About
Senddy.

Cash never announced what you had or where it went. A bank statement is confidential. A typical onchain wallet is the exception: anyone can read its balance and every payment it has ever made.

Senddy makes privacy the normal state of onchain money again. Not as a niche tool for experts, but as something built into the apps people already use, so they keep their money private without learning anything new.

Senddy is a platform. Apps integrate one SDK and their users can send, swap and earn with balances and activity kept off the public ledger. Apps set their own fee on every transaction and earn on it.

Private payments. Send and receive without showing amounts, balances or who paid whom.

Private swaps. Trade between assets in one transaction, without showing anyone what you hold before or after.

Private yield. Balances earn while they sit, through a strategy set for each asset, and stay private while they do.

Money moves in and out on eleven networks, below. Private balances are held on Base and Robinhood Chain.

Senddy is also an app. The Senddy account is built on the same layer any developer can use, and HOODS on Robinhood Chain runs on it too.

Users bring money in from the networks they already use, and send it out to any of them. Whatever they deposit lands in one private balance.

• BaseBase. Deposit, withdraw and hold privately
• EthereumEthereum. Deposit and withdraw USDC
• SolanaSolana. Deposit and withdraw USDC
• ArbitrumArbitrum. Deposit and withdraw USDC
• OptimismOptimism. Deposit and withdraw USDC
• PolygonPolygon. Deposit and withdraw USDC
• BNB ChainBNB Chain. Deposit and withdraw USDC
• AvalancheAvalanche. Deposit and withdraw USDC
• HyperliquidHyperliquid. Fund and withdraw a trading account
• LighterLighter. Withdraw to a trading account
• Robinhood ChainRobinhood Chain. Deposit, withdraw, swap and hold privately

Private balances are held on Base and Robinhood Chain. Every other network bridges in and out through Relay: a deposit arrives as a private balance, usually within a minute, and a withdrawal leaves from it. USDC moves on all of them, and USDG on Robinhood Chain. Lighter takes withdrawals; deposits from Lighter go through the user’s own wallet.

Money in a Senddy pool is held as encrypted notes that only their owner can read. Each note is a number of shares of an asset in the pool.

When someone sends, swaps or withdraws, their device makes a zero-knowledge proof: a short piece of math that shows the transaction is valid without revealing the amount, the balance or the counterparty. Their keys never leave the device.

A secure enclave checks the proof and signs an attestation, and the pool contract accepts the transaction only with that signature. A relayer submits it, so users never need to hold gas.

Each asset’s strategy puts idle funds to work, and its earnings raise the value of every share, so balances grow without anything about them appearing onchain.

Non-custodial. Funds are held by the pool contracts, not by Senddy. Spending keys are derived on the user’s device and never sent anywhere.

Verifiable. The pool contracts are public and source-verified, and every note is anchored to a Merkle root anyone can check.

Hardware-isolated verification. Proofs are checked inside a secure enclave whose signing key lives in a hardware security module.

Senddy keeps money confidential from the public, not from the law. It is built for legitimate use, and two layers of screening keep bad actors out.

Onchain screening. Every deposit is checked against sanctions oracles by the pool contract itself. Flagged addresses can’t get in.

Offchain screening. Activity is risk-checked against industry intelligence before it’s processed.

Users can share a read-only view key with an accountant or auditor whenever they need to. We respond to valid legal process.

Senddy is free to build on and free to start using. There are no plans, no monthly fees and no minimums.

Senddy takes a small fee on each operation: about $0.05 on transfers, deposits and withdrawals, and 0.15% on swaps. Apps can add their own fee on top. Gas is always covered.

General. hello@senddy.com

Developers. developers@senddy.com

Security. security@senddy.com

Legal. legal@senddy.com