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Mattermost vs Rocket.Chat

A side-by-side look at 2 directory tools for 2026 — the verdict, pricing, ratings, features, and what readers think.

mattermost.com

Open-source, self-hosted team messaging for secure environments.

Visit Mattermost

rocket.chat

Open-source team chat with omnichannel and self-hosting.

Visit Rocket.Chat

Head to head

	Mattermost	Rocket.Chat