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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
12th
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 June 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.9%, up from 0.7% compared to the previous year. The mindshare of Slack Business - Enterprise is 9.6%, 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 - Enterprise9.6%
Avaya Spaces1.9%
Other88.5%
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."
"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."
"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."
"Our internal team primarily used Slack for communication with each other, and if two or three people were working on the same modules then they were able to share code and work together."
"Slack is very supportive in terms of communication between my colleagues and clients."
"I am impressed with the product's calls and screen share features which are very useful."
"In my opinion, the integrations feature is the most powerful feature because some issues are of immediate priority and we want to get the notification promptly, and through the Jira plug-in, we are getting those."
"You can create channels between teams internally and externally, which is great. There is a lot of security with Slack internal, which is what I value."
"The solution has a great user interface and functionalities. It has good features that we can use. We can integrate any third-party application with Slack so that it provides you with insights and updates in real-time on Slack itself."
"The integration with Google Calendar is easy to use and allows us to receive notifications before meetings."
 

Cons

"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."
"There were some additional features coming up, as they informed us through email. But we didn't get any update on them."
"The solution’s initial setup is not very easy."
"There is some lag at times."
"The reason is we are moving towards a new CRM, so we have a suitable solution to integrate with the new CRM."
"I haven't experienced any noticeable return on investment since starting with Slack."
"Tried to find information about advance settings for notifications, but did not find what I was looking for."
"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."
"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."
"The solution should have less frequent updates."
 

Pricing and Cost Advice

"The license grants you a subscription and costs about $120. I am not aware of additional costs."
"It is less expensive than one of its competitors."
"I would rate the tool's pricing a four out of ten."
"The solution is cheap in my country."
"The solution is expensive."
"Slack is definitely worth the money."
"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."
"When it comes to pricing, it is on the expensive side."
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Top Industries

By visitors reading reviews
No data available
Financial Services Firm
15%
Performing Arts
11%
Construction Company
11%
Outsourcing Company
8%
 

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.
900,747 professionals have used our research since 2012.