Cryptogram is a messenger where every message is a crypto transaction on the Solana blockchain. You write a message, confirm it with a tap of your hardware wallet, and it is delivered through the blockchain — not through a company's server.
Cryptogram fills the gap between ordinary messengers and quantum communication. In ordinary messengers your correspondence is kept on a server: it can be read, blocked, altered or even deleted — which makes it legally unreliable as evidence. Quantum links cost a fortune and exist only between a few points in a country. In Cryptogram every message is encrypted, signed by the sender and written to the Solana blockchain forever.
How it works
- 01WriteOpen the web app in your browser and type a message to a @username or a wallet address.
- 02SignTap your hardware wallet card on the phone to confirm. Your keys never leave the card.
- 03SendThe message travels as a single blockchain transaction.
- 04ReadThe recipient's app picks it up from the blockchain and shows it in the chat.
Pricing — four paid services
- MESSAGE≈ $0.02Up to ~600 Latin characters. Long ones go in up to 4 parts, +$0.01 per part: ~2,430 characters for ≈ $0.05 (fewer with Cyrillic or emoji).
- REGISTRATION$0.99Once: your encryption keys, public key (certificate) on the blockchain. Free* with an invite from a Premium ★ member.
- USERNAME$9.99Once, optional: a unique @username and your link app.cryptogram.chat/@name.
- ★ PREMIUM$44.99Once, forever (Telegram Premium: $44.99 a year): free* invites for friends, a free* username, messages for $0.01 — 50% of the price. Settings → Upgrade status.
* Excluding the Solana network fee — usually under 1 US¢.
What you need
- A browser — no installation required.
- A Solana wallet — best with Tangem: your keys stay on the card, every message is confirmed by a tap. Get 10% off via the link in the app (Wallet tab). Solana is not enabled in Tangem by default: Tangem → Manage tokens → Solana. Phantom, Solflare, Trust Wallet and others work too.
- A little SOL on the wallet — for the one-time registration ($0.99, free* by invite) and a small fee per message.
Important: messages are encrypted, but they stay on the blockchain forever. Who wrote to whom, and when, is visible to everyone; the text is not.