Circle launched cirBTC on Ethereum this week, a wrapped Bitcoin token that's backed 1:1 by native BTC held in a segregated account. The move puts the stablecoin issuer into direct competition with Coinbase's cbBTC and the incumbent WBTC, leaning on its institutional brand and existing USDC ecosystem to carve out a slice of the wrapped Bitcoin market.
How cirBTC works
CirBTC is a fully reserved token — each cirBTC is backed by one native Bitcoin held by a Circle entity, with those reserves kept separate from corporate assets. The token offers onchain reserve visibility and proof-of-reserve, meaning anyone can verify the backing. It's also integrated with Circle Mint and USDC workflows, so users who already operate in Circle's orbit can move between USDC and cirBTC without extra friction.
The competitive landscape
Circle isn't the first to try this. Coinbase's cbBTC is already available on Base, Ethereum, Solana, and Arbitrum, backed 1:1. WBTC remains the market incumbent with public reserves. But Circle's advantages are its institutional brand — the same trust that powers USDC — and the infrastructure it's built around stablecoin finance. That includes Arc, a stablecoin finance infrastructure platform that Circle plans to support cirBTC on.
Circle is positioning cirBTC as institutional-grade collateral for DeFi lending markets, OTC desks, and settlement flows. That's a deliberate pitch to the kind of players who already use USDC for treasury operations or yield strategies. If the token gains traction, it could give DeFi protocols a third major wrapped Bitcoin option — one that comes with Circle's compliance and transparency track record.
Circle says it plans to integrate cirBTC with Arc, its stablecoin finance infrastructure, though no timeline has been given. The token launches on Ethereum for now; support for other chains hasn't been announced. For a market that's used to WBTC dominance and Coinbase's recent expansion, the real test will be whether liquidity providers and protocols actually switch.
