Wallet directory
Coldcard
Best for: Air-gapped cold storage
Bitcoin-only hardware signer built for air-gapped use (PSBT via SD card or NFC). Verifiable source; the security-maximalist choice.
Coldcard is a Bitcoin-only hardware signer built for air-gapped use — you move transactions by microSD card or NFC rather than plugging into a computer. Its firmware is verifiable and its threat model is uncompromising.
It is the security-maximalist’s cold-storage device, with features (duress PINs, seed handling options) aimed at people protecting serious amounts. That focus makes it less hand-holding than some rivals; if air-gapped, verify-everything storage is your goal, it is a reference choice.
Other self-custody wallets
Aqua
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BitBox02
Bitcoin-only hardware, simple setup
Bitkey
Beginners who want self-custody with recovery built in
Blockstream App (Green)
One wallet from mobile starter to Jade-paired cold storage
Blockstream Jade
Open-source hardware on a budget
BlueWallet
Simple on-chain mobile + watch-only
Quick answers
- Is Coldcard custodial or self-custody?
- Coldcard is self-custodial — you hold the keys, and no company can freeze or move your bitcoin.
- Does Coldcard require KYC?
- No — Coldcard requires no identity verification to use.
- Does Coldcard support Lightning?
- No — Coldcard is on-chain only.
- Is Coldcard open source?
- Yes — Coldcard's client source code is published for review.
- What platforms does Coldcard run on?
- Coldcard runs on Hardware.
Facts describe the core product and can change — always verify on the official site before moving significant sats. Got it set up? Find places that take Bitcoin near you or check your country's Bitcoin tax rules.