Why Perform Stress Tests?      Stress Test Methodology
You may also find this sortable spreadsheet useful.


Device Overall Grade Heat Grade Corrosion Grade Crush Grade Price
Bitkee A A A A $40
Bitplate Domino A A A A £44.50
Bitplate Domino Grande A A A A £50.50
Black Seed Ink A A A A $27
Blockplate A A A A $79
Bulletproof Bitcoin (DIY) A A A A ~$50
Coldbit Steel A A A A €82
Codlkeys S A A A A $30
Crypto Key Stack A A A A $45
Cryptoetch A A A A 50 CHF
Crypto Keys A A A A $30
CryptoTag Thor A A A A $350
Hodlinox A A A A €30
Hodlinox Interlocking A A A A €34
Hodlinox Single Plate A A A A €13
Hodlrock Rock96 A A A A $74
Quadrat Register P A A A A €366
Quadrat Register 11 A A A A €149
Safe Seed A A A A $28
SeedSteel A A A A N/A
Seedplate A A A A $50
Simbit A A A A $110
Smallseed A A A A 48 CHF
Steel Wallet (DIY) A A A A ~$20
Steelwallet A A A A €65
Tjernlund CC3P A A A A $40
Coldbit Passphrase A- A B A $15
Cryptosteel Capsule A- A A B $109
CryptoVault A- A B A $35
Hodlr Swiss A- A A B €119
Keyois Capsule A- B A A $99
SAFU Ninja (DIY) A- A A B $15
SteelKi A- B A A $24
Cypherwheel B+ A A C $250
CryptoSteel Cassette B B A D $90
Keystone Tablet Punch B A D A $24
Billfodl C C A D $55
Cobo Tablet C F A D $39
Cold Storage Coins C F B B $20
ColdTI C D C A $21
Keystone Tablet Plus C F A A $49
Blockstream Metal D A F - $80
The HODL Wallet D A F - N/A
The Steely D F A F $70
Ballet Crypto F F F F $35
BitHD Frozen Armor F F F - $30
Bunkeroid F F F - $130
Ellipal Mnemonic Metal F F F - $50
Steeldisk F F F - N/A

There are too many choices, how do I choose?

  1. Avoid using devices where the device manufacturer knows your private key. Such as Keyois Capsule, Cold Storage Coins, and Ballet Crypto. In some cases it’s possible to have a manufacturer create a BIP38 encrypted backup, which is safe.
  2. Simpler is better - more pieces means more potential points of failure.
  3. The best bang for your buck are the single plates with grids for center punched dots such as Bitplates, Blockplate, CodlKeys, Crypto Keys, Smallseed, or Steelwallet
  4. The most durable device I’ve tested is the Quadrat Register

NOTE: this is an open source project! If you find any out-of-date information such as incorrect prices or broken links, please submit an issue.

Are you a device manufacturer who would like me to test your product? Send me a message!