No usernames, no phone numbers, no central directory. SimpleX connects people using one-time invites and private relays, keeping your identity out of band.
Updated: 2025-09-10
How it’s different
No global ID to track or harvest.
Connection via one-time links/QRs; rotate identities as needed.
Open-source clients and infrastructure.
Quick start
Install SimpleX on two devices.
Create a new chat identity; share an invite link/QR out-of-band.
Once connected, messages are E2E encrypted; rotate identities for different contexts.
Tips
Use different identities for different circles (work/friends/public).
Back up your local keys if you move devices.
For sensitive use, keep metadata minimal (no cloud backups).