FreeSWITCH - Developer-Grade Telecom Engine
For Voice, Video & Real-Time Communication
FreeSWITCH is a powerful, scalable open-source platform for building voice, video, and messaging applications. Used by telecom startups, SaaS platforms, and CPaaS providers worldwide. Build custom communication solutions with unmatched flexibility and performance.
Core Features
🔄 SIP Routing Engine
High-performance SIP proxy and B2BUA for call routing and manipulation
🌐 WebRTC Support
Native WebRTC gateway for browser-based calling and video conferencing
📹 Video Calls
HD video calling with multiple codec support including VP8, VP9, H.264
🎤 Conferencing
Multi-party audio/video conferences with recording and streaming
🤖 IVR Builder
Flexible IVR creation with speech recognition and TTS integration
⚙️ Custom Dialplan
Powerful XML dialplan for complete call flow customization
📊 Carrier-Grade Performance
Handle thousands of concurrent calls with minimal latency
🏢 Multi-Tenant
Build SaaS platforms with isolated tenant environments
Why Choose FreeSWITCH?
🚀 Unmatched Scalability
Scale from 10 to 10,000+ concurrent calls with horizontal clustering
🔧 Complete Flexibility
Build any communication solution with extensive API and module system
💻 Developer Friendly
Comprehensive documentation, active community, and ESL for easy integration
🌍 Protocol Support
SIP, WebRTC, H.323, RTMP, and 30+ audio/video codecs supported
💰 Cost Effective
Open source with no licensing fees, only infrastructure costs
🔐 Enterprise Security
TLS/SRTP encryption, secure WebRTC, and advanced authentication
Perfect For
📱 OTT Calling Apps
Build WhatsApp-like voice/video calling apps with WebRTC
☁️ CPaaS Providers
Launch communication APIs like Twilio or Vonage
📞 SIP Providers
Offer business VoIP services with advanced PBX features
🎮 Gaming Voice Chat
Low-latency voice communication for multiplayer games
📺 Live Streaming
Interactive live streams with audio/video mixing and recording
🏢 Enterprise PBX
Custom PBX solutions with advanced call routing and features
🎓 E-Learning Platforms
Virtual classrooms with video conferencing and recording
🏥 Telemedicine
HIPAA-compliant video consultations and call recording
FreeSWITCH vs Asterisk
| Feature | FreeSWITCH | Asterisk |
|---|---|---|
| Architecture | Multi-threaded, Modern | Single-threaded, Legacy |
| Performance | 5000+ calls/server | 500-1000 calls/server |
| WebRTC | Native, Built-in | Plugin Required |
| Video Support | Excellent (native) | Limited |
| Learning Curve | Moderate | Steep |
| Best For | SaaS, WebRTC, Video | Traditional PBX |
Technical Specifications
Key Modules & Capabilities
mod_sofia
SIP stack for signaling and call control
mod_verto
WebRTC endpoint for browser calling
mod_conference
Multi-party audio/video conferencing
mod_event_socket
External control via ESL protocol
mod_lua/python
Scripting for custom call logic
mod_av
Video transcoding and manipulation
Our FreeSWITCH Services
Installation
Get Started Fast
- Server setup & optimization
- Basic dialplan configuration
- SIP trunk integration
- Documentation package
- Email support (30 days)
Managed Hosting
Recommended
- High-performance infrastructure
- WebRTC gateway setup
- Load balancing & clustering
- 24/7 monitoring & support
- Regular backups & updates
- 99.9% uptime SLA
Custom Development
Full Service
- Custom module development
- API integration
- Dialplan programming
- Performance optimization
- Architecture consulting
- Dedicated engineer support
Integration Capabilities
🔗 REST APIs
Control calls, conferences, and system via HTTP/HTTPS APIs
📡 Event Socket
Real-time event streaming for external applications
💾 Database
Direct integration with PostgreSQL, MySQL, MongoDB
📨 Message Queue
RabbitMQ, Kafka integration for event processing
☁️ Cloud Services
AWS, Azure, GCP native deployment support
🎯 CDR Export
Call detail records to custom databases or APIs
Frequently Asked Questions
What are FreeSWITCH server requirements?
Minimum 4GB RAM, 4 CPU cores for 100-200 calls. For high-volume deployments (1000+ calls), use 16GB+ RAM with SSD storage and dedicated network interface.
Is FreeSWITCH better than Asterisk?
For modern applications requiring WebRTC, video, and high scalability, FreeSWITCH is superior. Asterisk is better for traditional PBX deployments with legacy hardware.
Can FreeSWITCH handle WebRTC?
Yes, FreeSWITCH has native WebRTC support through mod_verto and mod_sofia. No additional gateways or plugins required for browser-based calling.
How do I build a CPaaS platform with FreeSWITCH?
We provide complete CPaaS development services including multi-tenant architecture, API design, billing integration, and white-label customization.
What programming languages work with FreeSWITCH?
FreeSWITCH supports Lua, Python, JavaScript, Perl, and Java. ESL (Event Socket Library) works with any language for external control.
Do you provide FreeSWITCH training?
Yes, we offer developer training covering installation, dialplan programming, ESL integration, and advanced features. Available on-site or remote.
Build Your Communication Platform
Start building with FreeSWITCH today. Our experts will help you architect and deploy a scalable telecom solution.