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Digium Switchvox vs Kamailio SIP Server comparison

Digium and Kamailio are both solutions in the Unified Communications category. Digium is ranked #9, while Kamailio is ranked #5. Digium holds a 2.4% mindshare in UC, compared to Kamailio’s 10.1% mindshare. Additionally, 100% of Digium users are willing to recommend the solution, compared to 100% of Kamailio users who would recommend it.
Digium Switchvox
Read 2 Digium Switchvox reviews
  • 138 Views
  • 130 Comparison Views
100% willing to recommend
Kamailio SIP Server
Read 1 Kamailio SIP Server review
  • 421 Views
  • 383 Comparison Views
100% willing to recommend
 

Comparison Buyer's Guide

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Executive Summary
We performed a comparison between Digium Switchvox and Kamailio SIP Server based on real PeerSpot user reviews.

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To learn more, read our detailed Unified Communications Report (Updated: August 2025).
Buyer's Guide
Unified Communications
August 2025
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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Digium Switchvox
Ranking in Unified Communications
9th
Average Rating
9.0
Number of Reviews
2
Ranking in other categories
IP Telephony & Unified Communications (12th)
Kamailio SIP Server
Ranking in Unified Communications
5th
Average Rating
10.0
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Unified Communications category, the mindshare of Digium Switchvox is 2.4%, up from 1.2% compared to the previous year. The mindshare of Kamailio SIP Server is 10.1%, down from 10.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Communications Market Share Distribution
ProductMarket Share (%)
Kamailio SIP Server10.1%
Digium Switchvox2.4%
Other87.5%
Unified Communications
 

Featured Reviews

it_user489357 - PeerSpot reviewer
The Switchboard Redesign, Wall board in Switchboard, and Browser based video conferencing are extremely valuable.
Switchboard Redesign & Widget  Wall board in Switchboard Browser based video conferencing  Mobile App REST Interface  Call Center Management is easier now  Switchvox responsiveness has improve greatly  Our staff are very happy with the new Switchvox UI & UX of the Mobile App Experience with…
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it_user183567 - PeerSpot reviewer
​The server itself does load balancing however building a fail-over for it is difficult
The server itself does load balancing however the most difficult thing I found was building a fail-over for it. However, if you want to build a fail-over for it that's the tricky part since most sip traffic is routed using UDP. There are plenty of amazing TCP load balancers out there such as HAProxy but none for UDP. You need to use something like Keepalive and fail-over IP and restart the server on fail-over
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Comparisons

No data available
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Product Reports

Buyer's Guide
Unified Communications
August 2025
Digium Switchvox reportDownload Digium Switchvox product report
Buyer's Guide
Unified Communications
August 2025
Kamailio SIP Server reportDownload Kamailio SIP Server product report
 

Also Known As

Switchvox
No data available
 

Overview

VOIP phone systems
Digium
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.
Kamailio
 

Sample Customers

CORAF/Wecard
Asipto, Crocodile RCS Ltd, Edvina AB, Evariste Systems LLC, OpenXg Inc., Sipwise GmbH, VoIP Embedded
Buyer's Guide
Unified Communications
August 2025
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We monitor all Unified Communications reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.