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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

"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."
"The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features."
"The product gives the best user experience."
"Slack kept several remote employees working cohesively and seamlessly together, allowing us to more easily synchronize our efforts and work collaboratively rather than islands unto ourselves, so to speak."
"Slack is just a communicator, no more."
"The portal is at its best version now."
"The most valuable feature for me was the different channels."
"The most valuable feature is that we can easily integrate different workloads and the alerts are reliable. Also because it allows us to use it as a monitoring tool sometimes."
"Slack offers the ability to make customizable applications and plugins."
"It is easy to set up."
 

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."
"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 product should provide integration with other solutions like Gmail or Outlook."
"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."
"Microsoft and Google are creating competitive equivalents. Slack needs to find a "secret sauce" that can differentiate them further."
"When scaled on a large scale, the solution's cost becomes a matter of concern for organizations."
"We’d like it to have more capability for everyone to work on one doc in real time all at once."
"I'd like the ability to re-organize the channels in my list. You can favorite a channel but you can't organize them in a specific order that fits your everyday use."
"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."
"The notifications on the phone are delayed."
 

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 solution’s pricing is cheap."
"It is less expensive than one of its competitors."
"I would rate the tool's pricing a four out of ten."
"When it comes to pricing, it is on the expensive side."
"It's on the more expensive side."
"The solution is cheap in my country."
"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."
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Top Industries

By visitors reading reviews
No data available
Outsourcing Company
18%
Financial Services Firm
11%
Construction Company
9%
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: September 2026.
913,924 professionals have used our research since 2012.