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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
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 February 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 2.3%, up from 0.8% compared to the previous year. The mindshare of Slack Business - Enterprise is 11.2%, down from 12.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Market Share Distribution
ProductMarket Share (%)
Slack Business - Enterprise11.2%
Avaya Spaces2.3%
Other86.5%
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 integration with Google Calendar is easy to use and allows us to receive notifications before meetings."
"Slack's stability is exceptional."
"Tasks and team huddles are the most valuable features of Slack."
"The product gives the best user experience."
"We use Slack for general communication, conference calls, and sharing screens because we have people working from different countries."
"Its intuitive design makes it easy to use and understand, hence we do not have a need to spend much on educating our teams."
"Slack is a very collaborative tool that makes it easier for me to communicate with the onboarding and billing teams."
"The solution makes it easy to create groups, share documents, and communicate."
 

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."
"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."
"The integration with SharePoint doesn’t work properly."
"It could be more stable than one of its competitors."
"I want a feature in the solution that will help me share documents only with the set of people that I prefer rather than all of them. I would also like the solution to have a feature similar to Microsoft SharePoint where you can group all your documents."
"Customization is something that Slack is lacking."
"I would like the text in chat to be more customizable."
"When someone responds to my message in Slack, a new window opens. There should be an option to roll down the answers."
"There are a lot of integrations and custom integrations available, but I believe there are opportunities to make those integrations much easier and faster, particularly for business or non-technical people."
 

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."
"When it comes to pricing, it is on the expensive side."
"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."
"I would rate the tool's pricing a four out of ten."
"It is an affordable solution."
"The solution is expensive."
"We use the free version that does not have a license."
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Top Industries

By visitors reading reviews
No data available
Performing Arts
18%
Financial Services Firm
11%
Computer Software Company
10%
Marketing Services Firm
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business57
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?
Slack Business - Enterprise keeps on adding a lot of features, but I would not comment from the feature point of view. Rather, I would comment on the ease of integration point of view. There is som...
 

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: February 2026.
882,103 professionals have used our research since 2012.