Firefish Review 2026
Firefish is a non-custodial, peer-to-peer Bitcoin-backed lending marketplace. Collateral sits in a 3-of-3 multisig escrow on Bitcoin L1 — Firefish never takes custody, and loans cannot be rehypothecated.
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Key Details
Firefish Ratings Breakdown
What Is Firefish?
Firefish is a non-custodial, peer-to-peer Bitcoin-backed lending marketplace founded in 2022 and headquartered in Prague — which puts it in the middle of one of the most concentrated Bitcoin engineering clusters in the world. SatoshiLabs (the team behind Trezor hardware wallets), Braiins (operator of Slush Pool, the oldest Bitcoin mining pool), General Bytes and Coinmate are all Prague-based, and that local context is worth pointing out because Braiins is a disclosed investor in Firefish: it led the $1.8M seed round in 2024 alongside Prague VC firm Miton C and took roughly a 15% stake. The platform sits in an interesting middle ground between traditional CeFi lenders and DeFi protocols: it is a regulated company (registered under the EU's Markets in Crypto-Assets Regulation in the ESMA Crypto-Asset Service Provider register), it requires KYC, and it operates a managed marketplace where loans are funded by individual investors rather than a platform liquidity pool. What it deliberately is not, however, is a custodian. Your Bitcoin collateral is locked in a 3-of-3 multisignature escrow on Bitcoin's base layer, and Firefish — by design — cannot move it unilaterally. The platform has scaled to over $100M in cumulative loan volume and tens of thousands of users across the EU and globally.
How Firefish Loans Work
As a borrower, the flow is: you sign up, complete KYC, and choose between a standard loan (where investors bid on your loan request at a market-driven rate) or an Instant Loan (auto-matched at a pre-set rate, typically funded in around 2–3 days). Once matched, you send your Bitcoin to a one-time on-chain escrow address that you co-construct with the platform. Under the hood this is a 3-of-3 multisig output with keys held by (1) a Price Oracle operated by Firefish, (2) a Payment Oracle operated by Firefish, and (3) you, the borrower — though your key is ephemeral: you sign a set of pre-built closing transactions covering every possible outcome (repayment, liquidation, disaster recovery) and then discard the key. From that moment on, your Bitcoin can only move along one of those pre-authorised paths. The lender then sends your funds directly to your bank or stablecoin wallet — EUR, CZK, CHF, or PLN if you are in one of Firefish's 34 fiat-supported countries (EEA + UK + Switzerland + Andorra + San Marino), or USDC / USDT on Ethereum if you are outside those 34, which includes US borrowers. You repay at maturity — terms run from 3 to 24 months — and the Payment Oracle co-signs the repayment transaction that returns your BTC to your wallet. If you need to repay early, you can request it (subject to investor approval). If you do nothing, the disaster-recovery transaction unlocks one month after the maturity date, giving you a way to reclaim your BTC even if Firefish goes silent.
Firefish Interest Rates
Borrower rates start from around 5% APR and are market-driven — investors on the other side of the marketplace set the price by bidding on loan requests. Realistic effective rates in 2026 typically sit in the 5% to 13% range depending on loan size, duration, and investor demand at the time. The Instant Loan product has a pre-set rate so you don't need to wait for a match. On top of the interest rate, Firefish charges a single platform fee — a 1.5% per-annum origination fee on the loan notional, deducted automatically from your Bitcoin collateral during the locking phase rather than billed monthly. There are no recurring account fees, no monthly platform fees, and no withdrawal fees on top of that, though you do pay standard Bitcoin network fees on the escrow deposit and the closing transaction at the end of the loan — those are unavoidable on-chain costs, not Firefish margin. Early repayment is possible but requires the investor on the other side to agree, since they were expecting yield for the full term; in practice many investors will accept the principal back early, but it is not unconditional.
Is Firefish Available in the US?
Firefish is available to US residents. The United States is not on Firefish's published list of ineligible countries (the ineligible list is largely sanctioned and high-risk jurisdictions), and US borrowers can take out loans on the platform using the same 3-of-3 multisig escrow as everyone else. The catch is that Firefish does not currently support USD fiat rails — US borrowers receive their loan in USDC or USDT (Circle and Tether stablecoins on Ethereum) rather than US dollars to a bank account. For most borrowers this is a minor practical inconvenience (USDC and USDT trade 1:1 with USD on every major exchange and on-ramp) rather than a true blocker. The 34 countries on Firefish's fiat-supported list — the EEA plus the UK, Switzerland, Andorra and San Marino — can additionally choose EUR, CZK, CHF or PLN payouts directly to a bank account.
