Mattermost Alternatives (January 2026)

Mattermost | Collaboration for Your Mission-Critical Work

https://mattermos.com/

Mattermost is a secure collaboration platform for accelerating mission critical work in complex environments.

4.4/5

1,025+ reviews

Reviewed on:

1.

Rocket.Chat: Communications Platform You Can Fully Trust

Explore Rocket.Chat, where we put data privacy into every conversation and enable teams to collaborate seamlessly.

2.

Nextcloud - Open source content collaboration platform

https://nextclou

The most popular open source content collaboration platform for tens of millions of users at thousands of organizations across the globe

3.

Collaboration software for software, IT and business teams

https://www.atlassia

Atlassian's team collaboration software like Jira, Confluence and Trello help teams organize, discuss, and complete shared work.

4.

Collaboration software for software, IT and business teams

https://support.atlassia

Atlassian's team collaboration software like Jira, Confluence and Trello help teams organize, discuss, and complete shared work.

5.

Frame.io | Home

Frame.io is the world's leading video review and collaboration platform. Share media, collect feedback, manage reviews, and deliver finished work faster — from anywhere in the world.

6.

Stackfield | All-in-One Collaboration Tool

https://www.stackfiel

End-to-end encrypted communication and collaboration with tasks, documents and projects for business teams.

7.

Slack is your productivity platform | Slack

Slack is a new way to communicate with your team. It’s faster, better organized, and more secure than email.

8.

Team Messenger & Online Collaboration Platform – Flock

https://www.floc

Flock, the best team communication app and online collaboration platform, comes with team messaging, project management and other great features that improve productivity and boost speed of execution.

9.

Zulip — organized team chat

Zulip is an organized team chat app, designed for efficient communication.