Bitkey Bitkey
A plan byBitkey
Bitkey, made by Block Inc. (Jack Dorsey's company behind Cash App and Square), is a Bitcoin-only hardware wallet built for simplicity. It drops the classic single-key model: it uses a 2-of-3 multisig in which the user holds two keys (one on the fingerprint-enabled hardware device, one in the mobile app) and Block keeps the third, used only for recovery. No single key, including Block's, can authorize a transaction alone: funds stay self-custodial, but the recovery key held by the company is a trade-off to weigh. The device talks to the app over NFC (tapping the card to the phone) and is not air-gapped. Firmware and apps are open-source. Price around €196 (from €230).
Bitkey
- Price
- €196
What's included
- Hardware device with fingerprint sensor
- Free mobile app
- 2-of-3 multisig (2 user keys + 1 Block recovery)
- Bitcoin-only
Data & conditions
| Fund custody | Self-custody (funds in your control) |
|---|---|
| Type | Hardware (cold storage) |
| Source code | Open-source |
| Recovery | Multisig 2-di-3: due chiavi in mano all'utente (hardware + app), terza chiave di recovery conservata da Block |
| Bitcoin-only | Yes |
| Supported chains | Bitcoin |
| Price | €196 |
| Secure element | Yes |
| Air-gapped | No |
| Connectivity | NFC |
| Built-in swap | No |
| Built-in staking | No |
| Segment | B2C |
| MiCA / License status | Nessuna (hardware wallet self-custody) |
Strengths
- Bitcoin-only with a simple setup; 2-of-3 multisig with two user-held keys (hardware + app) and assisted recovery; fingerprint sensor on the device; open-source firmware and apps; solid company (Block Inc.).
- Self-custody: funds stay in your wallet — the platform cannot touch them.
- No KYC: usable without identity verification.
- Open-source, verifiable code.
Weaknesses
- The multisig's third key is held by Block: while it cannot move funds on its own, it brings a corporate party into the recovery model, less pure than a fully self-contained wallet; NFC communication, not air-gapped; Bitcoin-only (no multi-asset); reliance on the mobile app.
- No notable sovereignty drawback documented.
Verdict
Score 4.3/5, very strong profile. In its favour: bitcoin-only with a simple setup; 2-of-3 multisig with two user-held keys (hardware + app) and assisted recovery; fingerprint sensor on the device; open-source firmware and apps; solid company (Block Inc.). The trade-off to weigh: the multisig's third key is held by Block: while it cannot move funds on its own, it brings a corporate party into the recovery model, less pure than a fully self-contained wallet; NFC communication, not air-gapped; Bitcoin-only (no multi-asset); reliance on the mobile app.
On the Sovereignty lens the score is 4.6/5 (outstanding): the strength is fund control (5.0/5), while censorship resistance (4.0/5) is the weak link.
Promp's editorial rating based on real fees and net annual cost. Promp reviews third-party products independently.
"Sovereignty" rating: score computed on privacy/anonymity (30%), fund control (20%), censorship resistance (20%), trustless/auditability (20%) and costs (10%). Same data, different weights.
FAQ
How much does Bitkey cost?
Bitkey costs about €196 (discounted from €230 on the official store). The price covers the hardware device; the mobile app is free. Data from the Bitkey store, August 2026.
Can Block move my funds with its key?
No: Bitkey uses a 2-of-3 multisig and two keys are needed to sign. You hold two (hardware device and app); Block keeps only one, used for recovery. A single key, including Block's, is not enough to authorize a transaction. It is still a model trade-off: a third party is involved in recovery.
Does Bitkey support coins other than Bitcoin?
No: Bitkey is Bitcoin-only by design, to keep the product simple and the attack surface small. It does not handle Ethereum, tokens or other chains.
Sources
- Official service page Prezzo eur · Bitcoin only · Multisig 2di3 · Azienda Data verified on Aug 3, 2026