For years, wrapped Bitcoin meant one thing: BitGo's WBTC. In late 2024, Coinbase shipped cbBTC and reset the conversation. In May 2026, Circle announced cirBTC, putting the two largest US-regulated crypto issuers head to head on the same product category. Both wrap native BTC 1:1. Both lean on institutional custody. Both target the same lending markets, DEX pairs, and treasury balance sheets. The differences are in custody design, transparency, chain footprint, and how each issuer plans to plug wrapped BTC into the rest of its stack.
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cbBTC is Coinbase Wrapped Bitcoin, an ERC-20 representation of BTC issued by Coinbase. It launched in September 2024, with native BTC held by Coinbase Prime as the underlying custodian. Supply has grown into the multi-billion dollar range across Base, Ethereum, and Solana.
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The thesis behind cbBTC was simple. WBTC had served DeFi well, but its custodian transition in 2024 created enough governance noise that DeFi protocols, including Sky (formerly MakerDAO) and Aave, paused or reconsidered exposure. Coinbase stepped in with a wrapped BTC backed by a public US exchange and its Prime custody arm. Per DeFiLlama, cbBTC supply sits in the roughly two to three billion USD range as of 2026, with Base and Ethereum holding most of the float and Solana growing.
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cirBTC is Circle Wrapped Bitcoin, announced May 2026 and live on a waitlist at circle.com/cirbtc. Like cbBTC, it is 1:1 backed by native BTC. Unlike cbBTC, Circle has stated reserves will be verifiable onchain rather than only through periodic attestation. cirBTC will launch on Ethereum and Arc, Circle's L1, first, with additional chain support to follow subject to regulatory approval.
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Circle positions cirBTC as an extension of the same compliance and transparency stack behind USDC and EURC. The same Circle Mint pipes that authorized participants use to create and redeem USDC are intended to support cirBTC, alongside integrations with Circle Gateway, CCTP, and Arc-native applications.
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The cleanest way to read the two is by axis: who issues, who custodies, where it lives, how transparency works, and how it plugs into each issuer's wider stack. The table below summarizes the public facts as of May 2026.

Both products lean on the same broad pitch, a US-regulated issuer holding native BTC against an onchain token. The execution differs. Circle's identity is shaped by USDC: a single-purpose issuer, no exchange business, MiCA-compliant in Europe, with reserve transparency as core marketing. Coinbase is a publicly traded US exchange with a custody arm, a wallet, a chain (Base), and a retail user base in the tens of millions.
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For a treasury or OTC desk, the choice is less about which logo is more trusted and more about which set of risks fits the mandate. cbBTC concentrates exposure on a single public exchange. cirBTC concentrates exposure on a single stablecoin issuer. Diversification across both, alongside WBTC and tBTC, is the practical institutional pattern.
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The cleanest difference Circle is drawing on its launch page is reserves verifiable onchain. WBTC and cbBTC both publish proof-of-reserve information, but verification still relies on off-chain attestations linking custodied BTC addresses to onchain supply. Circle has signaled that cirBTC will move closer to a fully onchain proof, in line with how Circle has handled USDC reserves attestation cadence.
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The detail to watch at launch is whether Circle publishes a real-time onchain feed of BTC custody balances paired with cirBTC supply, similar to how Chainlink Proof-of-Reserve works for WBTC, or whether the verification is structurally tighter. Until the contracts are live and audited, it is fair to call this a stated direction rather than a delivered feature.
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cbBTC sits on Coinbase Prime, the same NYDFS-regulated custody arm used by ETF issuers and corporate treasuries. That is a well-understood institutional setup with billions in assets under custody and an existing client base.
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Circle's BTC custody arrangements at launch have not been fully disclosed. Circle has historically used a mix of regulated banking and qualified custody partners for USDC reserves, and a similar pattern for cirBTC is plausible. For institutions, the diligence question is the same in both cases: bankruptcy remoteness, segregation, and the specific legal entity holding the BTC.
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cbBTC's chain mix tilts toward Coinbase's own ecosystem. Base is the largest pool, Ethereum is the institutional venue, and Solana picks up high-frequency DEX flow. That mix maps cleanly to Coinbase's product priorities: drive Base TVL, serve Ethereum DeFi, support Coinbase's Solana retail and institutional users.
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cirBTC's chain mix at launch maps to Circle's stack. Ethereum is the home for institutional DeFi. Arc, Circle's L1, gives Circle a native chain where USDC, EURC, and cirBTC all settle alongside compliance-aware tooling. As CCTP-style transport expands, cirBTC could become routable across the same fifteen-plus chains where USDC already moves, including Base. That overlap is where the two products will eventually compete most directly.
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cbBTC moved quickly into major lending markets. Aave listed cbBTC on Ethereum and Base, Morpho hosts cbBTC markets, and Sky has discussed cbBTC as collateral. The result is real borrow demand against cbBTC, which is the strongest signal for any wrapped BTC.
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cirBTC at launch will need to repeat that work. Circle's existing protocol relationships through USDC give it a head start. Aave, Morpho, Pendle, and Sky already integrate USDC at depth, and Circle's enterprise and protocols team has the relationships to move cirBTC listings forward when contracts ship. Expect the first wave of cirBTC listings to mirror the markets where USDC has the deepest liquidity.
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cbBTC charges no explicit mint or wrap fee for eligible Coinbase customers, recovering economics through Coinbase's broader exchange and custody business. The implicit cost is the spread customers pay to acquire BTC on Coinbase plus any redemption frictions.
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cirBTC fee structure has not been disclosed pre-launch. Circle's USDC mint and redeem pipes are fee-free for Circle Mint customers above thresholds, with banking and wire costs separate. A similar structure for cirBTC, where authorized participants face minimal protocol-level fees, would match Circle's wider playbook.
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Both Circle and Coinbase are US-headquartered, US-regulated, and operate inside the existing federal and state frameworks. cirBTC is described as launching "subject to regulatory approvals," which is consistent with how Circle has rolled out new products under both US and EU regimes. cbBTC launched without a separate, public regulatory milestone because Coinbase already operates under NYDFS for custody.
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For non-US institutions, the practical questions are MiCA classification in Europe, Travel Rule handling, and how each issuer treats sanctioned addresses. Circle's MiCA work for USDC and EURC suggests cirBTC will follow a similar, conservative path. Coinbase has taken a more case-by-case posture by jurisdiction.
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The honest answer is both, with sizing reflecting where each is strongest. cbBTC is the live, multi-billion option with deep Base and Ethereum lending markets. cirBTC, once live, will be the choice for desks already operating on Circle Mint pipes, holding USDC and EURC, or settling on Arc. Treasuries that already use Coinbase Prime for BTC custody have a natural fit with cbBTC. Treasuries with Circle as their primary stablecoin partner have a natural fit with cirBTC.
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For cross-chain settlement, Eco Routes can route cirBTC once contracts are live across supported chains, alongside USDC, EURC, and other major assets. That is orchestration, not issuance: Circle issues cirBTC, Coinbase issues cbBTC, and Routes moves either across chains based on best price and inventory.
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This comparison uses Circle's public cirBTC announcement and waitlist page (circle.com/cirbtc), Coinbase's cbBTC product documentation (coinbase.com/cbbtc), and DeFiLlama's wrapped BTC category for supply figures as of May 2026. All cirBTC details are pre-launch and reflect Circle's stated direction rather than shipped contracts. cbBTC details reflect the September 2024 launch and subsequent multi-chain rollout to Base, Ethereum, and Solana.
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