Avaya Spaces vs Kamailio SIP Server comparison

The compared Avaya and Kamailio solutions aren't in the same category. Avaya is ranked #16 in ESS , with an average rating of 7.5, and holds a 1.3% mindshare in the category. Kamailio is ranked #5 in UC , and holds a 10.1% mindshare. Additionally, 50% of Avaya users are willing to recommend the solution, compared to 100% of Kamailio users who would recommend it.

Avaya Spaces

Read 3 Avaya Spaces reviews

261 Views
128 Comparison Views

50% willing to recommend

Kamailio SIP Server

Read 1 Kamailio SIP Server review

421 Views
383 Comparison Views

100% willing to recommend

Avaya Spaces

Kamailio SIP Server

Comparison Buyer's Guide

Download the report

Executive Summary

We performed a comparison between Avaya Spaces and Kamailio SIP Server based on real PeerSpot user reviews.

Find out what your peers are saying about Microsoft, Slack, Atlassian and others in Enterprise Social Software.

To learn more, read our detailed Enterprise Social Software Report (Updated: August 2025).

Buyer's Guide

Enterprise Social Software

August 2025

Download the complete report

Helped 867,676 peers since 2012

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

Avaya Spaces

Average Rating

7.6

Reviews Sentiment

7.4

Number of Reviews

Ranking in other categories

Enterprise Social Software (16th)

Kamailio SIP Server

Average Rating

10.0

Number of Reviews

Ranking in other categories

Unified Communications (5th)

Mindshare comparison

Avaya Spaces and Kamailio SIP Server aren’t in the same category and serve different purposes. Avaya Spaces is designed for Enterprise Social Software and holds a mindshare of 1.3%, up 0.8% compared to last year.
Kamailio SIP Server, on the other hand, focuses on Unified Communications, holds 10.1% mindshare, down 10.3% since last year.

Enterprise Social Software Market Share Distribution
Product	Market Share (%)
Avaya Spaces	1.3%
Slack Business - Enterprise	15.5%
Microsoft Teams	14.4%
Other	68.8%

Enterprise Social Software

Unified Communications Market Share Distribution
Product	Market Share (%)
Kamailio SIP Server	10.1%
Cisco Unified Communications	12.9%
3CX Live Chat	9.6%
Other	67.4%

Unified Communications

Featured Reviews

Karina Rivadeneira

Account Manager at Dacas

A collaborative tool with a good noise cancellation feature

We use it to conduct meetings because it is private. The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features. The application also provides notices to everyone at the same time. You can easily use it on your phone, so it's a very…

Read full review

it_user183567

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

Read full review

See which vendors are best for you

Use our free recommendation engine to learn which Enterprise Social Software solutions are best for your needs.

See recommendations

867,676 professionals have used our research since 2012.

Questions from the Community

What needs improvement with Avaya Spaces?

I don't have experience with how Avaya Spaces handles integration with other software tools, but perhaps my partners have experience regarding integration with different vendors. If Avaya can integ...

See all answers

What is your primary use case for Avaya Spaces?

Most of the time, I use Avaya Spaces to hold meetings with Avaya and with partners, which fulfills our collaboration needs.

See all answers

What advice do you have for others considering Avaya Spaces?

I can share my opinion about Avaya Spaces and recommend it for small or medium company users, as most of them are small users. I am currently working with Azure for our cloud needs. Overall, I woul...

See all answers

Ask a question

Earn 20 points

Comparisons

Microsoft Teams vs Avaya Spaces

Compared 55% of the time

Fortinet FortiVoice vs Avaya Spaces

Compared 45% of the time

More Avaya Spaces Competitors

Alcatel-Lucent Rainbow vs Kamailio SIP Server

Compared 25% of the time

Digium Asterisk vs Kamailio SIP Server

Compared 22% of the time

Cisco Unified Communications vs Kamailio SIP Server

Compared 20% of the time

3CX Live Chat vs Kamailio SIP Server

Compared 20% of the time

Oracle Communications Unified Communications vs Kamailio SIP Server

Compared 12% of the time

More Kamailio SIP Server Competitors

Product Reports

Buyer's Guide

Enterprise Social Software

August 2025

Download Avaya Spaces product report

Buyer's Guide

Unified Communications

August 2025

Download Kamailio SIP Server product report

Also Known As

Avaya Cloud Application Link

No data available

Overview

The nature of work is ever changing. Right now, it’s more fast-paced, less predictable. Avaya Spaces is how to handle your usual tasks, but also the unplanned and new-priority work that arrives nearly every day. Work from anywhere and still show up.

Avaya

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

Stop Soldier Suicide, British Columbia Ski Resort, Helse Vest, Spital Limmattal, Conduit Global

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

Buyer's Guide

Enterprise Social Software

August 2025

Download Free Report

Find out what your peers are saying about Microsoft, Slack, Atlassian and others in Enterprise Social Software. Updated: August 2025.

DOWNLOAD NOW

867,676 professionals have used our research since 2012.

We monitor all Enterprise Social Software 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.