Microsoft Teams
Also known as: MS Teams, Teams meeting
Microsoft Teams is a communication and collaboration platform built into Microsoft 365.
It combines persistent chat channels, video and audio meetings, file sharing (via SharePoint), and app integrations in a single interface. Teams became the dominant enterprise meeting platform during the COVID-19 pandemic and is included in many Microsoft 365 business plans, although since 2024 some suites are also sold without it.
Microsoft Teams, explained at three levels
At home
Microsoft Teams is the app many workplaces use for video meetings and team chat. You can join meetings by clicking a link in a calendar invite, chat with colleagues in channels (organized group chats), and share files from your Microsoft 365 account. If your company uses Microsoft 365, Teams is almost certainly available to you.
At work
In a Microsoft 365 organization, Teams is where video meetings happen, projects get their own channels for discussion and file sharing, and company-wide announcements go. When someone sends a Teams meeting invite, you join by clicking 'Join Microsoft Teams Meeting' in the calendar event or email. You don't need to install anything: you can join from a browser.
At home
Teams organizes communication into Teams (groups of people) and Channels (topics within those groups). Each channel has a Posts tab for chat, a Files tab backed by SharePoint, and can have tabs for other apps. Video meetings support up to 1,000 participants with breakout rooms, polls, raised hands, and live captions.
At work
Teams Rooms is Microsoft's hardware and software system for conference rooms, allowing one-click meeting joins from a room screen. Teams Phone replaces traditional PBX phone systems with VoIP calling from within the Teams app. Teams integrates with hundreds of apps via its app store and can be customized with Power Automate workflows. Town halls and webinars support large-scale broadcasts to thousands of attendees.
At home
Teams is less a single app than a front end stitched onto other Microsoft 365 services. Channel files live in a SharePoint site, files shared in private chats sit in the sender's OneDrive, and meetings are stored in Exchange calendars. That is why permissions and storage limits come from those services, and why deleting a team's SharePoint site takes its files with it. In my view, knowing where each piece is actually stored is the key to understanding and trusting Teams.
At work
Teams is governed through the Teams Admin Center, where admins configure meeting policies (who can record, present, or use the lobby), messaging policies, and app permission policies. The Graph API exposes Teams data for reporting and automation: activity reports, channel membership, and meeting attendance data are available programmatically. Compliance features include eDiscovery for Teams messages, retention policies, and communication compliance policies for detecting inappropriate content.
Real-world examples
At home
Jerome's department switched to remote work and started using Teams for their weekly team meeting. He joined by clicking the link in his Outlook calendar invite, turned on his camera, and used the chat panel to ask a question during a presentation without interrupting the speaker.
At work
Nadia, an IT manager, set up a dedicated Teams structure for her company's annual product launch: one Team with channels for Marketing, Engineering, Sales, and Executive, each with their own file storage and pinned Planner boards. The launch coordination happened entirely in Teams, with daily standups via Teams meetings and approvals via adaptive card workflows.
How it compares
| feature | Microsoft Teams | Slack | Zoom |
|---|---|---|---|
| Primary strength | Microsoft 365 integration, meetings | Messaging, app integrations | Video meetings, ease of use |
| Included in | Many Microsoft 365 plans, or bought separately | Standalone subscription | Standalone subscription |
| File storage | SharePoint (deep integration) | Slack native plus third-party | Limited; links out to Drive or Dropbox |
| Meeting capacity | Up to 1,000 participants | 50 (Huddles, limited) | Up to 1,000 (Enterprise) |
| Best for | Microsoft 365 enterprises | Tech teams, developer toolchains | External meetings, webinars |
Microsoft Teams is the natural choice for Microsoft 365 organizations where it's already included and integrates directly with Outlook, SharePoint, and OneDrive. Slack is better for teams that prioritize messaging workflow and broad app integrations. Zoom is the strongest standalone meeting tool but lacks the persistent team chat depth of Teams or Slack.
For analysts
Many organizations run both Teams and Slack simultaneously, which fragments communication and creates confusion about where conversations should happen. A clear policy declaring one as the primary async channel is often the most impactful governance decision in a collaboration tool audit.
History & origin
Microsoft Teams launched in 2017 as Microsoft's response to Slack's rapid growth. It was built on Microsoft 365 infrastructure: SharePoint for file storage, Exchange for calendar integration, and Azure for video. During the COVID-19 pandemic in 2020, Teams usage grew from 32 million to 115 million daily active users in under a year. By 2024, Teams had over 300 million monthly active users. Microsoft's decision to bundle Teams free with Microsoft 365 prompted a European Commission antitrust investigation, leading Microsoft to sell Microsoft 365 without Teams in Europe from 2023 and worldwide from 2024.