Bitkey (Block)

Bitkey (Block) is a hardware wallet. Made by Block (Jack Dorsey's company). A 2-of-3 multisig with no seed phrase: one key on the hexagonal device (unlocked by fingerprint), one in the phone app, and one on Block's server for recovery. Any two keys sign, so Block alone cannot move your coins, and losing the phone or the device can be recovered. There is also built-in inheritance and an Emergency Exit Kit for leaving without Block's server. The 2026 model adds an OLED touchscreen. The code is published on GitHub under MIT, but the firmware can't be built from it because the fingerprint library is proprietary. Ships to many countries; check availability at checkout. Trade-off: it depends on Block's app and server for everyday convenience.