Across is an intent-based cross-chain bridge using UMA's Optimistic Oracle, bonded relayers and single-sided liquidity pools to settle transfers across 30+ EVM and non-EVM chains in ~2 seconds.
A relayer fronts your funds in seconds — settlement catches up later
Walk the lifecycle of a cross-chain transfer: deposit, relayer fill, UMA verification, and origin-pool reimbursement.
You deposit USDC into the SpokePool on the origin chain and sign an intent specifying what you want delivered on the destination chain. Nothing is bridged yet — you've simply broadcast a request.
Drag to resize the transfer: larger amounts earn a tighter fee rate but take marginally longer to source relayer capital.
Live signals detected by Sentinel monitors across all five risk classes.
See each alert's affected component, root-cause analysis, and recommended action. Pro members get the full risk breakdown for every protocol.
Cross-chain bridges typically rely on multisigs, lock-and-mint wrapped assets, or slow finality, exposing users to either custody risk, illiquid wrapped tokens, or 7-day exit delays.
Across uses bonded relayers to front native assets on the destination chain in seconds, with UMA's Optimistic Oracle settling claims trustlessly — no multisig signers control user funds in transit and no wrapped tokens are minted.
First production-scale intent-based bridge: single-sided LP model on Ethereum + permissionless relayer competition delivers ~2-second fills with no liquidity fragmentation across chains.
Across Protocol is a Bridge protocol operating on Ethereum, Arbitrum, Optimism, Base, Polygon, Solana, zkSync Era, Linea, Mode, Blast, World Chain, Lisk, Scroll, BSC. Across is an intent-based cross-chain bridge using UMA's Optimistic Oracle, bonded relayers and single-sided liquidity pools to settle transfers across 30+ EVM and non-EVM chains in ~2 seconds.
DeFi Sentinel rates Across Protocol A with a safety score of 76/100, indicating low-to-moderate risk. The score reflects five risk dimensions: smart contract & technical risk, economic design & market risk, governance & centralization, sustainability & competitive position, and reputation & social trust. Across Protocol has 2 audits on record. As with all DeFi protocols, residual risk remains and users should review the full risk breakdown before depositing.
Across Protocol has a DeFi Sentinel safety score of 76/100 (rating A), last updated May 22, 2026. The score is computed across smart contract & technical risk (30%), economic design & market risk (25%), governance & centralization (20%), sustainability & competitive position (15%), and reputation & social trust (10%).
Across Protocol is deployed on Ethereum, Arbitrum, Optimism, Base, Polygon, Solana, zkSync Era, Linea, Mode, Blast, World Chain, Lisk, Scroll, BSC.
Yes. Across Protocol has 2 audit reports on record from firms including OpenZeppelin, OpenZeppelin. Audit reports and dates are linked under the Resources tab on this page.
