Across Protocol was developed with the aim of creating a more efficient and secure bridge for Ethereum. It was designed to optimize capital efficiency and provide a bridging experience for users. The protocol has been audited by OpenZeppelin, a security audit firm in the blockchain space, to ensure its robustness and reliability. Over time, Across Protocol has evolved to include features such as a single liquidity pool, a competitive relayer landscape, and a no-slippage fee model, all of which contribute to its goal of providing efficient and secure cross-chain transfers.