Cowrie Research

bull-bitcoin

3 min read

Bull Bitcoin

  • Name: Bull Bitcoin
  • URL: https://www.bullbitcoin.com/
  • Category: bitcoin exchange / self-custody wallet-and-payments stack / non-custodial Lightning-and-Liquid infrastructure
  • Tags: bitcoin-ecosystem
  • Summary: Bull Bitcoin is a self-custody-first Bitcoin service stack: exchange, payouts, wallet software, and support wrapped around direct delivery into user-controlled wallets. Useful because the operator stack stays visible, not because it defines the broader merchant-payments field.
  • What it does:
    • Runs a non-custodial Bitcoin exchange and OTC desk where users buy Bitcoin from bank transfers and receive coins directly into their own wallet
    • Lets users sell Bitcoin for bank deposits, credit-card payments, bill payments, and related fiat payout flows, including Bylls-linked payment rails in Canada
    • Offers recurring-buy automation, Lightning and Liquid payout/receipt options, and LNURL-based Lightning withdrawal flows with fallback onchain delivery
    • Publishes BitcoinSupport.com guides and paid assistance aimed at helping users create wallets and learn self-custody before transacting
    • Develops the open-source BULL Wallet, a self-custodial Bitcoin-and-Liquid mobile wallet that supports Lightning via swaps, own-node connectivity, coin control, labels, watch-only imports, hardware-wallet companion flows, and reproducible builds
    • Optionally integrates the wallet with the Bull Bitcoin exchange so buys and sells can happen inside one app while payout addresses still remain self-custodial
  • Key claims:
    • The homepage says Bull Bitcoin is a “non-custodial Bitcoin exchange and OTC desk,” highlights instant withdrawal, Lightning support, and a mission centered on “sovereign individuals” rather than custodial convenience
    • The buy page says users fund an account, provide a Bitcoin, Lightning, or Liquid destination, and Bull Bitcoin creates a real Bitcoin transaction that is sent straight to the user’s wallet
    • The homepage says the company has been facilitating Bitcoin payments since 2013 and supports living off Bitcoin via bank-account payouts, credit-card payments, and bill-payment flows
    • The Lightning-scaling post says Bull Bitcoin open-sourced LNURL-Cypherapp and designed Lightning withdrawals with fallback addresses so the company does not accidentally become custodian if a withdrawal is not redeemed in time
    • The BULL wallet launch post says the wallet is fully open-source, BDK-based, Bitcoin-only, supports own-node connectivity, coin selection and labelling, Payjoin, watch-only imports, and automatic Lightning/Liquid routing via swaps
    • The same wallet post says BULL includes an autoswap feature that can automatically move Liquid balances above a threshold into an on-chain Bitcoin wallet, and positions the app as a hardware-wallet companion starting with Coldcard Q1 support
    • The GitHub README says the app can be built reproducibly from source, uses separate Secure Bitcoin and Instant Payments wallets derived from the same mnemonic, supports BIP-329 labels, watch-only PSBT flows, optional Bull Bitcoin exchange integration, and keeps private keys on-device
  • Whitepaper: No canonical standalone Bull Bitcoin or BULL Wallet whitepaper or litepaper surfaced in this pass. The clearest current sources of truth were the official site, product pages, blog posts, and the open-source wallet repository; see ../whitepapers/bull-bitcoin-primary-sources-2026-05-01.md.
  • Sources:

Internal linkages

Control surface

  • Practical authority sits in fiat-in and fiat-out handling, payout routing, recurring-buy automation, support-mediated user education, and the exchange hooks Bull Bitcoin adds around its wallet stack.

  • Read it as a self-custody service operator with wallet software attached, not as a merchant-stack anchor.

  • Last reviewed: 2026-06-03 UTC

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