Mesh networking, zero-knowledge verification, and fully homomorphic encryption. So humans, devices, and AI agents can transact privately without trusted infrastructure or continuous internet.
Features
Send tokens from anywhere. OffChain routes your transaction via SMS with no data connection needed.
Type what you want. Swaps, sends, price checks handled instantly without switching apps.
Tap two phones together and crypto moves. Peer-to-peer NFC transfers with no internet, no QR codes, no addresses to type.
Buy on Amazon, eBay, and more directly with USDC. Powered by the x402 payment protocol. No card, no checkout, no middleman.
Your keys never leave your device. We never see or touch your funds.
Functional wallet in under 60 seconds. No paperwork, no KYC.
Fully usable without registration. Maximum privacy.
[01.Privacy Stack]
OffChain composes three well-studied cryptographic primitives into a single coordination layer that holds under blackouts, surveillance, and adversarial infrastructure.
Transport
OffChain reaches you through whichever channel is reachable, including when the internet is not. Signed transactions hop across SMS, BLE, LoRa, and Tor-style onion routing until one path lands. No central server, no single chokepoint.
[device] → BLE ┐
├─→ [relay] → chain
[device] → SMS ┘Lineage
Verification
Prove a transaction is valid without revealing who sent it, who received it, or how much moved. The chain learns nothing more than it needs to. Observers see traffic, not content. ZK shields the social graph between your wallets.
tx → [Groth16 prover]
│
▼
[proof only]Lineage
Computation
FHE lets the relay route, batch, and verify your traffic while it stays encrypted end-to-end. The infrastructure performs work on data it never sees in plaintext. This is what makes coordination between AI agents possible without leaking their state.
[encrypted] → compute
│
▼
[still encrypted]Lineage
No phone number. No email. No KYC. No telemetry.
Privacy / by default
[02.Operators]
OffChain is infrastructure, not a product. The same encrypted layer that lets a journalist pay under blackout also lets an AI agent settle with another agent. One stack. Three classes of operator.
Surveilled · Censored · Offline
Journalists, dissidents, refugees, and anyone whose government has flipped the switch. People who need money to move when the network does not.
Sensors · Meters · Edge nodes
Physical infrastructure that needs to transact for itself: machine-to-machine payments, micropayments for sensor data, autonomous billing for shared resources.
Autonomous · Encrypted · Composable
Agents that hold their own wallets, transact with other agents, and coordinate over the network without leaking their state. FHE keeps their reasoning private even from the relay carrying their traffic.
One stack · Three operator classes · Zero distinction at the protocol layer.
Infrastructure / by design
How it works
Your wallet is ready immediately. No sign-up or registration required.
Pick SOL, USDC, or any SPL token from your balance.
Paste the recipient's wallet address and the amount.
OffChain dispatches the transaction via SMS, even with zero data.
No internet? OffChain dispatches your transaction via SMS. It goes through regardless of connectivity.
Built-in AI Agent
A full AI agent lives inside your wallet. Swap, send, check prices. No browser, no dapp, no extra apps.
One app, everything included. The agent lives inside your wallet. No dapp switching, no wallet approvals. You type, it executes.
FAQ
Everything you need to know about OffChain and SMS-based crypto transfers.
When you hit Send, OffChain encodes your signed transaction into a compressed SMS payload and routes it through our relay network. The relay broadcasts it to the blockchain on your behalf.
When you hit Send, OffChain encodes your signed transaction into a compressed SMS payload and routes it through our relay network. The relay broadcasts it to the blockchain on your behalf.
Still have questions? Reach us on Telegram.
Download OffChain and start sending Solana transactions via SMS today.
Android APK · iOS installs as a web app