Chat freely. Stay private.
tjena!chat is a FluffyChat fork — open-source, end-to-end encrypted, hosted in Europe by the BiVi association. Currently invite-only: request your key via the contact page.
tjena!chat: Communication that respects you
A free messenger built on the open Matrix protocol — privacy-first and hosted in Europe.
End-to-End Encryption
Every message is encrypted before it leaves your device. Only you and your recipient can read it.
Matrix Protocol
tjena!chat is built on Matrix, the open communication standard. You can message users on any other Matrix server worldwide.
All Platforms
Available as a web app and native apps for Android, iOS, Windows, macOS, and Linux.
Open to the Whole Matrix Network
Your account on our server lets you send messages to users on any other Matrix server — no need to switch services.
Built on FluffyChat — with more on top
tjena!chat adds video calls, live location sharing, status stories, Signal and WhatsApp bridges, contact discovery, local backups, and more to the open-source FluffyChat client.
See all featuresGet tjena!chat
Available on every device — no account required to try the web app.
About Verein Bivi
We are a Swiss association committed to open and private digital communication in Europe.
Matrix-based
We build on the open Matrix protocol — for interoperability and independence from any single provider.
Community-driven
Run by volunteers who believe in free communication.
Privacy at the Core
Privacy is a foundational design principle, not an afterthought.