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Cisco Unified Communications vs Kamailio SIP Server comparison

 

Comparison Buyer's Guide

Executive Summary

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

Cisco Unified Communications
Ranking in Unified Communications
1st
Average Rating
8.4
Number of Reviews
9
Ranking in other categories
IP Telephony & Unified Communications (1st)
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 March 2026, in the Unified Communications category, the mindshare of Cisco Unified Communications is 10.2%, down from 15.6% compared to the previous year. The mindshare of Kamailio SIP Server is 6.3%, down from 9.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Unified Communications Mindshare Distribution
ProductMindshare (%)
Cisco Unified Communications10.2%
Kamailio SIP Server6.3%
Other83.5%
Unified Communications
 

Featured Reviews

reviewer1194252 - PeerSpot reviewer
Head of Sales & Solution Sales - MEA at a tech vendor with 10,001+ employees
Has supported collaboration across distributed teams and continues to deliver reliable communication features
Currently, all future propositions for UC are not Cisco-based. Easy integration with Microsoft Windows would be beneficial. It integrates with SharePoint and Outlook, which was not available at one point in Cisco Webex. Regarding improvements, the focus should be on how cloud-friendly Cisco Unified Communications products are and how technically and commercially simple they are compared to competitors such as Genesys. All features are present. The concerns lie in the ease of using features, pricing, and whether it is available directly on the cloud or requires going through a Cisco channel partner. Features themselves are not an issue, and Cisco can develop new ones quickly if needed. If current customers are using Cisco Unified Communications and enjoying its features with devices that are not end of life or end of sale, they will continue using it. However, when moving to the cloud, comparisons become necessary. The simplicity, customer journey, transformation journey, and architecture complexity define whether Cisco Unified Communications is the right product or if third-party solutions are more suitable.
it_user183567 - PeerSpot reviewer
PHP Dev & Telecoms Engineer at a marketing services firm with 51-200 employees
​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

Quotes from Members

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

Pros

"Having a single system including the routers and switches all from the same system gives ease of use."
"Cisco supports third-party gadgets, including workforce management systems."
"The best feature I would say about Cisco Unified Communications is the Telepresence."
"The Click to dial feature was one of the most important features for the customer."
"I have work on Cisco Unified Communication Manager (Call Manager) for one and a half years and it is a remarkable device which provides fully integrated communications, converging voice, video, and data over a single network infrastructure using standard protocols."
"Using the Communication Manager, it gave us the possibility to move around the office, and even outside the office, keeping our phone number always accessible using Jabber."
"Technical Support: Cisco TAC is the very best support I have seen from any company I have ever had to work with."
"We use Extension Mobility and Jabber a lot with mobile remote access. In addition to video calls with Jabber, this greatly enriched communications between coworkers."
"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."
 

Cons

"Licensing can be an unbelievable mess."
"Some features take a lot of steps to configure, so having areas where a few clicks can configure a feature for a user would be nice."
"Some features take a lot of steps to configure, so having areas where a few clicks can configure a feature for a user would be nice."
"An improvement option could be to incorporate the Voicea solution with Communication Manager, allowing it to make a translation between different languages automatically in a conversation."
"To have 2 call management server configured as failover would be expensive."
"Sometimes, minor temporary issues can arise while updating the servers."
"An improvement option could be to incorporate the Voicea solution with Communication Manager, allowing it to make a translation between different languages automatically in a conversation."
"One of the major flaws in the unified CM is handling the configuration of the Voice mail port."
"Would be nice to have more sample config files for different kinds of scenarios rather then just one default config file."
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Top Industries

By visitors reading reviews
Manufacturing Company
15%
Government
12%
Educational Organization
11%
Computer Software Company
9%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise3
No data available
 

Questions from the Community

What needs improvement with Cisco Unified Communications?
I want to see improvements, especially for the GUI interface, as it should be much easier and user-friendly in Cisco Unified Communications. It would be beneficial if it could be more web interface...
What is your primary use case for Cisco Unified Communications?
We use this only for communication purposes, which includes a few use cases for it. We haven't used the video calls and other features because we based our use on basic communication, so I cannot g...
What is your experience regarding pricing and costs for Cisco Unified Communications?
Regarding price and value, it is already expired and has reached end of life.
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Overview

 

Sample Customers

Afni, Allied Irish Banks, Bellevue, Came Group, Children's Hospital Colorado, Erickson Living, IDEALondon, Instituto Zaldivar, John Lewis, Linz AG, London Hydro, Lone Star College System, Lone Star College System, Mondi Group, North West Redwater, Park Nicollet, Pentana Solutions Australia, Pilatus, Pirelli, Portugal Ministry, Presidio Inc., Republic Bank & Trust Company, Saipem, SickKids Foundation, Top Right Group, Vital Images
Asipto, Crocodile RCS Ltd, Edvina AB, Evariste Systems LLC, OpenXg Inc., Sipwise GmbH, VoIP Embedded
Find out what your peers are saying about Cisco, 3CX, Digium and others in Unified Communications. Updated: March 2026.
884,933 professionals have used our research since 2012.