9 self-hosted Microsoft Teams alternatives

Microsoft Teams is Microsoft's commercial collaboration platform offering chat, video meetings, and file sharing integrated with Microsoft 365. It is widely used in enterprises. These open-source apps let you replace Microsoft Teams with software you host and control yourself.

Best self-hosted Microsoft Teams alternatives

Rocket.Chat

Team Chat

Open-source team chat and collaboration platform

Replaces Slack, Microsoft Teams

★ 45.9k Medium setup MIT

Mattermost

Team Chat

Secure collaboration for developer teams

Replaces Slack, Microsoft Teams

★ 38.7k Medium setup AGPL-3.0

Zulip

Team Chat

Threaded team chat that combines email and chat

Replaces Slack, Microsoft Teams

★ 25.6k Medium setup Apache-2.0

Element Web

Matrix & XMPP

Glossy Matrix client for the web and desktop

Replaces Slack, Discord

★ 13.4k Easy setup AGPL-3.0

BigBlueButton

Video Conferencing

Virtual classroom and web conferencing for education

Replaces Zoom, Microsoft Teams

★ 9.2k Hard setup LGPL-3.0

Openfire

Matrix & XMPP

Real-time collaboration XMPP server written in Java

Replaces Slack, Microsoft Teams

★ 3.1k Medium setup Apache-2.0

La Suite - Meet

Video Conferencing

Simple and Secure Video Conferencing

Replaces BigBlueButton, Jitsi

★ 2.2k Medium setup MIT

Nextcloud Talk

Chat & Communication

Chat, video calls and webinars integrated into Nextcloud

Replaces Slack, Zoom

★ 2.2k Medium setup AGPL-3.0

Twake Workplace

Groupware

Open-source digital workplace and collaboration suite

Replaces Microsoft Teams, Slack

★ 1.9k Medium setup AGPL-3.0

Compare Microsoft Teams alternatives

Switching from Microsoft Teams

Moving off Microsoft Teams means trading a managed subscription for a service you run yourself. The payoff is ownership: no per-seat pricing, no vendor lock-in, and full control of your data. Start with the option above that matches your setup-difficulty comfort level — every app links to a detailed specs page and head-to-head comparisons.