Keystone hardware wallet
Air-gapped open-source hardware wallet that signs over QR codes and works with MetaMask and other wallets.
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Keystone key facts
| Category | Hardware wallet |
|---|---|
| Chains | Bitcoin, Ethereum and 5,500+ assets |
| Platforms | Hardware |
| Custody | Self-custody |
| Pricing | Keystone 3 Pro: $149 |
| Chains | 5,500+ assets; 45+ software wallets |
| Open source | Yes, firmware on GitHub |
| US availability | Available: terms restrict only sanctioned jurisdictions |
What is Keystone?
Keystone is an air-gapped hardware wallet with no USB data, Bluetooth, Wi-Fi or NFC; it signs through QR codes. The Keystone 3 Pro lists at $149, has a 4-inch touchscreen and three secure element chips, and its firmware is public on GitHub. It connects to 45+ software wallets such as MetaMask.
How Keystone works
The Keystone 3 Pro keeps its keys offline and talks to your phone or computer through QR codes.
A companion wallet such as MetaMask, Rabby, BlueWallet, Keplr or Solflare builds an unsigned transaction and shows it as a QR code. The device camera scans it, you check the details on the 4-inch touchscreen, approve with a fingerprint or password, and the device displays a signed QR code for the wallet to broadcast. Keystone also offers its own software wallet, Keystone Nexus, for sending, receiving and swapping.
Inside, three secure element chips store seed phrases and fingerprint data separately, and a self-destruct mechanism wipes data when it detects a physical attack. One device can hold three seed phrases, switched by password or fingerprint. Firmware comes in three builds: Multi-Coin (version 3.1.0, dated September 17, 2026, listing 5,500+ assets), Bitcoin-Only, and Cypherpunk for BTC, ZEC and XMR. Updates install over WebUSB or from a microSD card, and each release publishes a SHA256 checksum.
How to start with Keystone
- Order from the official Keystone shop.
- Shipping is free on orders over $30 to the USA, Europe (except Switzerland and Norway) and Australia.
- The box holds the device, a USB-C cable, a user manual and six seed phrase sheets.
- A microSD card is not included, so buy one if you plan to update firmware that way.
- After you create or import a seed phrase and write it down, update to the latest firmware, then pair your software wallet by scanning its connection QR code.
- The Bitcoin-only build needs a firmware upgrade after unboxing.
Keystone fees and limits
- The Keystone 3 Pro costs $149 with one year of Keystone Care+ coverage, $199 with two years and $249 with three.
- Bundles add a microSD card ($170.60) or a wallet pouch ($175.90).
- Steel backup plates are sold separately: Keystone Tablet at $49, Tablet Plus at $69 and Tablet Punch at $39.
There is no subscription. When you send or swap, you pay network fees and whatever the connected software wallet or swap provider charges, since Keystone only signs.
Risks to know before using Keystone
- Keystone is self-custody: if you lose the seed phrase and the device, nobody can restore access.
- Because signing depends on a third-party wallet, a malicious or buggy companion app could show you one thing while asking you to sign another, so read the transaction on the device screen before approving.
- Firmware is public on GitHub, but updates are your job.
- Keystone tells you to back up the recovery phrase before every upgrade, and each release lists a SHA256 checksum you can compare against the file you install.
Keystone alternatives
Other projects people compare with Keystone.
Hardware wallets (Nano, Flex, Stax) from French company Ledger SAS, used with the Ledger Wallet app.
Open-source hardware wallets from Trezor Company s.r.o., part of SatoshiLabs Group, sold since 2013.
Hardware wallets (S1, X1, S1 Pro) plus a free self-custody mobile wallet app.
Card-shaped NFC cold wallet from Swiss company Tangem AG, used by tapping a phone.
Card-shaped cold storage wallet that signs transactions with a tap on an NFC phone.
Hardware wallet line with a fingerprint-based model and a companion mobile app.
Where Keystone ranks on DappAtlas
Listed next to Keystone
- NGRAVE Hardware wallet
Keystone pros and cons
- Keystone 3 Pro lists at $149
- Firmware public on GitHub
- Works with 45+ software wallets, per its site
- Day-to-day use runs through a third-party software wallet
- QR signing adds steps compared with a cable
- Longer coverage plans raise the price to $199 or $249
Keystone FAQ
What is Keystone?
Keystone is an air-gapped hardware wallet with no USB data, Bluetooth, Wi-Fi or NFC; it signs through QR codes. The Keystone 3 Pro lists at $149, has a 4-inch touchscreen and three secure element chips, and its firmware is public on GitHub. It connects to 45+ software wallets such as MetaMask.
Which chains does Keystone support?
Bitcoin, Ethereum and 5,500+ assets.
How much does Keystone cost?
Keystone 3 Pro: $149, according to Keystone’s own page (checked Sep 26, 2026).
Is Keystone available in the US?
Available: terms restrict only sanctioned jurisdictions, according to Keystone’s own page (checked Sep 26, 2026).
Does Keystone hold my funds?
No. Keystone is self-custody: you keep your funds in your own wallet and sign each transaction.
Sources
How this page works
Sources: Keystone: official site, Keystone Shop: Keystone 3 Pro, Keystone: Homepage. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.