The verifiable data network.
Willow is the first blockchain indexer to prove its data is real, complete, and correct.
Apps & smart contractsWillowindex · store · proveBlockchainsApp dataAPIs
How it works
Every block is proven.
- IndexWillow reads every block across multiple chains and pulls out the events each app needs.
- ProveEach block gets a proof that every record is on the chain, none are left out, and every derived value is correct.
- StoreThe data and its proofs live on Willow, and every query comes back with a proof.
- VerifyProofs fold into one that smart contracts on other chains can check cheaply.
Use cases
Built for anyone who moves money on chain data.
Verified on EthereumReward payoutsEvery pool event behind a live Merkl campaign, proven and checked on mainnet.Read the post →Verified on EthereumStaking accountingLido's exact validator set and balance, verified in one transaction.Read the post →Verified on EthereumCross-chain dataA window of Base events verified on Ethereum, with no oracle or relayer.Read the post →For institutionsTokenized fundsA fund's books checked against the chain, with a proof its auditors can verify.Read the post →LiveVault analyticsEvery number on YieldNest's vault dashboard comes with a proof.Open the dashboard ↗
Why it matters
Billions already move on indexed data.
$3.27BLido staking rewards
$1.8B+Merkl incentive distributions
$60M+Gitcoin grants funding
When that data is wrong, the money still moves. In April, KelpDAO released $292M for a burn that never happened. Since then, at least eight more exploits have paid out about $32M against deposits that weren't real. Incident report ↗
Cumulative public figures, checked Sept 21, 2026