ColdCard
ColdCard is a hardware wallet for advanced users prioritizing security verification, air-gapped signing, and open-source principles. Manufactured by Coinkite, widely used in multisig setups.
ColdCard is a hardware wallet for advanced users prioritizing security verification, air-gapped signing, and open-source principles. Manufactured by Coinkite, widely used in multisig setups.
The spectrum of bitcoin custody ranges from full self-custody to fully custodial exchange wallets. The right model depends on technical ability, threat model, and need for inheritance or recovery.
Command-line tool and Python library for connecting hardware wallets to Bitcoin Core. Enables direct signing with devices like Trezor, Ledger, and Coldcard without trusting intermediary software.
Jade DIY is Blockstream's open-source firmware for the Blockstream Jade hardware wallet, made available for installation on compatible off-the-shelf hardware. The project lets users build and verify their own Jade-compatible signing device from generic components.
Krux is open-source firmware that enables anyone to build a Bitcoin signing device from off-the-shelf parts. It runs on cheap, general-purpose microcontrollers (e.g. M5StickV, Maix Amigo, Maix Dock) and turns them into air-gapped signing devices.
Ledger is a hardware wallet manufacturer using secure element (SE) chips to protect private keys. One of the most widely sold hardware wallets globally.
Deep dive into n-of-m multisignature schemes, hardware wallet coordination, deterministic wallets (BIP-85), and popular multisig coordinators (Sparrow, Nunchuk, CARAVAN).
Open-source, DIY Bitcoin signing device built from commodity hardware. Designed for air-gapped seed generation, transaction signing, and multisig coordination without trusting proprietary hardware.
Specter DIY is an open-source, do-it-yourself hardware wallet project from the Specter suite. It turns commodity hardware into an air-gapped signing device that pairs with Specter Desktop for multisig and single-sig custody.
Trezor is a hardware wallet developed by SatoshiLabs. The first commercial hardware wallet (2014), known for fully open-source firmware.
Decision framework for choosing between single-sig, multisig, collaborative custody, and custodial solutions mapped to specific threat models and capability levels.