What does Rocket.Chat replace?

Rocket.Chat is a free alternative to Slack ($87/yr).

Is Rocket.Chat open source?

Yes. Rocket.Chat is licensed under MIT, an OSI-approved open-source license.

Yes (self-hosted server; web UI).

Yes. Rocket.Chat is a server app you run on your own server, and its repository includes Docker files.

A free, open-source alternative to Slack. Switching saves $87/yr at list price.

Checked Oct 17, 2026 · How we check

Self-hosted server

Open source · MIT Linux Self-hostable

RocketChat/Rocket.Chat46.3k★last push Oct 13, 2026checked Oct 17, 2026

Self-host

Runs on your own Linux server, with Docker files in the repo. Setup docs are on rocket.chat.

What does Rocket.Chat replace?: Rocket.Chat is a free alternative to Slack ($87/yr).
Is Rocket.Chat open source?: Yes. Rocket.Chat is licensed under MIT, an OSI-approved open-source license.
Does Rocket.Chat run on Linux?: Yes (self-hosted server; web UI).
Can you self-host Rocket.Chat?: Yes. Rocket.Chat is a server app you run on your own server, and its repository includes Docker files.