Cinny

What is Cinny?

Matrix chat client with a clean interface, end-to-end encryption and DMs kept apart from rooms.

Who is Cinny best for?

Cinny is best for Matrix users who want a simple, tidy web or desktop client for encrypted chat.

• Matrix newcomers

  Cinny keeps DMs apart from rooms and the screen free of clutter, which makes Matrix easier to start with.

• Encrypted conversations

  It supports Matrix end-to-end encryption for private chats and rooms.

• Homeserver operators

  Admins can host Cinny next to their homeserver and make it the default sign-in.

How much does Cinny cost?

Cinny is free and AGPL-3.0 licensed, with no paid plan; the project is funded by donations through Open Collective, GitHub Sponsors and Liberapay.

Cinny has no paid tier and runs on donations. Full pricing on github.com. We checked these prices on 8 Nov 2026.

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Is Cinny open source?

Yes. Cinny's code is public under the AGPL 3.0 licence, so you can run it on your own server.

What are the best Cinny alternatives?

Cinny is an open source alternative to Slack. Buzz, Rocket.Chat, Mattermost and 2 more do the same job and are open source too.

SlackFree

Team messaging with AI summaries, search and huddle notes.

BuzzOpen Source

Block's open-source team chat where people and agents share channels.

Rocket.ChatOpen Source

Team chat with channels, threads, calls and video that organisations run on their own servers.

MattermostOpen Source

Channels, calls, playbooks and AI agents for engineering, security and operations teams.

CampfireOpen Source

Group chat for companies that you install on your own server, with rooms, DMs and @mentions.

ColanodeOpen Source

Local-first workspace with team chat, Notion-style pages, databases and shared file storage.

Questions about Cinny