Quais exchanges conseguem provar que realmente guardam o seu dinheiro?

Kraken holds a Wyoming SPDI charter, CFTC and SEC registrations and two EU MiCA authorisations, and has published Merkle-tree proof of reserves verified by Armanino LLP since February 2022; it discloses no insurance-fund figure.

• ✓Prova de reservas — Merkle-tree proof of reserves verified by third-party accountant Armanino LLP since February 2022, most recently finalised 30 June 2025 across BTC, ETH, SOL, USDC, USDT, XRP and ADA. (atende a este fator)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• ✓Regulação — Wyoming Special Purpose Depository Institution charter, CFTC DCM/DCO/FCM and SEC broker-dealer/RIA registrations, and two EU MiCA CASP authorisations; settled with the CFTC for $1.25m in September 2021 and with the SEC for $30m in February 2023 over its U.S. staking-as-a-service programme, relaunching on-chain U.S. staking in January 2025. (atende a este fator)
• !Seguro — No insurance-fund figure is publicly disclosed. Our research found no SAFU-equivalent named fund, which is a disclosure gap rather than confirmation that none exists. (parcial ou não verificado)
• ✓Histórico de incidentes — No confirmed major security incident found in our research; Kraken has operated since 2011 with no reported breach costing customers funds. (atende a este fator)

Binance publishes a self-attested proof-of-reserves page and a $1bn SAFU user-protection fund, which covered the May 2019 hot-wallet theft of about 7,000 BTC in full; it settled U.S. Bank Secrecy Act and sanctions charges for $4.3bn in November 2023 and remains under a five-year DOJ compliance monitorship.

• !Prova de reservas — Publishes Merkle-tree proof of reserves covering 30-plus assets, most recently a 1 January 2026 snapshot of 636,535 BTC, but the reports are self-published rather than independently audited. (parcial ou não verificado)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Holds an ADGM (UAE) authorisation and, via Binance.US, money-transmitter licences in 30 states (NMLS ID 1906829); pleaded guilty to U.S. Bank Secrecy Act and sanctions violations in November 2023, paying $4.3bn and accepting a five-year DOJ compliance monitorship running to 2028. (parcial ou não verificado)
• ✓Seguro — SAFU user-protection fund, established in 2018 and topped up to $1bn in November 2022; it covered the May 2019 hack in full. (atende a este fator)
• !Histórico de incidentes — About 7,000 BTC (roughly $40m at the time) drained from hot wallets on 7 May 2019; the SAFU fund covered the loss in full and no user lost funds. No platform breach of comparable scale has been reported since. (parcial ou não verificado)

Bitget publishes a monthly open-source Merkle-tree proof of reserves showing BTC at 138% and ETH at 181%, and cites a protection fund its own sources size differently; ASIC issued an investor alert in July 2025 over unlicensed high-leverage derivatives.

• ✓Prova de reservas — Monthly open-source Merkle-tree proof of reserves published on GitHub, showing BTC reserves at 138%, ETH at 181%, USDC at 107% and USDT at 101%. (atende a este fator)
• !Custódia — Uses multi-signature cold storage, but the cold/hot storage split is not disclosed and we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Lists an AUSTRAC registration, El Salvador CNAD/BSP licences, Argentine CNV and Mexican SAT registrations, a UK FCA Section 21 approver partnership and a Swiss FINMA SRO membership, without registration numbers we could check against public registers. ASIC issued a public investor alert on 28 July 2025 over unlicensed crypto derivatives sold to Australian retail clients at up to 125x leverage, noting Bitget holds no Australian Financial Services licence; its own corporate registration is cited variously as Seychelles, Lithuania or New Zealand. (parcial ou não verificado)
• !Seguro — A protection fund is disclosed but sized inconsistently across sources — $630m in one, 6,500 BTC (implemented December 2022) in another — so no single figure is confirmed. (parcial ou não verificado)
• ✓Histórico de incidentes — No confirmed major security incident found in our research. (atende a este fator)

Bybit publishes monthly Merkle-tree proof of reserves audited by Hacken OU and holds a partial EU MiCA licence in Austria; it stayed solvent after the February 2025 theft of roughly $1.46–1.5bn — the largest exchange hack on record — replenishing reserves in full within 72 hours.

