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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
14th
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 September 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.9%, up from 1.3% compared to the previous year. The mindshare of Slack Business - Enterprise is 10.5%, down from 15.5% 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

"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."
"In terms of setup, approaching its menu is simple."
"The huddle feature is valuable to me."
"In the cases where it fits best with the team, Slack can be a replacement and enhancement to collaboration, increased productivity, and reduced clutter in email."
"The product makes communication seamless."
"It has not crashed once in three years, so I would say it's pretty good."
"What I find valuable in Slack is that the interface is very attractive and it's easy for any new person to adapt to."
"Technical support is excellent."
"One thing I like about Slack is the ability to change the color of Slack. It depends on my mood. When I'm having a bright day, I just change the background color of my Slack, which is nice."
 

Cons

"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."
"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."
"For me, the only thing I can say is that every time somebody sent me an attachment, the attachment was listed somewhere, and then I had to open the conversation and go to the individual to open it. So there is no handy repository or an easy way to quickly look at attachments. For me, that was a bit difficult."
"I haven't experienced any noticeable return on investment since starting with Slack."
"The reason is we are moving towards a new CRM, so we have a suitable solution to integrate with the new CRM."
"I would like to be able to notify users that they have messages that need their immediate attention."
"We could see improvement in Slack by having an integrated meeting tool. Currently, we rely on third-party integration tools like Zoom to schedule meetings. It would be much more convenient to schedule meetings directly within Slack without additional integrations. It needs to have calendar and CRM integrations as well."
"When showing screens during calls, the screen sharing functionality is not as smooth as Google's offering. It appears to be designed for short calls, which limits its effectiveness for longer sessions."
"Threaded discussion needs improving."
"Sometimes Slack behaves unexpectedly and shuts down without notification or support communication."
 

Pricing and Cost Advice

"The license grants you a subscription and costs about $120. I am not aware of additional costs."
"It is an expensive tool. We pay 15 to 20 USD monthly per user."
"The solution is cheap in my country."
"We use the free version that does not have a license."
"The solution is expensive."
"The solution’s pricing is cheap."
"When it comes to pricing, it is on the expensive side."
"It's on the more expensive side."
"The tool's pricing could be cheaper."
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Top Industries

By visitors reading reviews
No data available
Outsourcing Company
16%
Financial Services Firm
11%
Construction Company
10%
Performing Arts
9%
 

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: August 2026.
911,994 professionals have used our research since 2012.