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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
13th
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 October 2026, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.8%, up from 1.3% compared to the previous year. The mindshare of Slack Business - Enterprise is 9.8%, down from 15.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Mindshare Distribution
ProductMindshare (%)
Slack Business - Enterprise9.8%
Avaya Spaces1.8%
Other88.4%
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."
"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 most valuable feature is the screen sharing, which works well."
"Tasks and team huddles are the most valuable features of Slack."
"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."
"Slack's stability is exceptional."
"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 event, a company-wide gathering, or a social event, all the information is shared there. This keeps us all updated."
"The interface looks better to me, it is more easy to use, and everything is working okay for our purposes."
"Slack is a really easy collaboration tool to use and many companies are adopting this popular tool."
"It has become easier to use than Teams, which is the main benefit of Slack Business - Enterprise; it is simple and connected."
 

Cons

"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 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."
"Sometimes Slack behaves unexpectedly and shuts down without notification or support communication."
"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."
"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."
"For me, the only thing I can say is that every time somebody sent me an attachment, the attachment was listed somewhere, and then I had to open the conversation and go to the individual to open it. So there is no handy repository or an easy way to quickly look at attachments. For me, that was a bit difficult."
"The reason is we are moving towards a new CRM, so we have a suitable solution to integrate with the new CRM."
"I would like to see the social sharing of blogs, announcements, or other news directly from the message corner."
"Slack could add additional and better integrations."
"Slack does not have videoconferencing capabilities, which would have been nice."
 

Pricing and Cost Advice

"The license grants you a subscription and costs about $120. I am not aware of additional costs."
"The tool's pricing could be cheaper."
"It is an affordable solution."
"Slack is definitely worth the money."
"It is an expensive tool. We pay 15 to 20 USD monthly per user."
"We use the free version that does not have a license."
"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 solution’s pricing is cheap."
"The solution is expensive."
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Top Industries

By visitors reading reviews
No data available
Outsourcing Company
16%
Financial Services Firm
11%
Construction Company
9%
Performing Arts
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business59
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.
919,894 professionals have used our research since 2012.