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Avaya Spaces vs Slack Business - Enterprise comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 9, 2025

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
6.8
Number of Reviews
78
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of December 2025, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.9%, up from 0.8% compared to the previous year. The mindshare of Slack Business - Enterprise is 13.1%, up from 11.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Market Share Distribution
ProductMarket Share (%)
Slack Business - Enterprise13.1%
Avaya Spaces1.9%
Other85.0%
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.
SM
Director at Xander & Thomas
Has improved internal communication through simple messaging and faster search
It has become easier to use than Teams, which is the main benefit of Slack Business - Enterprise. It is simple and connected. Searching in Slack Business - Enterprise is very easy. Slack Business - Enterprise is superior compared to Teams. Slack Business - Enterprise is very stable. Granola (G R A N U L A) is an AI notetaker that is quite effective.

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 offers several valuable features. Firstly, they have a message deletion feature, which is now available in other software as well, but Slack was the one who introduced it in enterprise solutions."
"Slack makes it easy for employees to contact each other and exchange documents or information."
"Slack offers the ability to make customizable applications and plugins."
"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."
"With respect to being a clean and efficient communications platform, I think that it does the job quite well."
"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."
"It's valuable for announcements and communicating between team members."
"I am impressed with the product's calls and screen share features which are very useful."
 

Cons

"There were some additional features coming up, as they informed us through email. But we didn't get any update on them."
"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."
"Slack's channel and chat management could be more intuitive. Configuring chats and pinning in Teams is easier, even though Slack has these features, they are not intuitive enough to engage with."
"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."
"I would like to be able to do live streaming on Slack. Slack allows Slack huddle where you can do a group call, but it is not very well-designed. I'm not sure if it is going very well, but live streaming is one thing that I would definitely love to see. When you use Zoom, I like how you can run webinars. If we could do that through Slack, it would become an all-integrated platform. I would also like to be able to schedule meetings using Slack, similar to Zoom."
"It would be highly advantageous if it could incorporate calendar information from sources like Outlook or Gmail, providing users not only with meeting schedules but also a comprehensive daily agenda view."
"It would be better if Slack had a 'select all' option to delete all the files."
"The video calling experience on Slack needs improvement."
"I would like to see the social sharing of blogs, announcements, or other news directly from the message corner."
"From my perspective, a disadvantage of Slack compared to Teams is that connecting between the apps can be a bit difficult."
 

Pricing and Cost Advice

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

By visitors reading reviews
No data available
Performing Arts
20%
Financial Services Firm
13%
Computer Software Company
12%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business54
Midsize Enterprise13
Large Enterprise21
 

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 do you like most about Slack?
Nowadays, we don't need to visit an HR portal. Our marketing and human resources teams directly share details about birthdays, upcoming events, and important dates in Slack. Whether it's a training...
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?
The direct call feature could be enhanced, particularly when calling peers. When showing screens during calls, the screen sharing functionality is not as smooth as Google's offering. It appears to ...
 

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: December 2025.
879,371 professionals have used our research since 2012.