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Infrastructure providers, financial services, and Bitcoin-native businesses building the future.
25 listings, grouped Bitcoin first by label. Inside each group: open source first, then the rest, then listings marked Not recommended, each A to Z here (the interactive directory rotates them weekly). Nothing is hidden. This version needs no JavaScript.
Bitcoin used directly as money, or tools for running, securing and building on it.
Blockstream ₿ TOOL
Bitcoin and digital asset infrastructure.
Group-held. Blockstream says Liquid is operated by 15 geographically distributed functionary nodes, with 11 of 15 signatures needed per block; its App and Jade wallets are listed separately. Blockstream: Liquid security incident assessment
Advisory · LIQUID PEG-OUTS PAUSED since 6 September 2026 — the reserve is still being restored (2026-10-03)
Blockstream develops the Liquid sidechain and published the incident report. On 6 September 2026 an attacker used a bug in Elements, the software Liquid runs on, to create about 4,000 L-BTC with no bitcoin behind it, then withdrew about 4,000 BTC from the Liquid reserve through SideSwap, a federation member that can authorise peg-outs. Blockstream says the reserve fell from about 4,205 BTC to 197 BTC, that 3,400 BTC were returned on 7 September, and that about 602 BTC are still the subject of recovery efforts. The bug was patched within hours, Liquid transactions resumed on 10 September, and Blockstream says other Liquid-issued assets were not affected. Peg-outs (the way to turn L-BTC back into bitcoin through the federation) remain paused while the reserve is restored; liquid.net still said so on 3 October 2026. Blockstream’s report gives no date for reopening and says no recovery stage proceeds until it is independently judged safe.
Our position: listed, with this notice, because Liquid still runs and Blockstream has published what happened. Until peg-outs reopen, L-BTC cannot be turned back into bitcoin through the federation; bitcoin held on-chain is separate and not affected. The facts above come from Blockstream’s incident report, its status page and liquid.net — check them yourself.
Sources: Blockstream: “Liquid Network Security Incident Assessment” (23 September 2026) · Blockstream status page: Liquid Security Incident (latest update 10 September 2026) · liquid.net (peg-out status, checked 3 October 2026) · The Block: Liquid Network pauses after a withdrawal of about 4,000 BTC (6 September 2026)
Coinkite ₿ USE
Makers of Coldcard, Opendime, and Bitcoin hardware.
Non-Custodial. Only you hold the keys to your bitcoin. Coinkite: Home
Advisory · Security advisory — Coldcard seed-generation incident (2026-07-30)
Coinkite's Coldcard line is subject to an active security incident: a firmware flaw introduced in 2021 weakened seed generation on affected devices, and independent trackers verify 1,367+ BTC drained from affected wallets since July 30, 2026. Fixed firmware shipped July 31, 2026 — but updating does not repair an existing seed. See the Coldcard listing in Wallets & Storage for the full notice.
Sources: Coinkite security advisory
Fedi ₿ USE
Federated Bitcoin custody for communities.
Group-held. Fedi says a federation of Guardians holds the shared wallet, and that moving money requires more than two-thirds of the Guardians agreeing. Fedi: Community custody
Lightning Labs ₿ TOOL
Lightning Network infrastructure.
Spiral ₿ TOOL
Lightning Development Kit and Bitcoin research.
Start9 ₿ TOOL
Personal sovereign server for freedom tech.
Anchorage Digital ₿ USE
First federally chartered crypto bank.
Custodial. Anchorage describes itself as a federally chartered, SEC-qualified custodian; its Porto self-custody wallet products come from Anchorage Innovations, which says it is not a custodian. Anchorage: Custody
AnchorWatch ₿ USE
Bitcoin custody with Lloyd's of London insurance.
Custody. AnchorWatch says clients choose between Flagship Custody, where you hold your own private keys alongside AnchorWatch, and Multi-Institution Custody, with keys distributed across three institutions. AnchorWatch: Home
BitGo ₿ USE
Institutional Bitcoin custody and financial services.
Custodial. BitGo says its main product is qualified custody with segregated client assets; its optional self-custody hot wallets give you the Client Key and Backup Key while BitGo keeps the Platform Key. BitGo: Qualified custody
Casa ₿ USE
Collaborative multisig Bitcoin custody for individuals.
Shared keys. Casa says it holds a backup key in each vault (2-of-3, 3-of-5 or 3-of-6) and can never move funds alone; your own keys meet the threshold. Casa: Vault
CoinRabbit ₿ USE
Custodial stablecoin loans with bitcoin as collateral.
Custodial. CoinRabbit’s terms say it acquires ownership of the digital assets posted as collateral and, once the loan is repaid, returns the equivalent amount to your address. CoinRabbit: Terms of use
Fold ₿ USE
Earn Bitcoin on every purchase.
