Bitkey
2-of-3 multisig Bitcoin wallet from Block combining hardware, mobile app, and seedless recovery for approachable self-custody
Why We Recommend Bitkey
Bitkey is developed and operated by Block, Inc. (NYSE: SQ), a publicly traded financial technology company with a market cap in the tens of billions and regulatory compliance across multiple jurisdictions through its Square and Cash App products. This corporate backing means Bitkey benefits from institutional-grade security practices, ongoing development resources, and accountability to shareholders and regulators. The hardware and software are designed with transparency in mind, and Block has published details about the 2-of-3 multisig architecture where the company holds only one server key that cannot move funds without user participation.
The security model distributes trust across three keys: one on your phone, one on the hardware device, and one held by Block's servers. Any two keys are required to move funds, meaning Block alone cannot access your Bitcoin, while you retain ultimate control through your two keys. The hardware device stores its key offline with fingerprint authentication and NFC tap-to-sign, and the mobile key can be backed up to your cloud account. Privacy protections ensure Bitkey cannot see transaction details when you use your own keys, and the system is designed so that even if Block's servers went offline, users with both their phone and hardware device could still access funds.
Best For
Bitkey is ideal for Bitcoin holders who currently keep funds on exchanges like Coinbase, Cash App, or Robinhood and want to transition to self-custody without the anxiety of managing a 12 or 24-word seed phrase. If you have been putting off taking control of your own keys because traditional hardware wallets feel intimidating or unforgiving, Bitkey provides a middle path with structured recovery options. The tight integrations with popular exchanges make it easy to view prices across platforms, purchase Bitcoin, and transfer directly into your multisig wallet.
Families and individuals planning for inheritance will appreciate the built-in workflows that let you designate another Bitkey owner to inherit your funds. The recovery system handles common scenarios like losing your phone, hardware device, or both without requiring you to safeguard a paper backup. For everyday Bitcoin spending, you can set a mobile limit allowing small transactions with just your phone while larger amounts require tapping the hardware device.
More experienced Bitcoin users who already understand self-custody may find value in Bitkey as a secondary wallet or as a way to onboard family members. The collaborative security model offers protection against single points of failure while maintaining the user's ultimate control, making it suitable for long-term savings that you want protected by hardware-grade security with a safety net if something goes wrong.
Services & Features
- 2-of-3 multisig hardware wallet
- Mobile app for iOS and Android
- Seedless recovery system
- Inheritance designation workflows
- Configurable mobile spending limits
- Direct Cash App integration
- Direct Coinbase integration
- Direct Robinhood integration
- USB-C rechargeable hardware device
Considerations
Bitkey is Bitcoin-only and does not support other cryptocurrencies. The recovery and security model depends on Block's server key remaining available, which differs from fully independent hardware wallets. Requires a smartphone with iOS 15.2+ or Android 7.0+ and NFC capability.
