BTC.b: Bitcoin for DeFi. Zero fees.
BTC.b is the onchain Bitcoin asset. It’s 1:1 backed, available with zero fees, and secured by a decentralized Security Consortium. Live on Ethereum, Avalanche, MegaETH, Katana, Stable, and Monad.
Bitcoin, onchain. Nothing added.
BTC.b is a 1:1 backed onchain Bitcoin asset. For every BTC.b in circulation, one BTC is held in reserve, verifiable in real time via Chainlink Proof of Reserve.
Unlike yield-bearing assets, BTC.b carries no yield assumptions and no lock-up. It is simply BTC, moved onchain. Hold it, trade it, provide liquidity, or use it as collateral across any supported chain, with no assumptions baked in.
The most decentralized and transparent Bitcoin.
Keep 100% of your position.
No bridging fees, ever. BTC.b was designed to move cleanly. You receive 1.0000 BTC.b for every 1 BTC. Most bridges take 0.1–0.3%. BTC.b takes nothing.
Decentralized custody. No single point of failure.
BTC.b is secured by Lombard's 14-member Security Consortium, independent nodes running BFT consensus. No single entity can move, freeze, or block your Bitcoin.
Verify. Don't trust.
BTC.b reserves are verified continuously by Chainlink Proof of Reserve, onchain, in real time, verifiable by anyone. Not quarterly attestation letters. Not trust-me disclosures.
View transparency pageDeposit BTC. Get BTC.b. Use anywhere.
Deposit native BTC
Send BTC to your Lombard bridge address. Your deposit is held in reserve and verified by the 14-member Security Consortium using BFT consensus.
Receive BTC.b: 1:1, zero fees
BTC.b is minted to your wallet on the destination chain. 1.0000 BTC becomes exactly 1.0000 BTC.b.
Use BTC.b across DeFi
BTC.b is composable across DeFi protocols on multiple chains: as collateral, in liquidity pools, or held as a neutral Bitcoin position. Redeem back to native BTC at any time.
Bitcoin. On leading chains and protocols.
BTC.b gives platforms access to Bitcoin. Available via the Lombard SDK or as a direct whitelabel integration. No bridge infrastructure to build. No custody liability to manage.
Give your users Bitcoin across chains with zero fees and 1:1 Chainlink-verified backing.
Built by Ava Labs. Secured by Lombard.
BTC.b was originally built by Ava Labs. In October 2025, Lombard acquired BTC.b and migrated it to the same institutional infrastructure that has onboarded $3B+ in Bitcoin: independent nodes, BFT consensus, HSM-backed key management. No single entity controls the keys.
Bitcoin. On any chain. No fees.
Zero fees. Chainlink-verified 1:1 backing.
Decentralized Security Consortium.
Questions, answered.
Everything you need to know about BTC.b: how it works, how it’s backed, and where it’s live.
BTC.b is Bitcoin for DeFi, live across 6 chains. Originally built by Ava Labs and now operated by Lombard, it’s the most friction free way to move Bitcoin into the onchain financial system, with zero fees and 1:1 Chainlink-verified backing.
Every BTC.b in circulation is backed 1:1 by BTC held in reserve, verifiable onchain in real time via Chainlink Proof of Reserve. No single entity controls the keys.
Moving Bitcoin onchain with BTC.b incurs no minting or bridging fees. You receive 1.0000 BTC.b for every 1 BTC, instantly.
BTC.b is live across 6 chains, including Ethereum, Avalanche, MegaETH, Katana, Stable, and Monad, with more networks added over time.
Yes. BTC.b can be whitelabeled for any protocol or chain, making it simple to give your users Bitcoin under your own brand, with seamless UX.