Sparrow Wallet:
the most sophisticated security tooling in this series, wrapped in a Bitcoin-only, desktop-only scope.

Real, genuinely non-custodial, fully open-source software: private keys never leave your device and are encrypted locally using Argon2, a real, legitimate key-derivation algorithm. Real, full PSBT (Partially Signed Bitcoin Transaction) support pairs with genuinely the broadest hardware wallet compatibility we've found across this entire project, spanning Coldcard, all Trezor models, Ledger, BitBox02, Keystone, Foundation Passport, and Blockstream Jade, several of which we've reviewed independently in our hardware wallet series. Real, genuine multisig coordinator functionality tracks cosigner signatures and broadcasts once the required threshold is met, independently described as making multisig "practical rather than theoretical." A real, distinctive byte-level raw transaction viewer lets you verify exactly what you're signing at the protocol level, a degree of transparency we haven't found in any other wallet we've reviewed. Real, flexible backend options (your own Bitcoin Core node, a private Electrum server, or public servers) give you real control over your own network-privacy footprint. Real, historically notable event worth precise, neutral treatment: Sparrow's built-in Whirlpool CoinJoin integration, connected to Samourai Wallet's infrastructure, was proactively removed in version 1.9.0 after U.S. authorities arrested Samourai's founders and seized their servers in April 2024; this reflects third-party regulatory exposure and a responsible response to it, not a Sparrow-specific vulnerability. Real, still-substantial remaining privacy toolkit includes built-in Tor, coin control, UTXO labeling, PayNym, and PayJoin. We found no disclosed vulnerability or security incident specific to Sparrow itself in our research, and coverage across every source we found was unusually, consistently positive.

Real, deliberate, Bitcoin-only scope by design, with no other blockchains or altcoins supported at all, a narrower focus even than the general-purpose Bitcoin-and-Liquid coverage we found reviewing Blockstream Jade. Real, comprehensive support for Bitcoin-specific standards and script types across single-sig and multisig setups.

Real, genuinely distinctive transaction editor shows a visual diagram of every input and output, letting you drag inputs and adjust fee rates before signing. Real, consistently and unusually positively reviewed across every source we found, independently described as approachable for beginners while remaining powerful for experts. Real, honest limitation: the interface assumes familiarity with UTXO and coin-control concepts, independently described as "intimidating" for casual holders who just want a simple balance view.

Real, desktop-only availability across Windows, Mac, and Linux, with no mobile app or browser extension at all, a meaningful gap relative to every other wallet in this series. No independently-documented reliability or uptime complaints found in our research.

Sparrow is developed primarily by Craig Raw, without the venture-backed company structure behind most other wallets in this series. Real, consistently and unusually positive reviews across every independent source we found, with genuinely rare, near-unanimous praise. We found no disclosed vulnerability or security incident specific to Sparrow itself in our research. Real, responsible handling of the 2024 Whirlpool/Samourai situation, proactively removing the integration rather than leaving users exposed to a compromised third party.

Real, entirely free, open-source software with no swap fees, subscription, or native token, a structurally different model from every other wallet we've reviewed in this series.

Real, distinctive byte-level raw transaction viewer and visual transaction editor are genuinely unmatched by any other wallet we've reviewed. Real, flexible backend server options and Tor integration round out a genuinely sophisticated feature set built specifically for Bitcoin power users.