Messaging
SimpleX Chat
SimpleX · UK · since 2022-10
The first messenger with no user identifiers — not even random IDs. Connect via one-time invitation links. Self-hostable relays. Smaller user base than Signal but the privacy model is stricter.
Open sourceAuditedSelf-hostableE2EEAGPL-3.0Free
Pros
- + Strongest metadata protection in any mainstream messenger
- + Zero knowledge of contact graph
- + Open protocol
Cons
- − Smaller user base
- − UX still maturing
- − No verified phone-style anti-spam
Highlights
- ▸No user identifiers (not even random)
- ▸Self-hostable relay servers
- ▸Quantum-resistant key exchange (2024)
Specs at a glance
- License
- AGPL-3.0
- Open source
- Yes
- E2EE
- Yes
- Audited
- Yes
- Self-host
- Yes
- HQ
- UK
- Pricing
- free
- Platforms
- 6 platforms