COLDCARD vs OneKey: Security Architecture, Supported Assets, and Use Cases Compared
Key Takeaways
- For most users who need Bitcoin, multiple chains, mobile, desktop, SignGuard, and QR AirGap together, OneKey Pro is the more complete choice for everyday use.
- COLDCARD Q emphasizes QR, dual microSD, and a keyboard, while Mk5 emphasizes compact microSD/NFC use. Both are better suited to specialist Bitcoin-only workflows.
- If a legacy COLDCARD recovery phrase falls within the scope of the official 2026 advisory, create a completely new recovery phrase on OneKey Pro and migrate through an on-chain transaction; do not import the old phrase directly.
FAQ's
OneKey Pro is better for most users. It combines four EAL6+ secure chips, QR AirGap, fingerprint authentication, SignGuard, a cross-platform app, multichain management, and switchable Bitcoin-only. COLDCARD is better suited to specialist users who manage only Bitcoin and already know microSD and PSBT workflows.
OneKey Pro can switch to Bitcoin-only mode, where the interface retains only Bitcoin-related functions, and it can return to standard mode when needed. COLDCARD is permanently Bitcoin-only by product design.
Q has a larger screen, a full QWERTY keyboard, a QR camera, dual microSD, NFC, and support for AAA batteries. Mk5 is smaller and uses a numeric keypad, one microSD, NFC, and USB-C, with no QR camera.
Both COLDCARD Q and OneKey Pro support QR. Q is more closely aligned with Bitcoin PSBT and third-party coordinators. In addition to QR AirGap, OneKey Pro provides a large touchscreen, OneKey App, SignGuard, multiple chains, and switchable Bitcoin-only. COLDCARD Mk5 does not scan QR codes.
If the legacy recovery phrase falls within the official affected scope and does not qualify for an exception, you must create a new recovery phrase and migrate on-chain. Importing the old phrase into OneKey only restores the same private keys and cannot repair the old entropy.
