Billfodl vs Trezor Keep Metal
Key differences
- The Trezor Keep Metal uses a 4-letter seed entry system, while Billfodl uses a tile system.
- The Trezor Keep Metal includes security seals to detect tampering.
- The Billfodl's tile system may be easier for some due to no need for hammering.
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Price
$99
$89
Technical Specifications
Dimensions
100 x 60 x 6 mm
85 x 54 x 1.5 mm
Weight
170g
70g
Materials
316 marine-grade stainless steel
AISI 304 aerospace-grade stainless steel with black surface treatment
Box Includes
Billfodl steel wallet, Instruction manual
Trezor Keep steel wallet, Security seals, Hammer, Instruction manual
Usage
Entry Method
Slide-in stainless steel tiles
Manual punching of first 4 letters
Error Handling
Mistake-friendly → easy to swap tiles, no permanent damage
Permanent → once punched, errors are irreversible
Tools Required
Tool-free, no hammering required
Requires hammer & pre-marking pen (included)
Reusability
Fully reusable (swap tiles anytime)
Single-use → punched letters are permanent
Durability
Fire Resistance
Up to 1,200°C (2,192°F)
Up to 870°C (1,600°F)
Water & Corrosion Resistance
Fully waterproof & corrosion resistant
Water, acid, alkali & corrosion resistant
Real World Proofs
Billfodl survived a real fire, here is a video of the guy whose house burned down.
None available
Compatibility
Backup Types
BIP39 seed phrases
BIP39 / SLIP39 seed phrases
Seed Compatibility
BIP39 (12, 18, 24-word phrases)
SLIP39 (20-word shares)
Wallet Compatibility
All wallets using BIP39
Trezor Safe 5, Safe 3, Model T
Security Features
Tamper Evidence
None included, can buy tamper-evident stickers separately
Tamper-evident security seals included
Company Details
Manufacturer
PrivacyPros
SatoshiLabs
Founded
2017
2023