Top Sites>COLDCARD - Most Trusted Bitcoin Signing Device

User-agent: *
Allow: /

Disallow: /errors/
Disallow: /2fa
Disallow: /admin/
Disallow: /static/coldcard-pushtx.html

Sitemap: https://coldcard.com/sitemap.xml
LLMS-txt: https://coldcard.com/llms.txt
LLMS-full: https://coldcard.com/llms-full.txt

# COLDCARD

> COLDCARD is a Bitcoin-only signing device (hardware wallet) by Coinkite Inc.
> This file provides live, AI-friendly context for products, firmware, and documentation.

## Live stats


- Firmware files indexed: 113
- Platforms covered: 8
- Latest release date: 2026-03-25

## Top firmware platforms (live)

- 1. COLDCARD Mk4 (MK4): 43 files, latest 5.4.5
- 2. COLDCARD Q (Q1): 40 files, latest 1.4.0Q
- 3. COLDCARD Mk3/Mk2 (MK3): 12 files, latest 4.1.9
- 4. EDGE_MK4 (EDGE_MK4): 9 files, latest 6.4.1X
- 5. EDGE_Q (EDGE_Q): 5 files, latest 6.5.0QX


## Key links

- Product pages: https://coldcard.com/q and https://coldcard.com/mk5
- Downloads: https://coldcard.com/downloads
- Documentation: https://coldcard.com/docs/
- F.A.Q: https://coldcard.com/faq
- Hardware wallet comparison: https://coldcard.com/docs/compare-other-wallets/ (full table in llms-full.txt)
- AI context JSON: https://coldcard.com/api/ai-context
- Full AI context: https://coldcard.com/llms-full.txt

## Special Pages
- [About Coldcard](https://coldcard.com/special/about-page): Coldcard devices are Bitcoin-only hardware wallets made by Coinkite Inc. in Toronto, Canada. They are built on three core security principles: Bitcoin-only, air-gapped signing, and open-source verifiable firmware.
- [COLDCARD FAQ](https://coldcard.com/special/coldcard-frequently-asked-question): Frequently asked questions about COLDCARD — seed words, PINs, firmware upgrades, backups, secure elements, PSBT, and more.


## Compare Wallets
- [Coldcard vs Ledger Nano X](https://coldcard.com/compare/coldcard-vs-ledger-nano-x): Open-source firmware, proprietary app dependency, and what each approach means for your ability to verify what runs on your device.
- [Coldcard vs Trezor Safe 7](https://coldcard.com/compare/coldcard-vs-trezor-safe-7): Air-gapped signing, what it requires, and how each device handles the boundary between the signing environment and the internet.
- [Coldcard vs Bitkey](https://coldcard.com/compare/coldcard-vs-bitkey): The difference between full self-custody and collaborative custody, and what each model means for who controls your keys.
- [Coldcard vs Blockstream Jade Plus](https://coldcard.com/compare/coldcard-vs-jade-plus): Two approaches to key protection: a dedicated secure element versus a blind oracle model, and the differences between the two.
- [Coldcard Q vs. Mk5](https://coldcard.com/compare/coldcard-q-vs-mk5): How the two devices differ in form factor, interface, and signing workflow, and what those differences mean for day-to-day use.


## Learn Center
- [How to Think About Bitcoin Security: A Threat Modeling Primer](https://coldcard.com/learn/bitcoin-security-threat-model): Threat modeling is the practice of identifying what you are protecting, who might try to take it, and what defenses are proportionate. Here is how to apply it to Bitcoin self-custody.