Chatto vs Discourse

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

Chatto

AGPL-3.0

A self-hosted chat application for teams and communities with video calls, voice calls, and screen sharing.

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Discourse

GPL-2.0

Open source community forum platform combining long-form discussion, real-time chat, and strong moderation. Self-host it or use managed hosting.

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Side-by-side comparison

	Chatto	Discourse
License	AGPL-3.0	GPL-2.0
Self-hostable	Yes	Yes
GitHub Stars	2,743	47,827
Forks	123	9,015
Open Issues	221	205
Last Commit	Sep 10, 2026	Sep 11, 2026
First Released	Apr 8, 2026	Jan 12, 2013
Categories	Team Chat & Messaging Tools	Team Chat & Messaging Tools
Tags	#chat #collaboration #self hosted #privacy	#forum #chat

GitHub stars over time

Chatto

Discourse47,827

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