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Avaya Spaces vs Slack Business - Enterprise comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Aug 4, 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
17th
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
7.5
Number of Reviews
76
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Enterprise Social Software category, the mindshare of Avaya Spaces is 1.2%, up from 0.8% compared to the previous year. The mindshare of Slack Business - Enterprise is 13.0%, up from 10.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software
 

Featured Reviews

Karina Rivadeneira - PeerSpot reviewer
A collaborative tool with a good noise cancellation feature
We use it to conduct meetings because it is private.  The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features. The application also provides notices to everyone at the same time. You can easily use it on your phone, so it's a very…
Awais Mehmood - PeerSpot reviewer
Automation features and user-friendly interface support seamless communication
Slack is very supportive in terms of communication between my colleagues and clients. While working with the reimbursement feature, I found the automation capabilities on Slack to be incredibly useful, allowing me to automate messages for specific dates or times and even to greet someone on their birthday. I haven't specifically used the channel organization feature of Slack, as I am added to channels, but I use it with Airtable, which automates notifications to a specific Slack channel when a user fills out a form on our website. In my experience, Slack is a stable product for communication, and I appreciate its automation features and integration of AI capabilities for enhancing specific functions.

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."
"The most valuable feature for me was the different channels."
"What I find valuable in Slack is that the interface is very attractive and it's easy for any new person to adapt to."
"The most valuable feature is the screen sharing, which works well."
"We use Slack for general communication, conference calls, and sharing screens because we have people working from different countries."
"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."
"Slack is a powerpack bundle of features that help small or large organizations to handle teams and their tasks."
"Slack's stability is exceptional."
"The product gives the best user experience."
 

Cons

"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."
"The audio calling service needs to improve its quality."
"Customization is something that Slack is lacking."
"The tool should be able to fetch a conversation when we search for it even if it is in the thread."
"Slack's channel and chat management could be more intuitive."
"It would be better if Slack had a 'select all' option to delete all the files."
"The solution’s initial setup is not very easy."
"It is difficult to navigate the tool when I log in to two devices and start a video call."
"Its capabilities to provide security features could be better for corporations."
"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."
 

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 tool's pricing could be cheaper."
"It is an affordable solution."
"It is less expensive than one of its competitors."
"When it comes to pricing, it is on the expensive side."
"The solution’s pricing is cheap."
"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."
"It is an expensive tool. We pay 15 to 20 USD monthly per user."
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Top Industries

By visitors reading reviews
No data available
Performing Arts
14%
Computer Software Company
14%
Financial Services Firm
13%
University
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about Avaya Spaces?
The microphone's noise cancellation and static feature that record a human's voice are some of the most valuable features.
What is your experience regarding pricing and costs for Avaya Spaces?
The license grants you a subscription and costs about $120. I am not aware of additional costs.
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 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?
From my perspective, a disadvantage of Slack compared to Teams is that connecting between the apps can be a bit difficult. In Teams, all applications available in the Microsoft launchpad are easily...
 

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: July 2025.
865,295 professionals have used our research since 2012.