Product · SMS Pay
Pay from any phone.
The SMS-native side of Hvisk. Type a payment into your messages app, hit send, and your phone signs a zero-knowledge proof, queues it for the next relayer, and settles on Solana the moment it gets through.
SMS Pay is built for the 2.6 billion people without reliable mobile internet, for relief operations in places where data networks fail first, and for anyone who simply wants a payment that does not need an app installation or a wallet UI to complete.
What you get.
Works offline.
Compose, sign, and queue payments without internet. The moment you have cellular signal, the message goes out.
ZK proof per text.
Every payment carries a compact zero-knowledge proof. Amounts and balances are encrypted on-chain.
No app required.
Works with the default messages app on any phone. Smartphone, flip phone, anything that can send a text.
Sub-2-second settlement.
When the message reaches a relayer, the transfer broadcasts and finalises on Solana in under two seconds.
How a payment looks.
From your messages app, you write to +1 (555) 0142:
PAY @lena 25 USDC priv:full
Your device generates an Ed25519 signature, builds the ZK proof, and bundles everything into a 160-character SMS. A relayer picks it up, validates the signature, injects a fresh Solana blockhash, and broadcasts the proof-wrapped transaction.
Carriers supported.
We operate gateways in the United States, the United Kingdom, Kenya, Nigeria, India, and the Philippines at launch, with further corridors planned. Roaming numbers and SIP trunks are supported for enterprise customers.