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Microsoft Teams 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:
 

ROI

Sentiment score
5.8
Microsoft Teams enhances remote work by saving time, boosting collaboration, and reducing travel costs, proving a valuable investment.
Sentiment score
5.6
Slack Business Enterprise had a 40% ROI, boosting productivity, content organization, and collaboration, though some desired better pricing.
 

Customer Service

Sentiment score
6.2
Users experience varied Microsoft Teams support, with differences in responsiveness and effectiveness based on support tier purchased.
Sentiment score
6.2
Users rarely need Slack Enterprise support due to platform reliability; when contacted, support is quick and effective.
Microsoft support is excellent, offering instantaneous assistance through either robo support or live personnel.
We have cases where it took more than six months to resolve very basic issues.
I have logged tickets for Office 365 and received responses within 24 hours, depending on the severity.
We tend to focus more on Workato for support, but internally we raise service requests with the infrastructure team for any issues related to Slack.
 

Scalability Issues

Sentiment score
7.7
Microsoft Teams is praised for its scalability and seamless integration, supporting small to large organizations effectively despite occasional challenges.
Sentiment score
7.5
Slack Enterprise is scalable and supports large teams, though managing channels can be complex with growing user numbers.
Microsoft Teams is a scalable solution.
Microsoft Teams is scalable, and I have successfully conducted sessions with close to forty people without significant issues.
Slack is endlessly scalable.
Slack is not as comprehensive as Microsoft Teams in terms of scheduling and hosting meetings.
A user who engages with Slack daily and utilizes various features would provide more valuable insights.
 

Stability Issues

Sentiment score
7.5
Microsoft Teams is stable, with few bug reports; issues usually stem from internet connectivity rather than the app itself.
Sentiment score
7.8
Slack Business - Enterprise is stable and reliable, though some users report occasional slowdowns, crashes, and notification issues.
I appreciate the ability of Microsoft Teams to control the quality of the call.
Microsoft Teams is stable once the setup is completed properly.
For stability in Microsoft Teams, I would rate it a five.
It integrates with various systems, allowing us to manage site reliability, availability, and reliability.
Slack's stability is a perfect 10.
Occasionally, Slack behaves unexpectedly and shuts down, which can be irritating, especially when I am in the middle of a task.
 

Room For Improvement

Microsoft Teams users seek better usability, integration, performance, customization, and security to address issues like resource usage and slow performance.
Slack Business needs improved video, integration, performance, security, scalability, and user-friendliness with better pricing for freelancers.
AI capabilities should be integrated into Microsoft Teams to provide better transcript services and offer multiple language support.
The biggest issue with Microsoft Teams is switching identities, especially when communicating with external organizations.
Microsoft Teams could be improved through more synchronization with other platforms like Calendly and Gmail.
We can also improve the creation of channels, particularly in terms of privacy, security, flexibility, and the addition of members to newly created channels.
Configuring chats and pinning in Teams is easier, even though Slack has these features, they are not intuitive enough to engage with.
There is a need to add a call group feature to facilitate scheduling and conducting meetings within Slack.
 

Setup Cost

Microsoft Teams offers competitive pricing, often bundled with Microsoft 365, featuring discounts for government, educational sectors, and a free trial.
Users have mixed views on Slack pricing; it's deemed affordable by some and costly by others, influencing plan choices.
Microsoft Teams is economical when purchased as part of an Office 365 bundle.
Microsoft Teams comes with Office 365 licenses like E3, but there are options for those who prefer not to pay for Teams by using alternative products like Slack.
Regarding the license, the Microsoft 365 license I am taking is quite expensive, and every year it goes higher.
 

Valuable Features

Microsoft Teams enhances productivity with integration, superior communication, easy file sharing, robust collaboration tools, and intuitive user interface.
Slack Business enhances team productivity through seamless integration, advanced organization, customizable notifications, and an intuitive interface.
Teams offers the ability to record sessions and store them in OneDrive, which provides 1 terabyte of space.
The platform is user-friendly and has positively impacted our communication, allowing us to communicate with people from different countries and cities in real time.
The biggest advantage of Microsoft Teams is that it is a combined package where I can do chat, video conferencing, work on spreadsheets, documents, and other things with many people sitting at my desk, which makes work easy, especially with clients who are in remote locations, so it saves a lot of time.
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.
In managing releases via Slack channels, one major advantage over Teams is the ability to have threaded discussions, which helps in catching up on relevant discussions without the distraction of interleaved conversations.
The integration with Google Calendar is easy to use and allows us to receive notifications before meetings.
 

