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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
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
2nd
Average Rating
8.4
Reviews Sentiment
5.9
Number of Reviews
82
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 2.2%, up from 0.8% compared to the previous year. The mindshare of Slack Business - Enterprise is 11.5%, down from 11.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Market Share Distribution
ProductMarket Share (%)
Slack Business - Enterprise11.5%
Avaya Spaces2.2%
Other86.3%
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."
"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."
"I like Slack's notifications. It is more user-friendly and pleasing than Teams."
"The most valuable features are video conferencing and sharing content during meetings."
"The solution's most valuable feature is the search functionality, which I can use to search for full text."
"It allows to facilitate communication, allowing us to create channels for updates, file sharing, and photo sharing within our team profiles."
"Slack makes it easy for employees to contact each other and exchange documents or information."
"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."
"I am impressed with the product's calls and screen share features which are very useful."
"In managing releases via Slack channels, one major advantage over Teams is the ability to have threaded discussions, which helps in catching up on relevant discussions without the distraction of interleaved conversations."
 

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."
"The UI could be a little bit better."
"Slack should add a feature to schedule meetings."
"From my perspective, a disadvantage of Slack compared to Teams is that connecting between the apps can be a bit difficult."
"I haven't experienced any noticeable return on investment since starting with Slack."
"The integration with SharePoint doesn’t work properly."
"The excessive notifications and distracting nature keeps it from being a perfect solution for me."
"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."
"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."
"I would rate the tool's pricing a four out of ten."
"The solution is expensive."
"It is an affordable solution."
"It is an expensive tool. We pay 15 to 20 USD monthly per user."
"Slack is definitely worth the money."
"The solution is cheap in my country."
"The solution’s pricing is cheap."
"The tool's pricing could be cheaper."
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Top Industries

By visitors reading reviews
No data available
Performing Arts
20%
Financial Services Firm
13%
Computer Software Company
11%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business56
Midsize Enterprise13
Large Enterprise23
 

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.
880,745 professionals have used our research since 2012.