Which one is right for you?

Bitkey vs. Coldcard (MK4)

Which one is better in 2025? In-depth comparison of Bitkey and Coldcard (MK4)

Bitkey and Coldcard (MK4) are two popular hardware wallets with different costs, ease of use, and compatibility.

We've compared Bitkey head-to-head with Coldcard (MK4) to help you decide which is best for your needs.

	Select a product	Select a product
	Bitkey	Coldcard (MK4) 1
Connectors	USB-C	USB-C
Wireless	NFC	NFC
Seed Phrase	—	BIP39
Release Year	2024	2022
Features	—	Air-gapped PSBT
Works With	—	BTCPAY Bitcoin Core BlueWallet COLDCORE Casa Electrum Sparrow Wallet Specter Desktop Wasabi Wallet
Compatible With	Android iOS	—
Coins	Bitcoin (BTC)	Bitcoin (BTC)
Display Type	—	OLED
Display Resolution	—	128 x 64
Battery Type	Lithium-ion	—
Battery Capacity	330mAh	—
Open Source	—	Yes
Secure Elements	—	ATECC608A DS28C36B
Size	56 mm x 62 mm x 13 mm	—
Weight	65g	—
Materials	Corian and stainless steel	—