COLDCARD Mk5Coinkite · Hardware wallet
Notice from the maker's repository. Coinkite's firmware repository carries a security advisory: versions from 2021 to July 2026 produced poor entropy; seeds generated in that period should be regenerated on 5.6.0 (Mk4/Mk5) or 1.5.0Q (Q) or later and funds moved. Source · checked 2026-11-13
$219
list price, checked 2026-11-13List price
$219 sourcechecked 2026-11-13Store price on the check date; the store shows $269 struck through.
Coins and tokens
Bitcoin only sourcechecked 2026-11-13
Chains named by the maker
Bitcoin-only edition
Yes sourcechecked 2026-11-13
Firmware source
Source published · MIT + Commons Clause sourcechecked 2026-11-13Source is published; the Commons Clause forbids selling it, so it is not an OSI open-source licence.
Reproducible build
Documented by the project sourcechecked 2026-11-13
Secure element
Yes · 2 chips sourcechecked 2026-11-13Microchip ATECC608 + Maxim DS28C36B
Connections
USB-C, NFC, microSD sourcechecked 2026-11-13
Air-gapped signing
Yes sourcechecked 2026-11-13Signs by QR code or microSD, without a cable or radio link.
Screen
Screen under Gorilla Glass, numeric keypad sourcechecked 2026-11-13
Backup
not verified
Passphrase
Yes sourcechecked 2026-11-13
Company location
not verified
Latest firmware
5.6.3
Released 30 Sept 2026 · 44 days ago
Checked by hand on 2026-11-13. Source · all versions
Fact scores
Sums of the facts on this page with fixed weights — formula. Not a review.
Security facts
70
| Firmware source published (open 30, restricted licence 20, partly 10) | 20 / 30 |
| Reproducible build documented | 10 / 10 |
| Secure element chip | 20 / 20 |
| Secure element certification stated (EAL5+ or higher) | 0 / 10 |
| Can sign without cable or radio (QR or microSD) | 10 / 10 |
| Bitcoin-only firmware or edition available | 5 / 5 |
| Passphrase supported | 5 / 5 |
| Multi-share (Shamir) backup | not verified · 0 / 10 |
Ease facts
45
| Touchscreen | 0 / 30 |
| Screen of 2 inches or more | 0 / 15 |
| Wireless link to a phone (Bluetooth or NFC) | 25 / 25 |
| USB data connection | 10 / 10 |
| QR code signing | 0 / 10 |
| microSD slot | 10 / 10 |
Value (points per $100)
26
Not affiliated with Coinkite. Values can change after the check date — confirm on the manufacturer's page before buying.