Coldcard MK4

Name: Coldcard MK4
Brand: Coinkite
Rating: 4.8 (53 reviews)

Security warning: Wallets created on affected Coldcard Mk4 firmware are not secure and should be migrated to a newly generated seed.

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4.8/5.0

53 Reviews

About Coldcard MK4

Security warning, August 2026: Coinkite has confirmed a serious seed-generation flaw affecting Coldcard Mk4 firmware before standard version 5.6.0. Updating the device does not secure a seed created on affected firmware. Users should follow Coinkite’s official guidance, generate a new seed using fixed firmware and carefully migrate their funds. https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/

Rated 4.8/5.0

based on 53 reviews

Showing 15 of 53 Reviews

ysakmusic

Jul 10, 2024

The Coldcard MK4: A Top-Notch Bitcoin Wallet Experience

The Coldcard MK4 is the best Bitcoin wallet I've used to date. Although it's not strictly FOSS, the code is open for review and audit, which is reassuring. It's also fairly easy to learn how to use wi...

lanter

Mar 12, 2024

Quite the best (if you know your business)

You should use coldcard if your only concern is storing your coins in the coldest, darkest place possible. Opensource, extremely safe, airgapped, etc. The more costly M4 is justified by its cool NFC c...

btckay

Mar 1, 2024

Best Cold Storage Hardware Wallet out there

The Coldcard MK4 is the best Bitcoin wallet I've used to date. Although it's not strictly FOSS, the code is open to review and audit, which is good.Also, it's fairly easy to learn how to use, if you p...

natoshi

Jan 25, 2024

Excellent experience, highly-recommend

When I first started researching potential signing devices years ago, I was initially drawn to flashier options and almost laughed off the Coldcard because it looked like a grade school calculator. I'...

shanetrammel

Jan 18, 2024

MK4 Review

I love all the features supported by the MK4. It has USB-C for power and data if you like. The USB Virtual Disk Mode can be useful. It supports BIP85 and you can create multiple wallets using pass phr...

xhonf0d

Nov 21, 2023

Amazing wallet and amazing customer service

I bought my first coldcard and I set this up following a YouTube video (there are many of those) and it was very straight forward. Setup was done as part of a multisig and it was straightforward (not ...

coinmagzine

Nov 19, 2023

Effortless Security: Unlocking Seamless Transactions with Advanced Keypad Protection

Entering extensive passwords and PIN codes is a breeze with the keypad, offering users a seamless experience in confirming transactions. The incorporation of a secure element adds an extra shield of p...

poncho

Nov 19, 2023

Great Wallet After Initial Learning Curve

The Collecard is generally considered to be the best hardware wallet on the market, both in terms of security and reputation. It can be quite nerve wracking the when you first use it but there are ple...

charlotte

Nov 14, 2023

Easy to Hide

It comes with a protective plastic case to protect your hardware and coins.it's easy to Hide.Support for Other Wallets Several Bitcoin wallets have built-in Coldcard support such as sparrow, specter e...

hyperbitcoinization

Nov 12, 2023

Not the most beginner friendly but good reputation and lots of pro features.

It's not the most beginner friendly wallet for sure, but it's got the best reputation in the industry. Built using open source software too. It has many pro features like decoy PIN. If you are genuine...

noah12

Nov 10, 2023

The keypad allows for users to easily enter lengthy passwords and PIN codes

The keypad allows for users to easily enter lengthy passwords and PIN codes, as well as to easily confirm transactions. The secure element offers an extra layer of security, which makes it impossible ...

jcdenton

Nov 3, 2023

Simply the best

Coinkite are the best hardware company in the bitcoin space, and this is the best hardware wallet. The coldcard is incredibly full-featured and a joy to use - I have a mk3 as well and the mk4 means it...

retrokernflux

Nov 2, 2023

wonderful device.

this device is daunting at first...but you know that you are dealing with a serious piece of hardware. signing first transaction is exhilerating. the only problem is that once you get one, you start d...

lcse

Oct 19, 2023

Good for me

It's simple to use if you pay attention and be careful. The security possibility is delightful and motivated me to purchase.

0v030oa

Oct 18, 2023

the best hardware wallets you can get

Simply the best hardware wallets you can get your hands on. Top security fully air-gapped and still simple to use.