Across Protocol is an optimistic cross-chain bridge offering zero slippage for asset transfers. Fly is aggregation infrastructure for DEXs, LSTs, and chains, enabling access to multiple liquidity sources. Across suits users who need direct, low-slippage bridging, while Fly suits those seeking aggregated liquidity across various protocols and chains.
| Token Price | — | — |
| 24h Change | — | — |
| Market Cap | — | — |
| TVL | $19.5MDefiLlama | — |
| MCap Rank | #647 | #5464 |
| Total Raised | $51.0M | $4.6M |
| Founded | 2021 | 2022 |
| Stage | — | — |
| X / Twitter | 105K | 172K |
| GitHub Stars | 143 | — |
| Chains | arbitrumbaseboba | ethereumsonic |
| Tags | Bridge, Infra, Polygon Ecosystem | DeFi, DEX Aggregator, DEX |
Across is an optimistic cross-chain bridge that uses UMA's optimistic oracle and bonded relayers to enable fast, capital-efficient transfers between rollup chains and Ethereum mainnet. It features a single liquidity pool, competitive relayer landscape, and no-slippage fee model.
Fly (previously Magpie Protocol) is an aggregation infrastructure for DEXs, LSTs and chains, providing cross-chain bridge functionality and optimized swap routing. It is integrated with projects like FlakeProtocol and leverages fast, low-cost settlement networks to deliver best execution prices.