Flexisip

Flexisip

Flexisip is an open-source SIP server for Linux that provides voice, video, and instant messaging features. It is designed to be lightweight, customizable, and scalable for deploying SIP infrastructure.
Social & Communications Voip Software
sip voip messaging linux
Flexisip alternatives ➤

Flexisip: Open-Source SIP Server for Linux

An open-source SIP server for Linux providing voice, video, and instant messaging features, designed to be lightweight, customizable, and scalable for deploying SIP infrastructure.

What is Flexisip?

Flexisip is an open-source Session Initiation Protocol (SIP) server software for Linux operating systems. It provides a robust and high-performance SIP infrastructure to enable real-time communication features such as voice over IP (VoIP) calling, video conferencing, instant messaging, and presence.

Some key features of Flexisip include:

  • Lightweight and optimized for enhanced performance using epoll and multithreaded design
  • Modular architecture allowing customization of features and integration with external components
  • Support for common audio/video codecs like G.711, G.729, H.264, VP8
  • Presence and instant messaging capabilities using SIMPLE protocol
  • Carrier-grade scalability to handle large number of concurrent calls and registrations
  • IPv4 and IPv6 support
  • TLS and SRTP support for secure media transmission
  • Database backends like MySQL, PostgreSQL, SQLite for persistent storage
  • WebRTC support for browser-based real-time communications

Flexisip can be used to deploy VoIP infrastructure for small businesses, enterprises, cloud telephony providers. Its high scalability makes it suitable for large platforms handling high traffic. The open-source nature provides flexibility to customize or enhance features as per specific requirements.

Flexisip Features

Features

  1. SIP registrar and proxy server
  2. Presence and instant messaging
  3. Audio/video calls
  4. NAT traversal
  5. Encryption via TLS and SRTP
  6. Customizable via Lua scripts
  7. Modular architecture
  8. Scalable for large deployments

Pricing

  • Open Source

Pros

Open source and free

Lightweight and fast

Very customizable and extensible

Good documentation

Active development community

Cons

Limited adoption so far

Steep learning curve

Not as feature rich as commercial options

Requires more technical expertise to setup and manage

Official Links

Official Website
https://flexisip.org

The Best Flexisip Alternatives

Top Social & Communications and Voip Software and other similar apps like Flexisip

Here are some alternatives to Flexisip:

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Asterisk
Yate - Yet Another Telephony Engine icon
Yate - Yet Another Telephony Engine
FreeSWITCH icon
FreeSWITCH
Kamailio icon
Kamailio
Suggest an alternative ❐

Asterisk icon

Asterisk

Asterisk is an open source communications application platform that enables developers and integrators to build communications solutions, including VoIP phone systems, call center solutions, video conferencing servers, and more. It offers a wide range of features and capabilities that allow organizations to replace traditional proprietary phone systems with customized solutions.Some...
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Yate - Yet Another Telephony Engine icon

Yate - Yet Another Telephony Engine

Yate is an open-source project that provides a modular telephony engine and server for voice over IP (VoIP) and traditional telephony applications. It can function as a softswitch, media gateway, call router, IVR server, or combination thereof for building custom communications solutions.Some key features of Yate include:Supports a variety of...
FreeSWITCH icon

FreeSWITCH

FreeSWITCH is an open source telephony platform and switching engine that enables the creation of voice, chat, and video applications, including PBX systems, voicemail services, conference calling, and contact center solutions. Released under the Mozilla Public License, FreeSWITCH is free to download, use, and modify.Some key features and capabilities of...
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Kamailio icon

Kamailio

Kamailio is an open source Session Initiation Protocol (SIP) server used for Voice over IP (VoIP) and real-time communications applications and services. It handles fundamental SIP protocol needs like call routing, policy enforcement, media handling, accounting, and authorization, with support for additional functions like presence, instant messaging, and more.Some key...
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