastructure as Code Secure), its open-source IaC scanner.
Which is better for compliance - Semgrep or Checkmarx?
Checkmarx is generally better for compliance-driven organizations. It provides deep compliance reporting mapped to PCI DSS, HIPAA, SOC 2, OWASP Top 10, CWE Top 25, SANS Top 25, and NIST frameworks. Checkmarx also offers DAST, which many compliance frameworks require alongside SAST. The centralized policy management and role-based access controls support enterprise compliance workflows with multiple stakeholders. Semgrep maps findings to OWASP and CWE categories and provides compliance views in the AppSec Platform, but the reporting is not as granular or audit-ready as Checkmarx's offerings for heavily regulated industries.
What is the false positive rate for Semgrep vs Checkmarx?
Semgrep generally produces fewer false positives than Checkmarx SAST. Semgrep's pattern-matching approach generates findings with high confidence, and Semgrep Assistant (AI triage) further reduces noise by 20-40% by assessing exploitability and filtering known false positive patterns. Checkmarx SAST has historically been known for higher false positive rates due to its aggressive deep analysis, though the Checkmarx One platform has improved this with machine learning-assisted result validation. Higher false positive rates require dedicated security analyst time for triage, increasing the effective cost of operating Checkmarx.
Which tool is better for startups and small teams?
Semgrep is almost always better for startups and small teams. The open-source CLI is free for commercial use. The full Semgrep AppSec Platform including cross-file analysis, AI triage, SCA, and secrets detection is free for up to 10 contributors. Self-service onboarding takes minutes. Checkmarx has no free tier, no self-service option, and requires a sales conversation and enterprise-level budget to get started. Unless a startup is in a heavily regulated industry requiring Checkmarx-specific compliance reporting from day one, Semgrep provides better value, faster time-to-security, and lower cost for small teams.
Does Checkmarx have SCA like Semgrep Supply Chain?
Yes, Checkmarx offers SCA through Checkmarx SCA, which scans open-source dependencies for known vulnerabilities, license compliance risks, and malicious packages. It generates SBOMs in CycloneDX and SPDX formats. However, Semgrep Supply Chain includes reachability analysis that determines whether the vulnerable function in a dependency is actually called by your code, which dramatically reduces noise. Checkmarx SCA flags all CVEs in the dependency tree regardless of whether vulnerable code paths are invoked, leading to higher alert volumes. For actionable dependency scanning, Semgrep Supply Chain's reachability analysis provides a better signal-to-noise ratio.
Originally published at aicodereview.cc
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