COLDCARD Mk5 vs Q: Which Bitcoin Specialist?
Both are Bitcoin-only Coinkite signers with open firmware — Mk5 is the classic workhorse; Q adds a keyboard and larger screen for faster PSBT operations.
Choose COLDCARD Mk5 if you want the standard dual-SE Bitcoin signer at lower cost and can live with a smaller keypad.
Choose COLDCARD Q if you type passphrases or PSBT details often and want a QWERTY keyboard plus larger display for faster operations.
Quick Comparison
| Feature | | |
|---|---|---|
| Price | $189 | $289 |
| Best For | Bitcoin Users | Bitcoin Users |
| Connectivity | microSD, NFC-V, USB-C | microSD, QR code, NFC-V, USB-C |
| Open Source | Mostly open source | Mostly open source |
| Coins Supported | 1+ | 1+ |
| WalletLab Rating | 4.5/5 | 4.6/5 |
Security
- Mostly open source
- Seed model: BIP39 seed generated offline on device
- Secure Element (Microchip ATECC608 and Maxim DS28C36B)
- Optional passphrase (hidden wallet)
Dual secure elements — proven Mk5 generation
- Mostly open source
- Seed model: BIP39 seed generated offline on device
- Secure Element (dual multi-vendor secure elements)
- Optional passphrase (hidden wallet)
Continues dual-SE story with bigger UX for PSBT
Ease of Use
- Beginner score: 6.5/10
- None
- Bitcoin Users
Membrane keypad — deliberate, not fast typing
- Beginner score: 6.8/10
- None
- Bitcoin Users
Physical QWERTY speeds passphrase and PSBT entry
Supported Coins
- 1+
- Bitcoin Users
Bitcoin-only firmware surface
- 1+
- Bitcoin Users
Bitcoin-only — same philosophy as Mk5
Open Source
- Mostly open source
- Firmware is open source
- Reproducible builds supported
Open firmware with PSBT/MicroSD heritage
- Mostly open source
- Firmware is open source
- Reproducible builds supported
Open Coinkite firmware on premium chassis
Mobile Experience
- microSD, NFC-V, USB-C
- iOS and Android apps
- Mobile experience score: 7/10
Air-gapped PSBT — not a phone Bluetooth wallet
- microSD, QR code, NFC-V, USB-C
- iOS and Android apps
- Mobile experience score: 8/10
Still PSBT-centric — keyboard helps, not Bluetooth
Price & Value
- Listed price: $189
- Strong value score in our data
- Mid-range or flagship tier
Lower spend for core PSBT feature set
- Listed price: $289
- Premium positioning
- Mid-range or flagship tier
Premium pricing for keyboard and large screen
Which One Should You Choose?
- Want Bitcoin-only open firmware with dual secure elements at lower cost
- Mostly sign pre-built PSBTs from coordinators without heavy on-device typing
- Run Sparrow or Electrum PSBT workflows with MicroSD/QR air gaps
- Type passphrases or edit PSBT details on-device frequently
- Want the physical QWERTY keyboard to speed up weekly operations
- Run Sparrow or Electrum PSBT workflows with MicroSD/QR air gaps