Top IoT Companies Securing Infrastructure in an Unstable World

As critical infrastructure and industries move toward ubiquitous connectivity, securing the Internet of Things (IoT) has never been more important. From manufacturing floors and energy grids to smart buildings and healthcare, operators face increasing threats and significant visibility gaps. Among the leading B2B IoT app development companies, one stands out for combining engineering-first IoT development with security-led design—see their IoT services and security primer here—positioning them at the forefront of enterprises working to strengthen connected systems.

Why IoT Security Matters Now

IoT attack surfaces are expanding with 5G rollouts, AI-enabled devices, and the convergence of IT and OT. Reports from leading OT/IoT vendors point to two consistent themes for 2025: defenders must close blind spots with continuous discovery and move from signature-only defenses to AI/behavioral detection. Effective IoT protection requires asset visibility, protocol-aware inspection, automated containment, and vulnerability prioritization.

1. Webbylab — Engineering-First IoT Security & Bespoke Systems

Webbylab, an experienced IoT mobile app development company, combines custom IoT engineering with embedded security practices, covering everything from PCB design to secure firmware deployment. Their development process is grounded in secure-by-design principles: encryption baked into device communications, secure boot to prevent malicious firmware injection, and continuous firmware update pipelines.

They also integrate IoT solutions with scalable cloud backends and edge computing frameworks, enabling real-time analytics and anomaly detection without sacrificing performance. This makes Webbylab especially attractive for startups and enterprises that want not only a functional IoT ecosystem but one with security woven in from the earliest design phase.

2. Armis — Extended Asset Visibility + SaaS OT/IoT Detection

Armis’s Centrix platform provides real-time visibility for all devices, managed or unmanaged, across IT, OT, IoT, and medical IoT (MIoT) environments. Using passive traffic monitoring, Armis discovers assets without disruption, maps relationships, and detects abnormal behaviors.

Its SaaS delivery model means enterprises can deploy quickly without heavy infrastructure investments. The platform also integrates with major SIEMs, SOAR tools, and NAC systems for faster remediation. In regulated industries like healthcare or finance, Armis stands out for its compliance-focused reporting and ability to segment devices to meet data protection mandates.

3. Nozomi Networks — Industrial Scale Asset Intelligence & AI Detection

Nozomi Networks is purpose-built for industrial and OT environments such as energy, transportation, and water treatment. Their Vantage platform and Guardian sensors enable deep packet inspection for industrial protocols (e.g., Modbus, DNP3, IEC 104) and leverage AI to detect subtle anomalies that might signal threats or misconfigurations.

A key differentiator is their global threat intelligence sharing — customers benefit from ongoing updates based on real-world ICS/OT attack data. Nozomi is well-regarded for scalability, supporting multi-site industrial deployments and delivering both cloud and on-premises options.

4. Claroty — XIoT Visibility and CPS Protection

Claroty specializes in protecting the Extended Internet of Things (XIoT) — a category that includes industrial OT, medical devices, and building management systems. Their Continuous Threat Detection (CTD) and Secure Remote Access (SRA) solutions provide asset inventories, real-time anomaly detection, and tightly controlled access for remote vendors.

They also excel at vulnerability management for cyber-physical systems (CPS), providing prioritized patch recommendations based on exploitation likelihood and operational impact. This makes Claroty particularly valuable in industries where downtime can cost millions — such as pharmaceuticals, manufacturing, and critical utilities.

5. Palo Alto Networks — Network + ML Device Classification

Palo Alto Networks integrates IoT security into its NGFW and Prisma Access platforms, using machine learning to identify device types, profiles, and expected behaviors. Policies can then be automatically applied to isolate suspicious devices or block malicious traffic.

This approach benefits organizations that want IoT protection without introducing a completely new security stack. For existing Palo Alto customers, it’s a logical upgrade — IoT threat prevention is delivered alongside traditional network, cloud, and endpoint security capabilities.

6. Cisco — Industrial Threat Defense at Scale

Cisco’s IoT security solutions, such as Cyber Vision and Industrial Network Director, integrate with its extensive networking portfolio to give IT and OT teams unified visibility. Network telemetry is analyzed for anomalies, and segmentation policies can be enforced directly at the switch or router level.

Cisco is especially strong in large-scale industrial environments where networking and security must be tightly integrated. Their solutions can protect everything from remote substations to smart city infrastructure while maintaining operational efficiency.

7. Fortinet — NAC + Automated Containment for IoT

Fortinet’s FortiNAC offers device profiling, network access control, and policy-based segmentation for IoT devices. When combined with the Fortinet Security Fabric, organizations can automatically quarantine compromised devices and apply threat intelligence across the environment.

This makes Fortinet ideal for campuses, healthcare facilities, and manufacturing floors where diverse IoT devices operate across multiple vendors and communication protocols. Their integration with FortiGate firewalls and FortiAnalyzer allows unified reporting and enforcement.

8. Tenable — Vulnerability Posture & OT/IoT Risk Scoring

Tenable extends its vulnerability scanning and risk scoring into the IoT/OT world through Tenable.ot. It profiles assets, detects insecure configurations, and assigns risk levels based on exploitability and business impact.

The platform integrates with patch management and ITSM tools, ensuring security teams can move from discovery to remediation quickly. Tenable is a strong fit for organizations prioritizing vulnerability management over pure threat detection, especially when IoT assets are part of a broader IT security program.

Comparison at a Glance

Company	Strength / Focus	Best for
Webbylab	Secure-by-design IoT engineering (custom HW/SW/firmware)	Bespoke IoT systems, product companies.
Armis	SaaS device visibility + runtime protection	Enterprises wanting broad unmanaged-device coverage.
Nozomi	OT/industrial anomaly detection	Utilities, ICS/SCADA environments.
Claroty	XIoT protocol coverage & CPS protection	Healthcare, building management systems.
Palo Alto	ML device classification + firewall integration	Network-integrated IoT security.
Cisco	Industrial Threat Defense & network-as-sensor	Large OT networks and telco/utility scale.
Fortinet	FortiNAC (NAC + automated containment)	NAC-driven, multi-vendor IoT governance.
Tenable	IoT vulnerability scoping & prioritization	Vulnerability management & remediation workflows.

Final Notes: Future Trends to Watch

Expect stronger convergence of XIoT telemetry into cloud SIEMs, more AI-driven anomaly detection tuned for OT, and higher demand for secure firmware supply-chain controls. Vendors that couple deep OT protocol knowledge with cloud scaling and automation will lead the next wave of resilience. For end-to-end engineering and integration that bakes security into IoT products from day one, Webbylab is a practical partner to consider.