Kamailio Alternatives

Kamailio is described as '® (successor of former OpenSER and SER) is an open source SIP server released under GPL, able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video); WebSocket support for' and is an app in the social & communications category. There are more than 10 alternatives to Kamailio for a variety of platforms, including Linux, Windows, Mac, Android and Self-Hosted apps. The best Kamailio alternative is Asterisk, which is both free and Open Source. Other great apps like Kamailio are FreePBX, 3CX, FreeSWITCH and FusionPBX.

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Kamailio alternatives are mainly Phone Systems but may also be Web Conferencing Tools. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Kamailio.

Kamailio

Free • Open Source

Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under GPL, able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication...

More about Kamailio

Kamailio alternatives page was last updated Oct 11, 2021

Asterisk
Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP gateway, IVR and ACD.
32 Asterisk alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
Asterisk Features
Low level
Voice Chat
SIP
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Asterisk VS Kamailio
Is Asterisk a good alternative to Kamailio?
- Asterisk is the most popular Windows, Mac & Linux alternative to Kamailio.
- Asterisk is the most popular Open Source & free alternative to Kamailio.
- Asterisk is Free and Open SourceKamailio is also Free and Open Source

FreePBX
FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server.
22 FreePBX alternatives
License model
- Free • Open Source
Platforms
- Linux
FreePBX Features
VoiP Calls
SIP
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FreePBX VS Kamailio
Is FreePBX a good alternative to Kamailio?

3CX
The 3CX Phone System is the software-based private branch exchange (PBX) Phone system based on the SIP (Session Initiation Protocol) standard and enables extensions to make calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services...
33 3CX alternatives
License model
- Freemium • Proprietary
Application types
- Phone System
- Web Conferencing Tool
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Microsoft Exchange Server
- Raspberry Pi
- Microsoft Office Suite
+2
3CX Features
1. Multiple languages
2. Remote Work
3. Integrated File Sharing
4. Integrated Chat
5. Live polling
6. Video Conferencing
7. Voice Chat
8. SIP
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3CX VS Kamailio
Is 3CX a good alternative to Kamailio?
- 3CX is the most popular Web-based, Android, iPhone, iPad, Android Tablet & Self-Hosted alternative to Kamailio.
- 3CX is Freemium and ProprietaryKamailio is Free and Open Source

FreeSWITCH
FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any other form of media. It was created in 2006 to fill the void left by proprietary commercial solutions.
23 FreeSWITCH alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- BSD
FreeSWITCH Features
Voice Chat
Support ZRTP
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FreeSWITCH VS Kamailio
Is FreeSWITCH a good alternative to Kamailio?

FusionPBX
FusionPBX is an open source FreeSWITCH GUI. FusionPBX can be used as a high available single or domain based multi-tenant PBX, carrier grade switch, call center server, fax server, voip server, voicemail server, conference server, voice application server, appliance framework...
11 FusionPBX alternatives
License model
- Free • Open Source
Platforms
- Linux
- BSD
FusionPBX Features
Graphical User Interface
Voice Chat
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FusionPBX VS Kamailio
Is FusionPBX a good alternative to Kamailio?

Yate - Yet Another Telephony Engine
Yate is a softswitch (concept of separating the network hardware from network software).
30 Yate - Yet Another Telephony Engine alternatives
License model
- Free • Open Source
Platforms
- Linux
Yate - Yet Another Telephony Engine Features
Voice Chat
SIP
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Yate - Yet Another Telephony Engine VS Kamailio
Is this a good alternative to Kamailio?

Elastix
More than a PBX, with Elastix you can communicate with your customers through voice, video and live chat from anywhere. Built-in video conferencing, website live chat and smartphone apps, ensure your agents remain productive through one unified mobile solution.
22 Elastix alternatives
License model
- Freemium • Proprietary
Platforms
- Linux
Elastix Features
Voice Chat
Show all NaN Elastix features ▾
Elastix VS Kamailio
Is Elastix a good alternative to Kamailio?

Wazo
Wazo is mainly an IPBX that provides communication services such audio, video, and instant messaging based on the use of standard network technologies such as the TCP/IP protocol. It is interoperable with most market telephony systems and gives users access to flexible and...
36 Wazo alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
Wazo Features
Extensible by Plugins/Extensions
Web-Based
SIP
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Wazo VS Kamailio
Is Wazo a good alternative to Kamailio?

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 health tools. Uses modern clustering NoSQL technology for advanced HA.
5 unxsVZ uSIPSwitch alternatives
License model
- Free • Open Source
Platforms
- Linux
unxsVZ uSIPSwitch Features
SIP
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unxsVZ uSIPSwitch VS Kamailio
Is unxsVZ uSIPSwitch a good alternative to Kamailio?

sipXecs
A SIP based implementation of a PBX / unified communications system.
14 sipXecs alternatives
License model
- Free • Open Source
Platforms
- Linux
sipXecs Features
SIP
Voice Chat
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sipXecs VS Kamailio
Is sipXecs a good alternative to Kamailio?

Flexisip
SIP proxy server implementation compliant to RFC3261, written in C++11 started in 2011.
4 Flexisip alternatives
License model
- Free • Open Source
Platforms
- Linux
Flexisip Features
SIP
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Flexisip VS Kamailio
Is Flexisip a good alternative to Kamailio?

VoipSwitch
VoipSwitch is a SoftSwitch System with routing and billing, with SIP protocol support (in older versions also H323).
20 VoipSwitch alternatives
License model
- Paid • Proprietary
Platforms
- Windows
VoipSwitch Features
1. Voice Chat
2. SIP
3. Video Conferencing
4. Call recording
5. IVR
Show all NaN VoipSwitch features ▾
VoipSwitch VS Kamailio
Is VoipSwitch a good alternative to Kamailio?
- VoipSwitch is the most popular commercial alternative to Kamailio.
- VoipSwitch is Paid and ProprietaryKamailio is Free and Open Source