LetterlockPricing
How Letterlock compares
The table below compares tools that combine email with AI or strong privacy. Prices are approximate and may change.
| Tool | Price | Encryption model | Trains on data? | Jurisdiction | Best for |
|---|---|---|---|---|---|
| Proton Mail + Scribe | from $6.99/mo | Zero-access E2E | No | Switzerland | Max privacy, very limited AI |
| Tuta | $3 to $8/mo | Quantum-safe E2E | No | Germany | Future-proof encryption, no AI |
| Canary Mail | $3 to $10/mo | PGP + on-device AI | No | India / US | Some AI features, on-device only |
| alfred_ | $24.99/mo | AES-256 + TLS 1.3 | No | US | Full AI features, server-side trust |
| Superhuman | $30 to $40/mo | SOC 2 standard | Not disclosed | US | Speed, enterprise |
| Shortwave | $30 to $120/seat/mo | Standard encryption | Not disclosed | US | Team email, privacy unclear |
| Gmail + Gemini | from $19.99/mo | Google infrastructure | Claims no (Workspace) | US | On-demand writing help inside Gmail itself |
| Letterlock | €25/mo | TEE enclave + PII masking | No, open source | EU | Verifiably secure AI email (Gmail only) |
The key distinction: Letterlock's security is verifiable and uses attested AI providers, carefully checking that they don't store and cannot look at your data. The attestation report shows that the server runs the published open-source code, which can be verified. Other tools require you to trust they are telling you the truth.
What is included
- Automatic draft creation with email history search for context
- Google Calendar read, plus event creation from your sent mail when enabled
- Verifiably secure hosted models (Llama 3, Mistral, DeepSeek R1, Qwen)
- An optional per-account voice profile, so drafts sound are written with your writing style
- Optional Telegram notifications
- Optional daily inbox summary
- On-demand attestation: verify the server is running the published code at any time