Rocket.Chat

Open-source team chat that can be self-hosted, adopted by security-conscious companies in Korea and Japan.

Editor

Jake's editor note
A realistic Slack alternative where data must stay on-prem (public, finance, defense). Needs DevOps capacity to operate.
Jake (황관희)
Founder, 5years+ · Operator, Crewless
Last updated: 2026-04-17

Key Features

• Open-source team chat • Self-hosted or cloud • Live customer chat • Omnichannel • End-to-end encryption

Pricing

Community edition free (self-hosted); Enterprise cloud from $4/user/month.

FAQ

Vs Slack?

Full self-hosting and open-source licensing.

Mobile apps?

iOS and Android apps available.

Language support?

Official Korean and Japanese UIs.

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