Originally published at ictcontact.com
For most enterprises, customer experience is where deals are won or lost. Whether you run a call center, a BPO, or a support desk, you need communication that scales without breaking the budget. Proprietary contact center suites often come with steep licensing fees and little room to customize, which pushes many teams to look elsewhere.
That's where open source contact center platforms built on Asterisk-based contact center software earn their place. Asterisk is a leading open-source telephony framework, and it lets enterprises design, deploy, and run feature-rich contact centers without vendor lock-in. Below we compare the top open source Asterisk contact center options and where each one fits.
What Is an Asterisk Contact Center?
An Asterisk contact center is a customer interaction hub built on the Asterisk open-source telephony platform. Asterisk turns a standard server into a full communications system that handles:
Voice calls
IVR (Interactive Voice Response)
Automatic Call Distribution (ACD)
Call recording
Predictive and progressive dialing
VoIP and SIP integration
Because Asterisk is open source, you can shape the system to your exact requirements, which makes it a solid base for contact center deployments at scale.
Why Enterprises Choose Asterisk-Based Contact Center Software
1. Open Source Advantage
No costly licensing fees.
Freedom to customize for your business.
A large developer community behind it.
2. Scalability
Handles thousands of concurrent calls.
Deploys in multi-tenant environments.
Runs in the cloud or on-premises.
3. Advanced Features
Call routing, IVR, call recording, and real-time monitoring.
Predictive dialing and automated outbound campaigns.
CRM integration for better customer engagement.
4. Cost-Efficiency
Significant savings over proprietary platforms.
Lower operational and upgrade costs.
5. Enterprise-Grade Security
Secure SIP and TLS support.
Configurable firewalls, VPNs, and MFA integration.
Top Open Source Asterisk-Based Contact Center Software
1. ICTContact: Multi-Tenant Asterisk Contact Center Software
ICTContact is one of the most advanced open source Asterisk-based contact center platforms, built for enterprises, call centers, and telecom service providers. It goes past voice-only systems with true omnichannel communication, so teams manage every customer interaction from one interface.
Key Features of ICTContact
Multi-tenant support: host multiple organizations or clients on one system, each with full isolation, its own dashboard, and customizable features. Ideal for telecom operators and BPOs.
Omnichannel communication: reach customers on the channel they prefer, including inbound and outbound voice, SMS campaigns, email, WebRTC voice and agent chat, WhatsApp support, and group chat, all from a single dashboard.
Auto dialer: progressive dialing places calls one by one as agents free up, and preview dialing shows agents customer details before the call. These suit telemarketing, surveys, and proactive outreach.
Inbound call handling: Automatic Call Distribution (ACD), call queues with intelligent routing, skill-based routing to the right agent, plus call forwarding and voicemail.
IVR Studio: a drag-and-drop designer for building custom call flows and self-service menus without deep technical skill.
WebRTC support: agents connect from any WebRTC browser, with no physical phones or third-party softphones, which suits remote and distributed teams.
WhatsApp integration: handle real-time chats, send automated responses, and manage queries on one of the world's most used messaging platforms.
Group chat and collaboration: internal team chat lets agents and supervisors work together in real time.
REST APIs: integrate with CRMs (SuiteCRM, Salesforce, ICTCRM), ERP systems, and third-party workflow tools.
2. FreePBX Contact Center Add-Ons
FreePBX is another Asterisk-based open source PBX that you can extend with call center modules to act as a full contact center.
Call recording and live monitoring.
Call queues with advanced routing.
CRM integration with SuiteCRM, SugarCRM, and Salesforce.
Web-based agent dashboard.
Customizable IVRs.
It fits enterprises that already run FreePBX and want to add contact center features without switching platforms.
3. Issabel Contact Center
Issabel is a fork of the Elastix project and ships with an Asterisk contact center suite.
Pre-installed call center module.
Agent and supervisor dashboards.
Predictive dialing engine.
Real-time monitoring tools.
Call detail records (CDRs).
It suits teams that want a ready-to-deploy Asterisk contact center with minimal configuration.
4. GoAutoDial
GoAutoDial is a community-driven open source contact center built on Asterisk, aimed at outbound and inbound campaigns.
Predictive, progressive, and manual dialing.
Real-time agent monitoring.
Multi-campaign management.
Web-based agent and admin portals.
Call recording and reporting.
It appeals to enterprises that want a lightweight Asterisk contact center that's easy to use and community-supported.
5. Vicidial
Vicidial is one of the most popular open source Asterisk-based contact center platforms, used worldwide.
Inbound, outbound, and blended call handling.
Multiple dialing modes (predictive, power, manual).
Multi-language support.
Real-time monitoring and call barging.
Agent time and performance reports.
It's highly scalable and suits large enterprises managing thousands of agents.
6. WombatDialer (with Asterisk Integration)
WombatDialer isn't a standalone PBX but an outbound dialer that integrates with Asterisk.
High-performance outbound campaigns.
API-driven dialing.
Multi-tenant and distributed setups.
Flexible campaign scheduling.
It's a good fit for businesses that need advanced outbound campaign management on top of an existing Asterisk contact center.
How to Pick the Right One
Match the platform to how you work. If you want omnichannel and multi-tenant from one vendor, ICTContact covers the most ground. If you already run FreePBX, add-ons keep you on familiar ground. For raw outbound scale, Vicidial and GoAutoDial are proven. Weigh your call volume, the channels your customers actually use, and how much customization your team can support.
Frequently Asked Questions
What is open source contact center software?
It's contact center software whose source code is open, so you can self-host it, customize it, and avoid per-seat license fees. Platforms like ICTContact build on Asterisk to deliver routing, IVR, dialing, and omnichannel communication without vendor lock-in.
Is Asterisk good for an enterprise contact center?
Yes. Asterisk handles thousands of concurrent calls and runs in multi-tenant and cloud or on-premises setups. Platforms built on it, like ICTContact and Vicidial, are used by enterprises and telecom providers worldwide.
What makes ICTContact different from Vicidial?
Both are Asterisk-based and open source. ICTContact leans into omnichannel (voice, SMS, email, WebRTC, WhatsApp, and chat) and multi-tenant hosting from one dashboard, which suits service providers. Vicidial focuses on large-scale predictive dialing for big outbound operations.
Does open source contact center software support omnichannel?
Some do. ICTContact supports voice, SMS, email, WebRTC, WhatsApp, and group chat from a single agent interface, so customers can reach you on the channel they prefer.
Can I integrate a contact center with my CRM?
Yes. ICTContact offers REST APIs that connect to CRMs like SuiteCRM, Salesforce, and ICTCRM, plus ERP and workflow tools, so customer records and calls stay in sync.
Bottom Line
If you want a cost-effective, scalable, and customizable contact center, Asterisk-based open source software is worth serious consideration. With options like ICTContact, FreePBX, Issabel, GoAutoDial, Vicidial, and WombatDialer, you can build a contact center tailored to your needs, keep full control of your infrastructure, cut costs against proprietary systems, and scale with features like predictive dialing, IVR, and CRM integration. Smarter AI-assisted features are on the roadmap for ICTContact and coming soon, so plan around the omnichannel and dialing tools you can use today.
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