B2 Network is a Bitcoin Layer 2 with an EVM-compatible, zkEVM ZK-rollup design that settles toward Bitcoin and charges gas in BTC. Its native token is B2.
B2 Network, also styled BSquared, launched its mainnet in April 2024 as a Bitcoin Layer 2 that runs a zkEVM rollup, stays EVM compatible, and uses BTC to pay gas. Here is how it works and what it is used for, not the price.
Total value locked (DeFi)
$2.3M
Value locked in DeFi protocols on B2 Network. Updated Jun 8, 2026. Source: DefiLlama.
B2 Network executes transactions in an EVM-compatible environment off the Bitcoin base layer and uses zero-knowledge proofs to verify batches of transactions. The design commits proof data toward Bitcoin and combines ZK proofs with a challenge process so the rolled-up state can be checked. Batching transactions into proofs keeps per-transaction costs lower than transacting directly on Bitcoin.
Consensus: zkEVM rollup settling to Bitcoin
B2 Network executes transactions in an EVM-compatible environment off the Bitcoin base layer and uses zero-knowledge proofs to verify batches of transactions. The design commits proof data toward Bitcoin and combines ZK proofs with a challenge process so the rolled-up state can be checked. Batching transactions into proofs keeps per-transaction costs lower than transacting directly on Bitcoin.
Bitcoin Layer 2
B2 Network runs an execution layer above Bitcoin and commits zero-knowledge proof data toward the Bitcoin base layer.
zkEVM rollup
The network uses a zkEVM rollup, so it can run EVM contracts while verifying batches of transactions with zero-knowledge proofs.
BTC as gas
Transaction fees on B2 Network are paid in BTC. The B2 token is used for utility and protocol roles within the ecosystem.
Proof and challenge model
B2 pairs zero-knowledge proofs with a challenge process so that committed Layer 2 state can be checked against the data settled toward Bitcoin.
Ecosystem & usage
What B2 Network is used for.
The network hosts EVM-compatible applications that connect Bitcoin liquidity with familiar tooling.
B2 Network is a Bitcoin Layer 2. It processes transactions off the Bitcoin base layer and commits zero-knowledge proof data toward Bitcoin.
What token pays for gas on B2 Network?
Gas on B2 Network is paid in BTC. The B2 token is used for utility and protocol roles within the ecosystem.
Is B2 Network EVM compatible?
Yes. B2 Network runs a zkEVM environment, so EVM contracts and Ethereum tooling can be used on it.
When did B2 Network launch?
B2 Network launched its mainnet in April 2024.
Can I hold B2 in Zypto App?
Not yet. B2 isn't in Zypto App at the moment. You can hold it in any self-custodial wallet, and you can ask us to add B2 Network using the "Request B2 Network" button above.
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