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Avaya Spaces vs Slack Business - Enterprise comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 15, 2026

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
Ranking in Enterprise Social Software
13th
Average Rating
7.6
Reviews Sentiment
7.4
Number of Reviews
3
Ranking in other categories
No ranking in other categories
Slack Business - Enterprise
Ranking in Enterprise Social Software
1st
Average Rating
8.4
Reviews Sentiment
5.6
Number of Reviews
83
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.8%, up from 1.3% compared to the previous year. The mindshare of Slack Business - Enterprise is 9.8%, down from 15.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Mindshare Distribution
ProductMindshare (%)
Slack Business - Enterprise9.8%
Avaya Spaces1.8%
Other88.4%
Enterprise Social Software
 

Featured Reviews

TM
Channel Director at a comms service provider with 11-50 employees
Video meetings and presentation sharing impress but user-friendliness and pricing need attention
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 integrate Spaces with other media solutions, such as WhatsApp or WeChat, it will be more friendly and useful for customers or partners.
Akhil Viswam - PeerSpot reviewer
Senior Consultant at a consultancy with 10,001+ employees
Threaded collaboration has transformed how our team tracks tickets and monitors automation updates
One suggestion I would make for improving Slack Business - Enterprise is the support of multimedia such as images and videos that we can easily share through Slack. That would be great. Additionally, another thing is AI integration; if Slack has some AI capabilities to get insights about conversations or summarization, that would be a great feature. If Slack has an AI feature that can summarize a particular Slack thread and provide a summary of that, that would be a great feature for us. I would rate it a ten if it comes with some AI features, particularly using generative AI to produce summarization and other kinds of insights from communication in a more secure, data-secure way.

Quotes from Members

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

Pros

"Stability for Avaya Spaces is quite good, and I would rate it a 9."
"We use the solution for document sharing, video conferencing, instant messaging, and file sharing."
"The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features."
"Slack Business - Enterprise has had a positive impact on our organization with better communication, provides faster response times, fewer emails, and has helped create a more agile company."
"Slack Business - Enterprise is beneficial for us primarily because the API was very beneficial, and that is the main one; the second benefit would probably be the upgrades they do, including integrating some AI and allowing customization of chats in categories."
"The solution's most valuable feature is the search functionality, which I can use to search for full text."
"The quick line of communication, most certainly improves the functionality of our organization."
"The most valuable features are video conferencing and sharing content during meetings."
"I think Slack is a very creative application to help unify communication across all team sizes."
"The solution makes it easy to create groups, share documents, and communicate."
"Process made easy Collaboration between teams increased Productivity is now largely increased: top."
 

Cons

"The audio calling service needs to improve its quality."
"The initial setup for Avaya Spaces is very good for me, but for sharing with other users, the setup is a little bit complex compared to other solutions I have used, such as Zoom or Teams, as the installation is more complex."
"There were some additional features coming up, as they informed us through email. But we didn't get any update on them."
"The mobile app needs improvement. It consistently misses notifications."
"When someone responds to my message in Slack, a new window opens. There should be an option to roll down the answers."
"The solution needs to improve its scalability."
"Some features and plugins can be pretty obscure or difficult to deploy."
"Slack does not have videoconferencing capabilities, which would have been nice."
"Customization is something that Slack is lacking."
"According to my observation, a large size file sharing feature is what can be expected, which will centralize all activities within Slack and that can save a lot of time."
"The solution should have less frequent updates."
 

Pricing and Cost Advice

"The license grants you a subscription and costs about $120. I am not aware of additional costs."
"Slack is definitely worth the money."
"The tool's pricing could be cheaper."
"It is an affordable solution."
"The solution’s pricing is cheap."
"The solution is cheap in my country."
"The solution is expensive."
"I would rate the tool's pricing a four out of ten."
"We use the free version that does not have a license."
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Top Industries

By visitors reading reviews
No data available
Outsourcing Company
17%
Financial Services Firm
11%
Construction Company
9%
Performing Arts
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business59
Midsize Enterprise13
Large Enterprise25
 

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...
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.
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...
What is your experience regarding pricing and costs for Slack?
I am not aware of pricing, setup costs, or licensing, due to my company's partnership with Slack.
What needs improvement with Slack?
I am uncertain how Slack Business - Enterprise can be improved. Better notification controls, improved threading, and more integrations are all good features that seem relevant.
What is your primary use case for Slack?
My main use case for Slack Business - Enterprise is connecting between different teams and facilitating communication for teams. A quick, specific example of how my teams use Slack Business - Enter...
 

Also Known As

Avaya Cloud Application Link
No data available
 

Overview

 

Sample Customers

Stop Soldier Suicide, British Columbia Ski Resort, Helse Vest, Spital Limmattal, Conduit Global
Strava, The New York Times, Spotify, Blue Bottle Coffee Company, Eventbrite, Box, Circa, Stripe
Find out what your peers are saying about Avaya Spaces vs. Slack Business - Enterprise and other solutions. Updated: September 2026.
917,382 professionals have used our research since 2012.