Chat software,
on your terms.
ChattoCorp builds Chatto: a modern, open-source home for communities to talk. Run it yourself, or let us run it for you.
A better place to talk.
Chatto is a fully-featured, secure real-time chat application for groups and communities. It is open source and free to self-host wherever you want.
Open source
Inspect it, adapt it, and host it on infrastructure you control.
Real-time
Built for quick, dependable conversations without unnecessary weight.
Self-hostable
Your community, your server, your rules. No platform lock-in.
Open source is the point.
Communication software should be understandable and under your control. Chatto is developed in the open so communities can choose how—and where—their conversations live.
View Chatto on GitHubLaunching in 2026
Chatto Cloud
Managed chat, with a fully European cloud region.
Chatto Cloud will offer a region hosted entirely in the EU and operated by an EU company. Choose it for European data residency, privacy, and digital sovereignty—without managing servers, updates, or scaling yourself.
Follow Chatto for updates