• ✓Prova de reservas — Merkle-tree and proof-of-liabilities audits by Hacken OU, monthly since June 2024 and published as signed reports; Hacken is a crypto-security specialist rather than a Big Four financial auditor. (atende a este fator)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — EU MiCA licence via Bybit EU GmbH (Austrian FMA, May 2025) covering 5 of the 10 MiCA service categories, plus provisional, non-operational VARA approval in Dubai; the UK FCA issued a public warning in February 2025 and Bybit re-entered the UK in December 2025 through FCA-regulated Archax. (parcial ou não verificado)
• !Seguro — Maintains a dedicated insurance fund backstopping derivatives liquidations, which was drawn on in the post-hack solvency response, but its standing balance is not disclosed. (parcial ou não verificado)
• ✕Histórico de incidentes — About $1.46–1.5bn stolen in February 2025 through a Safe multisig interface phishing attack attributed to North Korea's Lazarus Group — the largest crypto exchange hack on record. Bybit remained solvent and fully replenished reserves within 72 hours, but only 3.54% of the stolen funds were ever frozen. (não atende a este fator)

Coinbase is a publicly traded, SEC-reporting U.S. company licensed in 45 states and holding a New York BitLicense, and the SEC's 2023 case against it was dismissed with prejudice in February 2025; it runs no crypto-specific proof-of-reserves programme and its last disclosed crime-insurance figure dates from 2019.

• !Prova de reservas — Runs no exchange-wide proof-of-reserves programme; reserve assurance rests on its Deloitte-audited filings as an SEC-reporting public company, plus per-asset attestations for wrapped tokens such as cbBTC. (parcial ou não verificado)
• !Custódia — Coinbase Custody is an NYDFS-regulated qualified custodian, but the cold/hot storage split is not disclosed and we could not confirm it from a primary source. (parcial ou não verificado)
• ✓Regulação — New York BitLicense, FinCEN MSB registration, UK FCA registration FRN 900635 and licences in 45 U.S. states; paid a $100m NYDFS consent order in January 2023, and the SEC's 2023 unregistered-exchange suit was dismissed with prejudice on 27 February 2025. (atende a este fator)
• !Seguro — A $255m crime policy covering hot-wallet assets was disclosed in 2019; Coinbase still advertises commercial crime cover for custodied assets but has not confirmed a current figure. (parcial ou não verificado)
• ✓Histórico de incidentes — No confirmed platform-level breach of customer funds found in our research. (atende a este fator)

Crypto.com discloses more than $870m of insurance cover, had its SEC investigation closed with no action in March 2025 and holds a Malta MiCA authorisation; its proof-of-reserves position is contested between our sources, and it reimbursed all users after a January 2022 incident that drained about $34–35m from 483 accounts.

• !Prova de reservas — Our two sources conflict: one records a published proof-of-reserves portal, the other found no exchange-wide programme. No methodology, auditor or reserve figure was confirmed either way. (parcial ou não verificado)
• !Custódia — Cold-storage assets sit with custodial partner Ledger Vault, but the cold/hot storage split is not disclosed and we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Malta MFSA MiCA CASP authorisation granted 27 January 2025 covering 6 of the 10 service categories, plus an EU Limited Financial Institution licence from 27 February 2026 for stablecoin services, and licences listed across Singapore, Canada, the UK, Australia, Hong Kong, Brazil and the U.S. without registration numbers we could check against public registers. The SEC closed its investigation with no enforcement action on 27 March 2025. (parcial ou não verificado)
• ✓Seguro — More than $870m of disclosed cover: $750m on cold-storage assets through custodial partner Ledger Vault, expanded September 2021, plus $120m of institutional custody insurance arranged through Aon and announced 25 June 2025. U.S. fiat balances are held at FDIC-insured Community Federal Savings Bank. (atende a este fator)
• !Histórico de incidentes — About $34–35m taken from 483 accounts in January 2022 through a 2FA compromise; Crypto.com disclosed the breach publicly and fully reimbursed all affected users. (parcial ou não verificado)

HTX publishes monthly Merkle-tree proof of reserves that excludes corporate holdings, discloses only a Pakistani no-objection certificate among its authorisations, blocked the entire EU rather than seek MiCA licensing, and faces UK FCA High Court proceedings.

