A fundamentally different security model. Traditional secure email encrypts your data and trusts one provider to protect the key. PRIVATE.ME splits your data across independent providers so no single point of compromise exists.
PRIVATE.ME is the only platform that combines information-theoretic payload security, hybrid post-quantum key exchange, and post-quantum digital signatures in a single stack.
| Capability | Tuta | Proton | Signal | Apple | PRIVATE.ME |
|---|---|---|---|---|---|
| Hybrid PQ key exchange | ✓ | — | ✓ | ✓ | ✓ |
| PQ signatures | — | — | — | —* | ✓ |
| Information-theoretic payload | — | — | — | — | ✓ XorIDA |
| Split-channel multi-provider | — | — | — | — | ✓ |
| No single point of compromise | — | — | — | — | ✓ |
| Harvest-now immune (payload) | — | — | — | — | ✓ |
| Agent-to-agent SDK / ACI | — | — | — | — | ✓ 68 ACIs |
| Computation on shares (MPC) | — | — | — | — | ✓ Xcompute |
*Apple CryptoKit supports ML-DSA (iOS 26) but iMessage PQ3 does not yet use it for message signing.
Three design decisions that separate PRIVATE.ME from every other secure communication platform.
Traditional E2EE wraps your message with a key and stores it with one provider. If that provider is breached, if the key is stolen, or if a quantum computer factors the key — everything is exposed. The security depends entirely on one assumption holding forever.
PRIVATE.ME splits your message into shares using XorIDA over GF(2). Each share is mathematically random noise. No single share contains any information about your message. An attacker must simultaneously compromise multiple independent providers — a categorically harder problem.
PRIVATE.ME secures all three cryptographic layers. The payload is information-theoretically immune (XorIDA). Key exchange is hybrid post-quantum (X25519 + ML-KEM-768). Authentication is dual-scheme (Ed25519 + ML-DSA-65). No other platform ships all three layers quantum-safe today.
Every message protected at every level of the protocol.
Last verified: April 2026
Competitor capabilities based on publicly available documentation.
Clean inbox. Provable security. Three layers of quantum safety. Free to start.
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