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Microsoft Teams vs Slack comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 20, 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
6.5
Microsoft Teams enhances collaboration and efficiency, saving time, reducing costs, and proving valuable during remote work.
Sentiment score
7.4
Slack boosts productivity and collaboration with a 40% ROI, praised for efficiency despite some desiring lower pricing.
 

Customer Service

Sentiment score
6.2
Many prefer internal support as Microsoft's assistance varies in responsiveness and effectiveness, influenced by support tier and call volume.
Sentiment score
7.1
Slack's reliable service rarely requires support, but customer service is responsive and effective, receiving high praise overall.
Microsoft support is excellent, offering instantaneous assistance through either robo support or live personnel.
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 scales efficiently for varied user sizes, with seamless integration and some potential file storage challenges.
Sentiment score
7.6
Slack efficiently scales for teams of all sizes, though free version limitations and management of many channels can be challenging.
Microsoft Teams is scalable, and I have successfully conducted sessions with close to forty people without significant issues.
Slack is endlessly scalable.
A user who engages with Slack daily and utilizes various features would provide more valuable insights.
Slack is not as comprehensive as Microsoft Teams in terms of scheduling and hosting meetings.
 

Stability Issues

Sentiment score
7.6
Microsoft Teams is stable with minor network-related issues, receiving high ratings for reliability and robust cross-device functionality.
Sentiment score
7.7
Slack is largely praised for its stability and reliability, with occasional minor issues typically related to integrations or updates.
Microsoft Teams is stable once the setup is completed properly.
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 requires enhanced integration, improved performance, better UI, security, and new AI features for optimal user experience.
Users suggest improvements in Slack's video chat, organization, integrations, interface, security, mobile capabilities, and non-developer functionalities.
Microsoft could take into consideration specific use cases with some restrictions, such as improving the compatibility between cloud and non-cloud setup.
Microsoft Teams could be improved through more synchronization with other platforms like Calendly and Gmail.
The biggest issue with Microsoft Teams is switching identities, especially when communicating with external organizations.
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 is cost-effective, often bundled with Office 365, offering flexible, affordable pricing with some geographical and feature-based variations.
Slack's free version suits small teams, while enterprises prefer paid plans for security, costing 15-20 USD per user.
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.
Microsoft Teams is economical when purchased as part of an Office 365 bundle.
 

Valuable Features

Microsoft Teams excels in communication and collaboration with robust features, Office 365 integration, and flexible, user-friendly access.
Slack excels in chat functionalities, app integrations, customization, productivity tools, and offers a seamless, secure communication platform.
Microsoft Teams is also noted for its compliance with GDPR and SOC 2, ensuring data security and compliance.
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.
It serves everything in one place and improves communication within organizations.
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
7.3
Number of Reviews
169
Ranking in other categories
Virtual Meetings (3rd)
Slack
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 July 2025, in the Enterprise Social Software category, the mindshare of Microsoft Teams is 12.5%, down from 15.9% compared to the previous year. The mindshare of Slack is 12.8%, up from 10.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software
 

Featured Reviews

Arun Srivastav - PeerSpot reviewer
Seamless presentation and collaboration enhance organizational productivity
There are three main areas for improvement: Firstly, AI capabilities should be integrated into Microsoft Teams to provide better transcript services and offer multiple language support. Secondly, it should allow participants to remain visible during presentations, enhancing interaction. Lastly, it needs broader integration capabilities with other products, like Salesforce ( /vendors/salesforce ), which is currently limited.
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
Educational Organization
36%
Financial Services Firm
16%
Manufacturing Company
7%
Government
6%
Educational Organization
50%
Computer Software Company
11%
Financial Services Firm
8%
University
4%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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?
Microsoft Teams comes with Office 365 ( /products/office-365-reviews ) licenses like E3, but there are options for those who prefer not to pay for Teams by using alternative products like Slack ( /...
What needs improvement with Microsoft Teams?
The biggest issue with Microsoft Teams is switching identities, especially when communicating with external organizations. Users often don't know they have messages from another company unless they...
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?
Sometimes Slack behaves unexpectedly and shuts down without notification or support communication. There is a need to add a call group feature to facilitate scheduling and conducting meetings withi...
 

Comparisons

 

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 and other solutions. Updated: June 2025.
860,632 professionals have used our research since 2012.