Custodial. Fold’s fine print says bitcoin custody and exchange services are provided by BitGo and are subject to BitGo’s Terms of Use. Fold: Home
Lava ₿ USE
Custodial Bitcoin-backed loans.
Custodial. Lava’s FAQ says keys are held across multiple distributed entities using a distributed key protocol with institutional custodians, and funds are never lent out, traded or rehypothecated. Lava: How are my funds secured?
Ledn ₿ USE
Bitcoin-backed loans and savings accounts.
Custodial. Ledn says loan collateral is held with a qualified independent custodian and may be re-posted only to an institutional USD funding partner, and that neither may lend it out. Ledn: Home
NYDIG ₿ USE
Power, bitcoin mining and data-centre developer.
Strike ₿ USE
Instant Bitcoin and Lightning payments for everyone.
Custodial. The company holds the keys to your bitcoin. Strike: US individual terms (Bitcoin Custody)
Unchained ₿ USE
Bitcoin financial services and multisig custody.
Shared keys. Unchained says it holds one key of three in a vault, so you hold two; in a loan, your company, Unchained and Fortis Bank each hold one key and none can move the collateral alone. Unchained: Vaults
Voltage ₿ USE
Lightning payments infrastructure for businesses.
Xapo Bank ₿ USE
Gibraltar-regulated bank with USD accounts and Bitcoin services.
Custodial. Xapo says it manages the private keys on your behalf, split by multi-party computation so no single entity at Xapo has the full key; its optional BTC Vault adds a 48-hour withdrawal delay. Xapo Bank: Custody
About bitcoin: learn, track or get professional help. No bitcoin moves through them.
JAN3 SERVICE
Accelerating Bitcoin adoption worldwide.
Advisory · LIQUID PEG-OUTS PAUSED since 6 September 2026 — the reserve is still being restored (2026-10-03)
JAN3 makes the Aqua wallet, which holds L-BTC (bitcoin on the Liquid sidechain) next to on-chain bitcoin. On 6 September 2026 an attacker used a bug in Elements, the software Liquid runs on, to create about 4,000 L-BTC with no bitcoin behind it, then withdrew about 4,000 BTC from the Liquid reserve through SideSwap, a federation member that can authorise peg-outs. Blockstream says the reserve fell from about 4,205 BTC to 197 BTC, that 3,400 BTC were returned on 7 September, and that about 602 BTC are still the subject of recovery efforts. The bug was patched within hours, Liquid transactions resumed on 10 September, and Blockstream says other Liquid-issued assets were not affected. Peg-outs (the way to turn L-BTC back into bitcoin through the federation) remain paused while the reserve is restored; liquid.net still said so on 3 October 2026. Blockstream’s report gives no date for reopening and says no recovery stage proceeds until it is independently judged safe.
Our position: listed, with this notice, because Liquid still runs and Blockstream has published what happened. Until peg-outs reopen, L-BTC cannot be turned back into bitcoin through the federation; bitcoin held on-chain is separate and not affected. The facts above come from Blockstream’s incident report, its status page and liquid.net — check them yourself.
Sources: Blockstream: “Liquid Network Security Incident Assessment” (23 September 2026) · Blockstream status page: Liquid Security Incident (latest update 10 September 2026) · liquid.net (peg-out status, checked 3 October 2026) · The Block: Liquid Network pauses after a withdrawal of about 4,000 BTC (6 September 2026)
Ten31 SERVICE
Venture firm investing in bitcoin, energy and AI.
Separate networks or token systems built around bitcoin.
Babylon Protocol PROTOCOL
Bitcoin staking and Bitcoin-collateral infrastructure.
Custody. Babylon’s docs list self-custody as a requirement of its staking design, where stakers “maintain direct control of their Bitcoin”; a covenant committee can execute slashing by majority consensus. Babylon docs: Bitcoin Staking
Lombard Finance PROTOCOL
Yield-bearing Bitcoin (LBTC) and Bitcoin DeFi infrastructure.
Custodial. Lombard’s LBTC terms say deposited BTC becomes the Issuer’s property; its docs say the backing sits with a 14-member consortium and with custodians Anchorage Digital Bank and Kraken Institutional. Lombard: LBTC Product Terms (12 Aug 2026)
Companies that hold bitcoin on their balance sheet. Their shares are not bitcoin: not your keys, not your bitcoin.
Metaplanet TREASURY
Tokyo-listed Bitcoin treasury company.
Not your keys, not your bitcoin. Owning the company’s shares does not give you bitcoin.
Strategy TREASURY
Nasdaq-listed Bitcoin treasury company (MSTR).
Not your keys, not your bitcoin. Owning the company’s shares does not give you bitcoin.