Linen vs Mattermost

Comparing two open source alternatives to Slack and Discord. Use the comparison below to decide which one fits your needs.

Linen

AGPL-3.0

Lightweight, Google-searchable open source Slack and Discord alternative designed for online communities.

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Mattermost

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

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Side-by-side comparison

	Linen	Mattermost
License	AGPL-3.0	—
Self-hostable	Yes	No
GitHub Stars	2,774	39,306
Forks	109	9,043
Open Issues	136	1,087
Last Commit	Dec 9, 2024	Oct 10, 2026
First Released	Feb 15, 2022	Jun 15, 2015
Categories	Team Chat & Messaging Tools	Team Chat & Messaging Tools
Tags	—	—

GitHub stars over time

Linen2,774

Mattermost

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