Wallet of Satoshi

• Name: Wallet of Satoshi
• URL: https://www.walletofsatoshi.com/
• Category: hybrid custody-mode Lightning wallet / Spark-backed self-custody app / merchant receive surface
• Tags: bitcoin-ecosystem
• Summary: Wallet of Satoshi is no longer just the old custodial Lightning wallet note, but it is still not a Lightning control-plane anchor. The useful distinction is the split between its region-limited custodial mode, Spark-backed self-custody path, and small merchant receive surface.
• What it does:
  • Provides an iOS and Android Bitcoin wallet focused on fast Lightning payments with on-chain send and receive support
  • Issues Lightning Addresses and supports standard Lightning invoice payments
  • Operates two custody modes: self-custody globally and custodial wallets only in select regions
  • Uses Spark as the Layer 2 system behind the self-custody path
  • Lets users buy bitcoin in-app through financial partners in many countries
  • Ships a separate Wallet of Satoshi POS app for merchants, with LNURL and NFC Bolt Card support for receive-only checkout flows
• Key claims:
  • The homepage describes Wallet of Satoshi as “The World’s Simplest Bitcoin Lightning Wallet” and says it can pay Lightning invoices or send directly to an on-chain Bitcoin address
  • The homepage FAQ says custodial mode uses email sign-in for balance and history recovery, while self-custodial mode gives the user the keys and requires following in-app backup instructions
  • The disclosure document says Wallet of Satoshi now supports two custody models, with self-custody available globally and custodial service available only in select regions
  • The same disclosure says Spark is the third-party Layer 2 solution underpinning the self-custody functionality, which is a strong architectural signal that the self-custodial mode is not just a UI toggle on the legacy custodial product
  • The support post announcing “Wallet of Satoshi x Spark — Self-Custody, Simplified” says the self-custody Lightning wallet was built with Spark, started in private beta, and was partly motivated by a path to serve U.S. users again with a self-custodial experience
  • The Lightning-fees article says Wallet of Satoshi charges no fees for Lightning transactions beyond small routing fees paid to other nodes, reinforcing the payment-rail focus of the product
  • The POS page says the partner point-of-sale app is receive-only, LNURL-enabled, and supports NFC Bolt Cards, which broadens the project from wallet UX into merchant acceptance tooling
• Whitepaper: No canonical standalone Wallet of Satoshi whitepaper or litepaper surfaced in this pass. The clearest current sources of truth were the official homepage, disclosure document, support articles, and POS page; see ../whitepapers/wallet-of-satoshi-primary-sources-2026-05-01.md.
• Sources:
  • https://www.walletofsatoshi.com/
  • https://www.walletofsatoshi.com/disclosure
  • https://www.walletofsatoshi.com/pos
  • https://support.walletofsatoshi.com/
  • https://support.walletofsatoshi.com/support/discussions/topics/36000036486
  • https://support.walletofsatoshi.com/support/solutions/articles/36000483956-how-do-i-login-to-my-wallet-of-satoshi-app-for-the-first-time-
  • https://support.walletofsatoshi.com/support/solutions/articles/36000484020-how-do-i-recover-my-wallet-
  • https://support.walletofsatoshi.com/support/solutions/articles/36000484923-what-are-the-fees-for-lightning-transactions-
  • https://support.walletofsatoshi.com/support/solutions/articles/36000493699-which-countries-is-wallet-of-satoshi-available-in-

Internal linkages

• Strongest upward comparison points for the self-custodial path: phoenix-wallet and muun.
• Important architectural dependency in the current product: spark.

Control risk

• Practical leverage sits in which custody mode the product can legally expose by region, how much the self-custody path inherits from Spark, and the receive defaults inside the merchant POS shell.

• Last reviewed: 2026-06-05 UTC