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Kamailio SIP Server Reviews

Vendor: Kamailio
5.0 out of 5
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What is Kamailio SIP Server?

Kamailio is an Open Source SIP Server released under GPL, able to handle thousands of call setups per second. Kamailio can be used to build large platforms for VoIP and realtime communications Ð presence, WebRTC, Instant messaging and other applications. It can also easily be applied to scaling up SIP-to-PSTN gateways, PBX systems or media servers like Asterisk, FreeSWITCH or SEMS.
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Kamailio SIP Server is the #5 ranked solution in top Unified Communications solutions. PeerSpot users give Kamailio SIP Server an average rating of 10.0 out of 10. Kamailio SIP Server is most commonly compared to 3CX Live Chat: Kamailio SIP Server vs 3CX Live Chat.
Buyer's Guide
Unified Communications
March 2026
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Helped 884,873 peers since 2012

Kamailio SIP Server mindshare

As of March 2026, the mindshare of Kamailio SIP Server in the Unified Communications category stands at 6.3%, down from 9.8% compared to the previous year, according to calculations based on PeerSpot user engagement data.
Unified Communications Mindshare Distribution
ProductMindshare (%)
Kamailio SIP Server6.3%
Cisco Unified Communications10.2%
3CX Live Chat7.7%
Other75.8%
Unified Communications
 
 
Key learnings from peers
Last updated Mar 25, 2026

Valuable Features

  • "This product can scale insanely, the fact that it can handle hundreds of thousands of subscribers is great and means you won't have to worry about scalability for a very long time."

Room for Improvement

  • "Would be nice to have more sample config files for different kinds of scenarios rather then just one default config file."
These insights are based on the in-depth reviews provided by peers to help you make a better buying decision.
Download our Unified Communications Buyer's Guide for additional reliable information.

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Kamailio SIP Server customers

Asipto, Crocodile RCS Ltd, Edvina AB, Evariste Systems LLC, OpenXg Inc., Sipwise GmbH, VoIP Embedded

Related questions

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Kamailio SIP Server Reviews Summary
Author infoRatingReview Summary
PHP Dev & Telecoms Engineer at a marketing services firm with 51-200 employees5.0I find this product excellent for SIP load balancing and scalability, supporting hundreds of thousands of subscribers reliably. Initial setup and UDP fail-over are tricky, but its open-source nature and community make it a superior solution.