Compare Rocket.Chat alternatives
Rocket.Chat is itself open source (MIT licensed) — a self-hosted, all-in-one communication platform with messaging, voice, video, and AI. If you're here, you're most likely comparing it against other open-source team and community chat tools rather than escaping a proprietary vendor.
Which one fits depends on your use case. For workplace team chat, Mattermost is the closest all-in-one alternative (strong on developer workflows and playbooks), while Zulip takes a different approach with topic-based threading that suits high-volume, asynchronous teams. If you want federation and default end-to-end encryption, Element and Cinny are built on the Matrix protocol, and Wire focuses specifically on end-to-end encryption and EU compliance. For a deliberately minimal option, Campfire (from 37signals) strips it back to rooms and DMs. For Discord-style community chat rather than workplace teams, Fluxer and Stoat are the closer fits, and Quiet takes a radically different peer-to-peer, no-server approach over Tor.
FAQ
Is there a free, open-source alternative to Rocket.Chat?
Rocket.Chat is already open source (MIT). If you want alternatives, Mattermost (MIT), Zulip (Apache-2.0), and Campfire (MIT) are all permissively licensed and free to self-host, alongside AGPL/GPL options like Element, Wire, and Quiet.
What's the best open-source alternative to Rocket.Chat for team chat?
Mattermost is the closest all-in-one match for workplace teams. Zulip is the better pick if your team is async-heavy and benefits from topic threading.
Which alternatives offer end-to-end encryption?
Element and Cinny (both Matrix-based) and Wire provide end-to-end encryption by default, whereas Rocket.Chat offers it as an option. Quiet goes further with a serverless, peer-to-peer design over Tor.
What are the top open-source alternatives to Rocket.Chat?
Browse all open-source alternatives to Rocket.Chat above, or explore the Collaboration and Community categories.