Alternatives to kamailio for all platforms with any license




Web / Online

Indie / Classic

Other Platforms

  • Asterisk icon


    Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP...

    Open Source Mac Windows Linux

  • FreeSWITCH icon


    FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication...

    Open Source Mac Windows Linux BSD

  • 3CX Phone System icon

    3CX Phone System

    3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such as Google Nexus, Sony Xperia...

    Freemium Windows Android iPhone

  • freepbx icon


    The FreePBX EcoSystem has developed over the past decade to be the most widely deployed Open Source PBX platform in use across the...

    Free Linux

  • FusionPBX icon


    FusionPBX is an open source FreeSWITCH GUI. FusionPBX can be used as a high available single or domain based multi-tenant PBX, carrier...

    Open Source Linux BSD

  • unxsVZ uSIPSwitch icon

    unxsVZ uSIPSwitch

    uSipSwitch a micro sip switch (sip proxy) perfect for edge SIP SBC work (e.g. hosted PBX business). Comes with web console and DNS...

    Open Source Linux

  • Flexisip icon


    SIP proxy server implementation compliant to RFC3261, written in C++11 started in 2011.

    Open Source Linux

  • Zent.IO icon


    Zent.IO is a Contact Center Cloud Software Multichannel that unify chat, phone and e-mail. All the communication channels will be...

    Commercial Web / Cloud

  • sipXecs

    A SIP based implementation of a PBX / unified communications system.

    Open Source Linux

  • Starfish PBX

    Starfish PBX aims to be an open source alternative to Digium’s Switchvox. The goal is to have a software equivalent to which we can...

    Open Source Linux

  • opensips icon


    OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server. OpenSIPS is more than a SIP proxy/router as it...

    Open Source Linux

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  • VoipSwitch icon


    VoipSwitch is a SoftSwitch System with routing and billing, with SIP protocol support (in older versions also H323). Basic package...

    Commercial Windows

  • Ozeki Phone Systems

    Ozeki Phone System XE is a Software PBX telephony platform for Windows. Ozeki enables your applications to connect PBX and access IVR...

    Commercial Windows

  • Mizutech VoIP Server icon

    Mizutech VoIP Server

    A robust SIP/H.323/WebRTC softswitch for Windows with a long list of features including PBX and billing.

    Free Windows

  • MiRTA PBX icon


    The most advanced interface for managing Asterisk PBX with Multitenant and Realtime capabilities

    Commercial Linux

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