• ✓Prova de reservas — Monthly Merkle-tree proof of reserves, a run of 36 consecutive months as of October 2025 and most recently published July 2026; corporate holdings are excluded from the proof. (atende a este fator)
• !Custódia — Cold storage is described by third-party reviewers as air-gapped with hardware security modules and multi-signature controls, but no cold/hot split is disclosed and we could not confirm one from a primary source. (parcial ou não verificado)
• !Regulação — Only a Pakistan PVARA no-objection certificate was confirmed among its listed authorisations; it holds no MiCA or UK authorisation and blocked the entire European Union from 1 July 2026 rather than seek one. The UK FCA began High Court proceedings against Huobi Global S.A. on 21 October 2025 over illegal financial promotions. (parcial ou não verificado)
• !Seguro — No insurance or safety-fund figure is publicly confirmed. That is a disclosure gap rather than confirmation that none exists. (parcial ou não verificado)
• !Histórico de incidentes — About $7.9–8m (5,000 ETH) stolen in September 2023; roughly 95% was recovered by negotiation with the attacker, with a 5% white-hat bounty paid and no user losses reported. (parcial ou não verificado)

MEXC publishes a proof-of-reserves page stating a reserve-rate methodology and cites a $100m Guardian Fund through a single source; Estonia's financial intelligence unit revoked its VASP licence in November 2023.

• !Prova de reservas — The proof-of-reserves page states a reserve-rate methodology but publishes no figures we could extract; a June 2026 Hacken-audited snapshot at 114–269% coverage is reported by third parties and could not be confirmed against the primary page. (parcial ou não verificado)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Holds FinCEN MSB, AUSTRAC, Canadian MSB and Swiss VQF registrations — AML monitoring obligations rather than exchange licences. Estonia's Financial Intelligence Unit revoked MEXC Estonia OÜ's licence in November 2023, and a June 2024 blacklist entry surfaced in our research without a clear issuing body or stated consequence. (parcial ou não verificado)
• !Seguro — A $100m 'Guardian Fund' is cited by a single third-party source and is not confirmed by any primary MEXC disclosure. (parcial ou não verificado)
• ✓Histórico de incidentes — No confirmed major security incident found in our research. (atende a este fator)

OKX publishes monthly zk-STARK proof of reserves with an open-source verification tool and holds Dubai VARA and Malta MiCA authorisations, but its Seychelles operating entity pleaded guilty in the U.S. in February 2025 and paid over $504m.

• ✓Prova de reservas — Monthly zk-STARK v2 proof of reserves — the 44th report covered $22.65bn in primary reserve assets — with an open-source verification tool on GitHub so users can check their own balances against the published Merkle root. (atende a este fator)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Dubai VARA VASP licence VL/23/12/003 and an EU MiCA CASP authorisation via OKX Europe Limited (Malta MFSA, 27 January 2025); operating entity Aux Cayes FinTech Co. Ltd. pleaded guilty in U.S. federal court on 24 February 2025 to running an unlicensed money-transmitting business and paid over $504m. (parcial ou não verificado)
• ✕Seguro — No insurance or safety fund is publicly disclosed beyond the proof-of-reserves programme. That is a statement about what OKX discloses, not a finding that it is uninsured — but an undisclosed fund is one a user cannot rely on. (não atende a este fator)
• ✓Histórico de incidentes — No confirmed major security incident found in our research. (atende a este fator)

Bitstamp was the first crypto-asset service provider licensed under MiCA in Luxembourg and has been owned by Robinhood since June 2025; it custodies with BitGo but publishes neither proof of reserves nor an insurance figure, and lost about 19,000 BTC in a 2015 hot-wallet hack.

