Team chat the server can't read.
Prismara Talk replaces Microsoft Teams in the browser and on the desktop. Messages are encrypted and signed on each device with hybrid post-quantum keys, so the server stores only ciphertext and can neither read nor forge your conversations. Sign-in, licensing and the app launcher come from the rest of Prismara, so Talk fits straight into your tenant.
Demo with sample data at talk-demo.prismara.eu, separate from production.
See it working
Shown with sample data.
What Prismara Talk does
Rooms and direct messages
Group rooms and one-to-one conversations, with files kept inside the room they were shared in.
Post-quantum end-to-end encryption
Room keys are delivered with hybrid ML-KEM-768 and ECDH, and every device signs with hybrid ML-DSA-65 and ECDSA keys.
Device approval
A new device stays pending until a device you already use approves it, after you compare a short code on both screens.
Organisation key log
A hash-chained log of every device key and approval, checked by each client before it shares keys.
Single sign-on
Sign in with Prismara Identity in the browser or the desktop app; signing out centrally ends Talk sessions too.
Part of your tenant
Licences from Prismara Admin are checked on every request, and the shared app launcher takes people straight to their other Prismara apps.
How it's secured
Prismara Talk follows the engineering rules shared across the suite, plus these product-specific measures.
Server can't read or forge
The server holds only ciphertext, signatures, wrapped keys and routing data.
Post-quantum transport
Connections accept only post-quantum TLS, on top of end-to-end encryption.
Fails closed
If a licence can't be confirmed, access is refused rather than allowed.
Hardened deployment
Talk runs in hardened containers, and room and admin events go to a hash-chained audit log.
Connects to the rest of the suite
Want SovSec to run it for you?
SovSec provides managed security, SOC and Microsoft 365 services for organisations in the UK and DACH region, and can run Prismara as part of that service.