Categories and Ranking

Microsoft Teams
Ranking in Enterprise Social Software
1st
Average Rating
8.2
Reviews Sentiment
7.2
Number of Reviews
172
Ranking in other categories
Virtual Meetings (3rd)
Slack Business - Enterprise
Ranking in Enterprise Social Software
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
78
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Enterprise Social Software category, the mindshare of Microsoft Teams is 14.0%, up from 12.8% compared to the previous year. The mindshare of Slack Business - Enterprise is 15.8%, up from 10.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Market Share Distribution
ProductMarket Share (%)
Microsoft Teams14.0%
Slack Business - Enterprise15.8%
Other70.2%
Enterprise Social Software
 

Featured Reviews

Anna Virtsan - PeerSpot reviewer
Have streamlined daily workflow and task management but still face inconvenience from recent interface changes and limited integration options
There are challenges and issues in Microsoft Teams, such as after recent updates where group chats were combined with Teams, chats, and groups into one. Users have to work with settings to make it normal again so Teams are separated from chats, and that was a really inconvenient update. Many users ask me to help make it back again to separate Teams and groups from one-to-one chats. That's probably the worst update they've made recently. Additionally, there are some minor features, such as when I work with messages, I don't have an actual forward or quote option when replying to someone's message. I need to be careful not to miss the quote sign. For a lot of people, they are confused about where the quotes option is. I've received a couple of hundred support tickets just regarding this issue. The function to share email to Teams chat doesn't work sometimes due to our compliance policies, and sometimes it would be nice to be able to forward an email to the group chat and have further discussions. Microsoft Teams could improve by being less glitchy because it glitches a lot, leading to undelivered emails and undelivered messages. It would be beneficial if the MS application Shifts, which adds functionality to groups, could be integrated into the groups calendar. Currently, many teams don't use the app because it is not integrated with the general calendar or the Outlook calendar, making it basically a useless application. The platform needs less Copilot and more people. The general Copilot integration into the platform is less glitchy, but Microsoft Teams is quite heavy and glitchy sometimes. Stability depends a lot on compliance restrictions, policies, and quality of internet. Sometimes, when updates are enrolling, the platform glitches, breaks, or shuts down.
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.
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Top Industries

By visitors reading reviews
Financial Services Firm
23%
Manufacturing Company
9%
Educational Organization
8%
Computer Software Company
7%
Performing Arts
19%
Computer Software Company
13%
Financial Services Firm
11%
University
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business64
Midsize Enterprise43
Large Enterprise67
By reviewers
Company SizeCount
Small Business54
Midsize Enterprise13
Large Enterprise21
 

Questions from the Community

What do you like most about Microsoft Teams?
The most valuable feature of Microsoft Teams for us is the ability to share files from OneDrive seamlessly.
What is your experience regarding pricing and costs for Microsoft Teams?
Regarding the license, the Microsoft 365 license I am taking is quite expensive, and every year it goes higher. The solution is expensive for Microsoft Teams as well.
What needs improvement with Microsoft Teams?
There are challenges and issues in Microsoft Teams, such as after recent updates where group chats were combined with Teams, chats, and groups into one. Users have to work with settings to make it ...
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?
The direct call feature could be enhanced, particularly when calling peers. When showing screens during calls, the screen sharing functionality is not as smooth as Google's offering. It appears to ...
 

Also Known As

MS Teams
No data available
 

Overview

 

Sample Customers

Honeywll, AIRFRANCE, AccuWeather, Lilly
Strava, The New York Times, Spotify, Blue Bottle Coffee Company, Eventbrite, Box, Circa, Stripe
Find out what your peers are saying about Microsoft Teams vs. Slack Business - Enterprise and other solutions. Updated: September 2025.
872,778 professionals have used our research since 2012.