• ✕Prova de reservas — No proof-of-reserves programme was found. Bitstamp reports SOC 2 compliance and annual Big Four accounting audits, but those are not published reserve attestations a user can check. (não atende a este fator)
• !Custódia — Custodies with BitGo since 10 October 2019 and roughly 95% cold storage is reported by third-party reviewers, but Bitstamp publishes no cold/hot split we could confirm from a primary source. (parcial ou não verificado)
• ✓Regulação — Bitstamp Europe S.A. was the first crypto-asset service provider granted a full MiCA licence in Luxembourg, by the CSSF on 16 May 2025 and passported across the EU/EEA, alongside a reported New York BitLicense; since 2 June 2025 it has been owned by Robinhood, an SEC-reporting public company. (atende a este fator)
• ✕Seguro — No insurance or safety fund is publicly disclosed. Custody sits with BitGo, whose own policy was not shown to extend to Bitstamp balances. That is a statement about what Bitstamp discloses, not a finding that it is uninsured — but an undisclosed fund is one a user cannot rely on. (não atende a este fator)
• !Histórico de incidentes — About 19,000 BTC stolen from hot wallets in January 2015; Bitstamp recovered and kept operating, and its current BitGo custody architecture postdates the hack by several years. One of our two sources could not re-verify the incident against a primary record. (parcial ou não verificado)

dYdX is a non-custodial perpetuals protocol where balances stay in user-controlled wallets and an on-chain insurance fund is financed by a 1% liquidation fee; it holds no exchange licence in any jurisdiction, and a March 2024 attack cost roughly $9m, about 40% of the v3 insurance fund at the time.

• ✓Prova de reservas — Non-custodial: balances stay in user-controlled wallets and are verifiable directly on-chain, so no reserve attestation is needed. (atende a este fator)
• ✓Custódia — Non-custodial protocol — it never takes custody of user funds, so there is no hot/cold split to disclose. (atende a este fator)
• ✕Regulação — Holds no exchange licence in any jurisdiction; the v4 protocol runs on its own Cosmos SDK chain under community governance, supported by dYdX Trading Inc. in San Francisco and the dYdX Foundation in Zug. U.S. and Canadian users are blocked at the interface layer rather than by any licensed entity. (não atende a este fator)
• !Seguro — An on-chain insurance fund financed by a 1% fee on liquidations, verifiable on-chain but with no disclosed balance; a March 2024 attack consumed roughly 40% of the v3 fund, and a March 2025 DAO vote moved $10m USDC out of it to cover operating expenses. (parcial ou não verificado)
• !Histórico de incidentes — Roughly $9m lost in a targeted attack on 5 March 2024, about 40% of the v3 insurance fund at the time; separately, a deposit-proxy vulnerability was exploited by a white hat to rescue about $2m before attackers reached it. One of our two sources recorded no confirmed incident. (parcial ou não verificado)

Gate.io holds a Malta MiCA authorisation and an EU payment-services licence, and has published Merkle-tree plus zk-SNARK proof of reserves with Armanino LLP involved since October 2022, though only its U.S. entity's figures come from a primary source.

• !Prova de reservas — Has published proof of reserves since around May 2020 using a combined Merkle-tree and zk-SNARK method, with third-party involvement from Armanino LLP since 19 October 2022; only the U.S. entity's 100% ratio is primary-sourced, and the global platform's reported 124% ratio comes from third parties. (parcial ou não verificado)
• !Custódia — Roughly 95% of assets in cold storage is reported by third parties, but Gate publishes no cold/hot split we could confirm from a primary source. (parcial ou não verificado)
• !Regulação — Malta MFSA MiCA CASP authorisation granted 29 September 2025 covering 6 of the 10 service categories, and a PSD2 payment-services licence from 26 February 2026, alongside a Gibraltar GFSC DLT licence and a TCSP registration listed on its own licences page without registration numbers we could check; access is restricted from roughly 30–34 countries including the U.S., UK, Canada and most of Western Europe. (parcial ou não verificado)
• ✕Seguro — No insurance or safety fund is publicly disclosed. That is a statement about what Gate discloses, not a finding that it is uninsured — but an undisclosed fund is one a user cannot rely on. (não atende a este fator)
• ✓Histórico de incidentes — No confirmed major security incident found in our research; Gate claims a 13-year record with no platform-level breach, and holds ISO 27001 certification alongside a CER.live AA rating of 88/100. (atende a este fator)

Gemini is a New York-chartered trust company available in all 50 states with $100m of disclosed custody insurance, but publishes no exchange-wide proof of reserves and paid a $37m NYDFS penalty in 2024 over its collapsed Earn programme.

