Function FBTC vs Lorenzo enzoBTC: custody and transparency (2026)

Both products wrap Bitcoin for on-chain use, and both carry risks beyond holding BTC directly. Function FBTC has the higher listed TVL, at about $666 million compared with about $483 million for enzoBTC. Function also names Antalpha Prime, Mantle and Galaxy Digital as core contributors and claims 30+ integrations, including vaults on Ethereum and Solana. Lorenzo presents enzoBTC as part of its institutional-grade on-chain asset management protocol and links to documentation, GitHub, a team page and an ecosystem page. Its actual usage beyond the Bitcoin chain listing is not clear. Function’s project score for features is 7.5, compared with 6 for Lorenzo, but that does not remove the need to check how either token is issued, held and redeemed.

Function provides more visible reserve and audit references: it lists two audits and links to an Audits page, a Proof of Assets page, a Dune dashboard and a Risk Disclosure Statement. However, audit details and custody arrangements are not public in the information available here, so check the reports and official documentation. Lorenzo links to audits from its homepage, but no audits are listed for enzoBTC on DefiLlama. That does not establish that the token has never been audited; open the reports and verify who performed them, what was covered and whether issues were fixed. Lorenzo does not state who holds the underlying BTC or what happens if a custodian or contract fails. Both tokens depend on the issuer, custody arrangements and smart contracts. Function vault use adds third-party lending-market and strategy-manager risks, while wrapped BTC itself adds risks beyond ordinary Bitcoin ownership.

Minting and redemption fees are not published for either token. Function also does not publish swapping or bridging fees, while Lorenzo does not publish charges inside its app. Check each project’s official documentation and app before transacting, and include relevant network fees in your cost assessment. If you use Function vaults, third-party vaults or lending markets may set additional terms and costs. Function displays estimated APY ranges for vaults; these are not guaranteed returns, and the underlying protocols and managers bring their own risks. Lorenzo’s homepage does not explain enzoBTC redemption terms or limits. Do not assume either token can be redeemed on the same terms, at the same cost or with the same eligibility requirements as the other. Confirm the current process and any applicable legal or access requirements before depositing BTC.

Choose Function FBTC if you place weight on its higher listed TVL, named core contributors, stated integrations and published reserve-transparency resources. Its two listed audits are a useful starting point, not a guarantee of safety; check their scope and the custody details. Function’s site can also show blank, zero or NaN fields, so some live figures may be difficult to verify. Consider enzoBTC if you specifically want to assess Lorenzo’s wrapped Bitcoin product and are prepared to investigate the audit links, custody model, redemption terms and supported use cases yourself. Its TVL is still substantial, but those details are less clear. Neither option is equivalent to holding Bitcoin directly, and neither publishes fees. If you cannot verify the custody and redemption arrangements you need, avoid treating TVL alone as a reason to choose either token.