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Microsoft Teams 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:
 

ROI

Sentiment score
5.7
Microsoft Teams proved essential during lockdowns, saving time and money while enhancing collaboration and integrating with Microsoft services.
Sentiment score
3.9
Slack Business boosts productivity and communication, offering 40% ROI, though users desire pricing improvements; generally rated seven out of ten.
 

Customer Service

Sentiment score
6.2
Companies have mixed experiences with Microsoft Teams support, valuing enterprise aid but noting slow communication and resolution times.
Sentiment score
6.0
Slack Business - Enterprise support is praised for responsiveness and helpfulness, with strong documentation and positive user experiences.
Microsoft support is excellent, offering instantaneous assistance through either robo support or live personnel.
CEO at Planfirma Technologies Private Limited
We have cases where it took more than six months to resolve very basic issues.
IT Project Manager at UkrSibbank
I have logged tickets for Office 365 and received responses within 24 hours, depending on the severity.
Microsoft Practice Lead at a tech services company with 11-50 employees
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.
Integration Engineer
When I connected to Slack Business - Enterprise API, tutorials and documentation were available online.
Da at hanasoft
If something was beyond their hands, then it would only be escalated to the external Slack team.
Senior Consultant at a consultancy with 10,001+ employees
 

Scalability Issues

Sentiment score
7.8
Microsoft Teams effectively scales for any user base, with smooth cloud integration, despite minor access and licensing challenges.
Sentiment score
7.3
Slack Business - Enterprise is scalable for small to large teams, though large user bases may require more resources.
Microsoft Teams is a scalable solution.
Master in Cyber Security at Ganpat University
Microsoft Teams can be scalable for more than 1,000 people, and I have seen video conferences with 5,000 participants, so the scale is incredible.
Senior Software Engineer at Endava
I do not see a limit to how many people can be added to Microsoft Teams.
Manager at NetEase
Slack is endlessly scalable.
Application Security Manager at Interact Intranet
Slack Business - Enterprise is a scalable product fitting for small businesses as well as enterprises, with no limitations on the number of users.
Da at hanasoft
Slack is not as comprehensive as Microsoft Teams in terms of scheduling and hosting meetings.
Data Engineer at BlazeClan Technologies
 

Stability Issues

Sentiment score
7.5
Microsoft Teams is praised for stability, with occasional minor issues often resolved quickly, delivering strong performance across devices.
Sentiment score
7.8
Slack Enterprise is stable and dependable, with occasional lag and rare outages mostly due to updates or network issues.
I appreciate the ability of Microsoft Teams to control the quality of the call.
IT Project Manager at UkrSibbank
Microsoft Teams is stable once the setup is completed properly.
CEO at Planfirma Technologies Private Limited
For stability in Microsoft Teams, I would rate it a five.
Master in Cyber Security at Ganpat University
It integrates with various systems, allowing us to manage site reliability, availability, and reliability.
Application Security Manager at Interact Intranet
Slack's stability is a perfect 10.
Webflow Developer at Qureos
I do not see glitches, latency issues, or downtime.
Da at hanasoft
 

Room For Improvement

Microsoft Teams could enhance UI, file sharing, stability, reduce resource use, and improve integration, speed, and video quality.
Slack Business Enterprise seeks improved video calls, scheduling, integration, security, mobile functionality, and enhanced AI and collaboration features.
AI capabilities should be integrated into Microsoft Teams to provide better transcript services and offer multiple language support.
CEO at Planfirma Technologies Private Limited
The biggest issue with Microsoft Teams is switching identities, especially when communicating with external organizations.
Microsoft Practice Lead at a tech services company with 11-50 employees
Microsoft Teams could be improved through more synchronization with other platforms like Calendly and Gmail.
Team Lead at a tech services company with 51-200 employees
We can also improve the creation of channels, particularly in terms of privacy, security, flexibility, and the addition of members to newly created channels.
Integration Engineer
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.
Co Founder at a tech consulting company with 11-50 employees
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.
Senior Consultant at a consultancy with 10,001+ employees
 

Setup Cost

Microsoft Teams offers competitive enterprise pricing, often included in Office 365 bundles, but costs vary by user count and features.
Enterprise users generally find Slack's pricing reasonable, though some consider it expensive compared to free options for small teams.
Microsoft Teams is economical when purchased as part of an Office 365 bundle.
CEO at Planfirma Technologies Private Limited
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 Practice Lead at a tech services company with 11-50 employees
Regarding the license, the Microsoft 365 license I am taking is quite expensive, and every year it goes higher.
IT Manager at R K Khanna and Associates
 

Valuable Features

Microsoft Teams enhances collaboration with seamless Microsoft 365 integration, offering video, chat, document sharing, and robust remote work support.
Slack Business - Enterprise boosts productivity through seamless integration, intuitive interface, and efficient communication with customizable features and automation.
Teams offers the ability to record sessions and store them in OneDrive, which provides 1 terabyte of space.
CEO at Planfirma Technologies Private Limited
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.
Team Lead at a tech services company with 51-200 employees
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.
IT Manager at R K Khanna and Associates
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.
Webflow Developer at Qureos
Slack Business - Enterprise is beneficial for us primarily because the API was very beneficial, and that is the main one;
Da at hanasoft
We use the incoming webhook to push end results of automation, which makes our life easier by allowing us to easily check the status of our automation jobs through our corporate phone while in Slack itself.
Senior Consultant at a consultancy with 10,001+ employees
 

Categories and Ranking

Microsoft Teams
Ranking in Enterprise Social Software
1st
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
173
Ranking in other categories
Virtual Meetings (4th)
Slack Business - Enterprise
Ranking in Enterprise Social Software
2nd
Average Rating
8.4
Reviews Sentiment
5.9
Number of Reviews
82
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Enterprise Social Software category, the mindshare of Microsoft Teams is 8.8%, down from 11.3% compared to the previous year. The mindshare of Slack Business - Enterprise is 11.5%, down from 11.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Social Software Market Share Distribution
ProductMarket Share (%)
Microsoft Teams8.8%
Slack Business - Enterprise11.5%
Other79.7%
Enterprise Social Software
 

Featured Reviews

Anna Virtsan - PeerSpot reviewer
IT Project Manager at UkrSibbank
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.
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.
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Top Industries

By visitors reading reviews
Financial Services Firm
23%
Manufacturing Company
9%
Computer Software Company
8%
Educational Organization
7%
Performing Arts
20%
Financial Services Firm
13%
Computer Software Company
11%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business64
Midsize Enterprise43
Large Enterprise70
By reviewers
Company SizeCount
Small Business56
Midsize Enterprise13
Large Enterprise23
 

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?
Today, we do not integrate any third-party apps into Microsoft Teams, but we may use project management tools such as Jira in the future. We used to integrate something, but now we do not need 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?
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

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: December 2025.
881,082 professionals have used our research since 2012.