Open Source Alternatives to Microsoft Teams
Rocket.Chat
The secure communications platform for mission-critical operations.
★ 46,254 Updated: Oct 2026 Status: Active
Mattermost
Mission-critical collaboration for technical teams
★ 39,324 Updated: Oct 2026 Status: Active
Zulip
Chat for distributed teams.
★ 26,046 Updated: Oct 2026 Status: Active
Element
Secure collaboration and messaging
★ 13,563 Updated: Oct 2026 Status: Active
BigBlueButton
Open-source web conferencing system
★ 9,239 Updated: Oct 2026 Status: Active
Twake
The open Digital Workplace for team collaboration.
★ 1,922 Updated: Feb 2026 Status: Slowing
W
Wire
The most secure collaboration platform.
Status: Unknown