Bitcoin-DeFi startup BOB tops up funding to $21M as Castle Island, Anchorage join

Build on Bitcoin raised $21 million to unlock native BTC DeFi with a new bridge, hybrid layer 2 infrastructure and institutional investor backing.

Layer-2 blockchain network Build on Bitcoin (BOB) has raised $21 million in strategic funding rounds since December 2024, with $9.5 million secured in its latest round, according to a press release sent to Cointelegraph.

Many existing investors have increased their financial commitments in the latest $9.5 million strategic round, including exiting investor Castle Island, along with new strategic investors Anchorage, Amber Group and sats Ventures.

Nic Carter, founding partner of Castle Island, told Cointelegraph why they have decided to double down on their investment:

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