• ✕Prova de reservas — No exchange-wide proof-of-reserves programme was found. Gemini holds SOC 1 Type 2 and SOC 2 Type 2 reports, with Deloitte & Touche involved, but those are controls audits rather than reserve attestations. (não atende a este fator)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• ✓Regulação — New York limited-purpose trust company charter granted in September 2015, operating in all 50 states; the February 2024 NYDFS consent order over the Gemini Earn programme carried a $37m penalty and more than $1.1bn committed back to users, alongside a $50m New York Attorney General recovery. (atende a este fator)
• !Seguro — Gemini Custody discloses $100m of insurance cover and Gemini operates an in-house Bermuda captive insurer; the cover is scoped to the custody product and we could not confirm it extends to retail exchange balances. (parcial ou não verificado)
• ✓Histórico de incidentes — No confirmed breach of Gemini's own systems found in our research; the Earn programme's collapse was a lending-counterparty failure at Genesis, not an attack on the exchange. (atende a este fator)

KuCoin holds an Austrian FMA MiCAR licence passportable across 29 EEA countries but pleaded guilty in the U.S. in March 2024, paying $297m and accepting a ban since made permanent; its proof-of-reserves position is contested between our sources, and it lost roughly $280m in its September 2020 hack, with users made whole.

• !Prova de reservas — Our two sources conflict: one records Hacken-audited proof of reserves running 32 consecutive months to October 2025 with coverage above 100%, the other found no proof-of-reserves programme at all. Neither could be confirmed against a primary KuCoin disclosure. (parcial ou não verificado)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• !Regulação — Austrian FMA MiCAR CASP licence passportable across 29 EEA countries; operating entity Peken Global Ltd. pleaded guilty in March 2024 to unlicensed money transmission, paying $297m and accepting a two-year U.S. ban since made permanent by a March 2026 CFTC consent order. Related entities settled with the New York Attorney General for $22m in December 2023 and were permanently banned by the Ontario Securities Commission in June 2022. (parcial ou não verificado)
• !Seguro — An insurance fund covered the 16% of 2020 hack losses that was not recovered, but its standing balance is not disclosed. (parcial ou não verificado)
• !Histórico de incidentes — About $280–281m stolen in September 2020; 84% was recovered through on-chain tracing, token reissuance and exchange cooperation, and the remainder covered by the insurance fund, leaving users whole. (parcial ou não verificado)

Bitfinex is BVI-registered with no public licence register found and publishes no proof of reserves; it lost about 119,756 BTC in the August 2016 hack, and roughly $850m in commingled customer and corporate funds was seized or lost at its payment processor in 2018–19.

• ✕Prova de reservas — No proof-of-reserves programme was found; both of our sources record none, and neither identified an independent reserve attestation of any kind. (não atende a este fator)
• !Custódia — Cold/hot storage split is not disclosed; we could not confirm it from a primary source. (parcial ou não verificado)
• ✕Regulação — No public licence register was found beyond its British Virgin Islands incorporation, and it blocks U.S. and California residents outright. Settled with the CFTC for $75,000 in 2016 and $1.5m in October 2021, and with the New York Attorney General for $18.5m in February 2021 alongside affiliate Tether. (não atende a este fator)
• !Seguro — No named insurance fund was identified in our research. That is a disclosure gap rather than confirmation the cover is zero. (parcial ou não verificado)
• ✕Histórico de incidentes — About 119,756 BTC (roughly $72m at the time) stolen in August 2016, with U.S. authorities recovering $3.6bn from the perpetrators in 2022; separately, roughly $850m in commingled customer and corporate funds was seized or lost at payment processor Crypto Capital in 2018–19 and made good from affiliate Tether's balance sheet. (não atende a este fator)