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Avaya Spaces vs Slack Business - Enterprise comparison

 

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
15th
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 August 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.9%, up from 1.2% compared to the previous year. The mindshare of Slack Business - Enterprise is 10.5%, down from 13.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Mindshare Distribution
ProductMindshare (%)
Slack Business - Enterprise10.5%
Avaya Spaces1.9%
Other87.6%
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

"The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features."
"We use the solution for document sharing, video conferencing, instant messaging, and file sharing."
"Stability for Avaya Spaces is quite good, and I would rate it a 9."
"Its intuitive design makes it easy to use and understand, hence we do not have a need to spend much on educating our teams."
"For projects, it's improved how we share files."
"I think Slack is a very creative application to help unify communication across all team sizes."
"The ability to create ad hoc channels for certain projects has made us more effective."
"We use thread-based communication. So that if a new person comes to look into a problem for a particular task, they can easily go and look into the particular thread it is discussed in."
"The solution makes it easy to create groups, share documents, and communicate."
"Initially I thought it cannot be better than Skype, but after working with it for a while I can definitely confirm it is a great tool for collaboration."
"Slack is a collaboration tool where you can create specific topic-related channels and manage different threads on different talks so people can interact and maintain a chat."
 

Cons

"The audio calling service needs to improve its quality."
"There were some additional features coming up, as they informed us through email. But we didn't get any update on them."
"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."
"Tried to find information about advance settings for notifications, but did not find what I was looking for."
"Better ways to help people get up to date when away from a conversation for a long time, or after bursts of a particular discussion."
"Slack's interface is not simple for me. It's not a user-friendly interface"
"The way groups are created on slack could be improved. Once you create a group of people, you can't add additional people unless you convert it to a channel."
"Slack's Canvas feature could be improved in terms of its user experience."
"We did have scalability issues. If you are on the free plan, you are only allowed 10,000 messages before everything is archived."
"It could be more stable than one of its competitors."
"Slack tends to crash once a month."
 

Pricing and Cost Advice

"The license grants you a subscription and costs about $120. I am not aware of additional costs."
"We use the free version that does not have a license."
"The pricing can range up to about twenty bucks a user. You can spend a lot of money, especially if you're talking about thousands of users. Generally speaking, Slack is less expensive than Teams. Slack doesn't include all the bells and whistles that Teams does. So you can go from a $6 license in Microsoft 365 to a $50 license per user per month, and there's a lot more you can do in the $50 license."
"The tool's pricing could be cheaper."
"Slack is definitely worth the money."
"I would rate the tool's pricing a four out of ten."
"It is an expensive tool. We pay 15 to 20 USD monthly per user."
"It is an affordable solution."
"The solution is cheap in my country."
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Top Industries

By visitors reading reviews
No data available
Outsourcing Company
14%
Financial Services Firm
12%
Construction Company
10%
Performing Arts
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business58
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: June 2026.
908,834 professionals have used our research since 2012.