Security & Safety
Security is the entire point of Firefish and where it differentiates most sharply from custodial CeFi competitors. Three things follow from the non-custodial 3-of-3 multisig model. First, Firefish cannot rehypothecate your Bitcoin — there is no policy promise here, it is a property of the Bitcoin script enforced by the network itself. The collateral cannot be lent out, traded, used to backstop the platform's balance sheet, or pledged anywhere else, because no two of the three keys ever exist together. Second, every possible loan outcome (repayment, liquidation, disaster recovery) is pre-signed by you before you destroy your ephemeral key, so the universe of where your BTC can go is fixed and inspectable at origination. Third, the disaster-recovery transaction has a one-month timelock past the maturity date and requires no oracle signatures — it is your independent escape hatch if Firefish disappears or the oracles become unresponsive. The protocol is open-source and published on GitHub, so the multisig and recovery logic is auditable. The honest trade-off: the Price Oracle and Payment Oracle are both currently operated by Firefish, so a malicious or compromised Firefish could (within the rules of the protocol) trigger an unjustified liquidation or refuse to co-sign a legitimate repayment. The disaster-recovery timelock and the deterministic nature of the escrow bound this risk, but they do not eliminate it. Firefish has indicated that oracle decentralisation is on the roadmap; at the time of writing, the trust model is "trust-minimised," not trustless. Firefish is registered under MiCA in the ESMA Crypto-Asset Service Provider register, which adds an EU regulatory layer on top.
Pros and Cons
Pros
- Non-custodial — BTC sits in a 3-of-3 Bitcoin L1 multisig escrow Firefish cannot move unilaterally
- No rehypothecation — collateral is not lent, traded or re-pledged to fund the platform
- Genuine peer-to-peer marketplace — loans are funded by other users, not a platform liquidity pool
- MiCA-registered with the ESMA Crypto-Asset Service Provider register
- Open-source protocol — escrow logic and recovery scripts published on GitHub
- Disaster-recovery transaction — borrower can reclaim BTC after a 1-month timelock if oracles become unresponsive
- Competitive starting rate (from 5% APR, market-driven by investor bids)
- Transparent single-line fee structure — 1.5% p.a. origination fee on top of interest; no recurring platform fees, no monthly account fees, no withdrawal fees beyond Bitcoin network costs
- 4.8 / 5 rating on Trustpilot at the time of writing
- Top-up collateral feature to avoid liquidation in a bear market
Cons
- BTC only — no altcoin or stablecoin collateral accepted
- Conservative 50% LTV — capital-inefficient versus 70–90% LTV CeFi competitors
- Fixed-term loans (3–24 months) — no open-ended credit line
- 1.5% p.a. origination fee deducted from BTC collateral at loan setup — on top of the market interest rate
- USD fiat rail not supported — non-EEA borrowers (including US residents) receive their loan in USDC or USDT instead of local currency
- Price and payment oracles are currently operated by Firefish — partial trust dependency remains
- KYC required — not a no-KYC option
- Smaller and younger than Nexo, Aave or Ledn — less operational history to evaluate
Who Is Firefish Best For?
Firefish is best for Bitcoin holders who watched Celsius, BlockFi, Voyager and Genesis collapse in 2022 and decided they were never going to hand custody of their BTC to a lender again — and who want either a direct fiat payout to a European bank account or a USDC / USDT stablecoin loan they can route anywhere. It is the natural fit for European borrowers given the direct EUR / CZK / CHF / PLN rails, and a strong choice for US Bitcoin holders who are comfortable receiving the loan in USDC or USDT instead of USD. It is less suitable if you hold altcoins (BTC only), need maximum LTV (50% is conservative), specifically need a direct USD bank deposit, want an open-ended credit line that runs indefinitely, or prefer the absolute lowest possible rates — Firefish trades a few percentage points of APR for a structurally different custody model, and that trade-off has to be worth it to you.
Firefish vs Alternatives
Final Verdict
Firefish earns a 8.9/10 in our review — placing it among our top-rated platforms in 2026 alongside Aave and Nexo, and earning a Top Pick on the homepage. The non-custodial 3-of-3 multisig escrow on Bitcoin L1 is the most structurally credible answer to the "what happens to my collateral if my lender fails" question that any CeFi-adjacent platform has shipped to date. The MiCA registration, open-source protocol, peer-to-peer marketplace model, and 4.8 Trustpilot rating at the time of writing all reinforce the security claim with public, verifiable evidence. The deductions are real and worth being honest about: 50% LTV is conservative, the platform is BTC-only, oracles are still Firefish-operated (so the model is "trust-minimised," not trustless), terms are fixed rather than open-ended, the 1.5% p.a. origination fee sits on top of the headline interest rate, and US borrowers are limited to USDC / USDT payouts rather than direct USD. For Bitcoin holders — European or American — who want loan liquidity without handing over custody of their collateral, Firefish is currently the most differentiated option on the market.
