BOB ("Build on Bitcoin") is a Hybrid Layer-2 blockchain that combines the best of Bitcoin and Ethereum to create the home for Bitcoin DeFi. The unique Hybrid L2 model merges the strengths of both ecosystems—Bitcoin's security and dormant capital, with Ethereum's DeFi innovation and versatility. By positioning BTC as the backbone of a new decentralized finance system, BOB can unlock new use cases and trillions in BTC liquidity. BOB uses BitVM to inherit security from Bitcoin and create trust-minimized bridges between BOB, Bitcoin, Ethereum, and other L1s. As a result, the Hybrid L2 does not need to rely on third-party bridges for interoperability, concentrating liquidity around Bitcoin instead of fragmenting it across chains.
BOB is backed by leading investors such as Castle Island Ventures, Coinbase Ventures, Ledger Cathay Ventures, and IOSG.
BOB’s mainnet Phase 1 has been live since May 2024, attracting over 100 projects, 320k unique users and $250m+ in TVL.
There are 100+ projects live or building on BOB, notably: