Your data stays on your server
Messages, files, and member accounts live on your group’s own Chatto server. They are never shared with other servers, and nothing is public unless you make it so. The app connects you to each community separately.
Work together. Stay independent.
Open-source chat for your team or community. Host it yourself for free, or use our hosting.
Chatto Cloud is coming soon. We’re a German company, and your data stays in the EU, protected by the GDPR.
Feels familiar? It should.
Rooms, threads, reactions, calls, and more. Everything you already know how to use, on a server of your own.
Your conversations stay yours
Every Chatto server is independent. Run your own for free, or let us host it for you.
Free to host yourself
Chatto is open source. Install it on your own hardware at no cost, with every feature included. It’s the same server we run in the cloud, so you can switch between the two with a backup and restore.
Or let us host it
Chatto Cloud is coming soon. We run your server in Europe and take care of updates and backups. ChattoCorp GmbH operates it from Germany, under European data protection law. More regions are planned for 2027.
Plus everything else your group needs: threads, calls, bots, and so much more.
Explore featuresBots and AI, on your terms
Bring AI assistants and automations into your rooms. Your conversations stay on your server, and you decide what each bot can see and which AI provider it uses.
Always clearly a bot
Bots wear a BOT badge everywhere and can’t sign in like a person. Every bot has an owner you can message, and anyone can check what it’s allowed to do.
Sees only what you allow
New bots start with no permissions. Limit one to the threads it’s called into, and it never sees the rest of the room. A bot can never do more than its owner.
Bring your own AI
Connect an AI assistant through MCP, post alerts with webhooks, or build your own bot with the public API.
Leave the hosting to us
Chatto Cloud is coming soon: your own server, hosted in Europe, without running it yourself. Updates and backups included.
Come say hello
Join us at Chatto HQ, our public community. You can try the latest version and have a chat with us.