Frequently Asked Questions
Is Firefish non-custodial?
Yes. Your Bitcoin collateral is locked in a 3-of-3 multisig output on Bitcoin's base layer, with keys held by a Price Oracle, a Payment Oracle, and you (a one-time ephemeral key you destroy after signing the closing transactions). Firefish alone cannot move your Bitcoin because the multisig output requires all three signatures and Firefish only ever controls two. This is enforced by Bitcoin's consensus rules, not by a policy promise.
What happens to my Bitcoin if Firefish goes bankrupt?
You can reclaim it via the disaster-recovery transaction, which you pre-sign at origination and which unlocks one month after your loan's maturity date. This transaction requires no oracle signatures and lets you broadcast it independently if Firefish (or its oracles) becomes unresponsive. It is the structural backstop the protocol provides against platform failure.
Can Firefish rehypothecate my Bitcoin?
No. Because your Bitcoin is locked in a multisig output rather than held by Firefish as a custodian, it cannot be lent out, used as collateral for Firefish's own borrowing, or commingled with platform funds. This is the structural difference between Firefish and the custodial CeFi platforms that collapsed in 2022 (Celsius, BlockFi, Voyager, Genesis), all of which rehypothecated client collateral.
Does Firefish require KYC?
Yes. Firefish operates under the EU's MiCA regulation and is required to perform identity verification on borrowers and lenders. If you specifically need a no-KYC option, see our /best-no-kyc-crypto-loans/ comparison.
What is Firefish's maximum LTV?
The standard loan-to-value ratio is 50% — to borrow €10,000 you need around €20,000 of Bitcoin collateral. This is conservative compared to high-LTV CeFi competitors like Nexo (up to 80%) or YouHodler (up to 90%), but it gives a comfortable buffer against Bitcoin volatility and a top-up feature lets you add collateral if BTC price falls.
Is Firefish available in the US?
Yes. The United States is not on Firefish's published list of ineligible countries, and US residents can take out loans on the platform using the same 3-of-3 multisig escrow as everyone else. The practical limitation is that Firefish does not currently support a USD fiat rail — US borrowers receive their loan in USDC or USDT (stablecoins on Ethereum) rather than US dollars to a bank account. For most users this is a minor inconvenience rather than a hard blocker, since both stablecoins trade 1:1 with USD on every major exchange.
What currencies can I borrow from Firefish?
Firefish supports six payout currencies: EUR, CZK, CHF and PLN for borrowers based in its 34 fiat-supported countries (EEA + UK + Switzerland + Andorra + San Marino), plus USDC and USDT stablecoins on Ethereum for borrowers anywhere else, including the United States. Minimum loan size is around €800 equivalent.
What fees does Firefish charge?
Firefish charges a single platform fee on top of the interest rate: a 1.5% per-annum origination fee on the loan notional, deducted automatically from your Bitcoin collateral during the locking phase rather than billed monthly. There are no recurring account fees, no monthly maintenance fees, and no withdrawal fees beyond the standard Bitcoin network fees you pay for the escrow deposit and the closing transaction. Those Bitcoin network fees are unavoidable on-chain costs, not Firefish margin.
How long does it take to get a Firefish loan?
Instant Loans are pre-set rates and typically fund in around 2–3 days. Standard loans are market-matched (investors bid on your request), so funding time depends on demand and how aggressive your rate request is — but the average match-to-funding time the platform reports is roughly the same 2.5-day range.
How does Firefish compare to Ledn?
Both are reputable Bitcoin-only lenders, but the custody model is fundamentally different. Ledn uses third-party institutional custody (BitGo) with proof-of-reserves attestations and a fully-custodied loan model (no rehypothecation). Firefish uses a non-custodial 3-of-3 multisig on Bitcoin L1 where Firefish never holds the keys to your collateral. Ledn has a longer track record (since 2018) and supports direct USD payouts to US bank accounts. Firefish has a structurally stronger non-custodial guarantee, direct EUR / CZK / CHF / PLN bank rails in 34 European countries, USDC / USDT payouts for everyone else (including US residents), and a peer-to-peer marketplace pricing model. Choose Ledn if you specifically need a USD bank deposit or if you put more weight on track-record length and proof-of-reserves attestation. Choose Firefish if you want the strongest available "your keys, your coins" property even while borrowing.
Is Firefish regulated?
Yes. Firefish is registered under the EU's Markets in Crypto-Assets Regulation (MiCA) and listed in the ESMA Interim Register of Crypto-Asset Service Providers. This adds an EU regulatory layer on top of the protocol-level security guarantees.