Messages only the keyholder can read.
No phone number. No email. No account to hack. Your identity is a seed phrase that only you hold — so not even we can read what you send.
- No phone or email
- Forward secrecy
- Disappearing messages
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Private by construction, not by promise.
No phone or email
Your account is 12 words and a pair of keys — nothing personal to leak, lose, or be sold. There's no profile to mine and no password to steal.
- Phone number
- Email address
- 12-word seedocean · velvet · maple …
End-to-end by default
Every message is sealed on your device and opened only on theirs. The server in the middle forwards a box it can never open — it only ever holds ciphertext.
Disappearing & view-once
Set a timer, or send media that opens a single time. When it's spent, the encrypted blob is deleted for good — there's no copy left for the server to resurrect.
Encrypted groups
Group names, members, and messages stay sealed. Each message is locked individually to every recipient — same end-to-end guarantee, just fanned out.
Sealed media
Photos and files are locked in your browser with a one-time key before a single byte leaves. The store holds an unreadable blob; the key rides inside the message.
Yours on every device
The same 12 words rebuild your exact identity anywhere. Add a device or recover a lost one by typing your seed — there's no central account to reset.
Locked on your device. Opened on theirs. Never in between.
Glyph builds on the same primitives Signal uses — X25519, Ed25519, XChaCha20-Poly1305, and a Double Ratchet that gives every message its own key. We didn't invent the cryptography. We wired the trusted parts together and kept the server blind.
- 01Type “hello”
- 02Seal with their key
- 03Sign with yours
- 04Server stores ciphertext
- 05Verify signature
- 06Open · show “hello”
What the server can — and can't — see.
Stays sealed
- Message contents — always ciphertext
- Group names, photos, and events
- Your contact list and petnames
- Past messages, even if a key leaks later
Still visible
- That key #A1B2 messaged key #C3D4, and when
- Who belongs to a group (the roster)
- That you connected to the server at all
Glyph protects what you say, not the bare fact that you said something. We're clear-eyed about the difference — read the full threat model.