The Billfodl
Summary
Everything this seed backup solution supports, grouped by category.
Privacy Pros makes the Billfodl, a stainless steel seed phrase backup device in a slim cassette form. Made from marine-grade 316 stainless steel, the Billfodl uses lettered tiles to record the first four letters of each word and supports BIP39 seeds of 12, 18 or 24 words, storing up to 96 characters. The device keeps seeds and keys offline and is designed to be fireproof, waterproof and shockproof.
Every spec, organized
Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.
Payment Methods to buy the device
Which methods of payments you can use to buy the device on the official website
BTC On Chain
YES (via Coinbase Commerce)
Accepts Bitcoin payments via on-chain transactions.
BTC Lightning
NO
Accepts Bitcoin payments via the Lightning Network for faster and cheaper transactions.
Alt Coins
YES (via Coinbase Commerce)
Accepts payments in alternative cryptocurrencies other than Bitcoin.
Credit/Debit Card
YES
Accepts traditional credit and debit card payments.
Size & Materials
Weight
480g / 16.9oz
Dimensions
253 x 182 x 27 mm
Length x Width x Height
- Length: the longest side of the device
- Width: the shorter side of the device
- Height: the vertical dimension of the device
Materials
Stainless Steel
Include All Tools
YES
Whether all necessary tools for setup and engraving are included in the package.
Water-proof
YES
Resistant to water damage and can withstand flooding or water exposure.
Fire-proof
Partially
Resistant to high temperatures and fire damage, protecting your seed phrase in case of fire.
Official Documentation
Industrial-grade stainless steel plates can resist fire and temperature as high as 2649 °F / 1454 °C.
Crush-proof
NO
Resistant to physical crushing and compression forces.
Official Documentation
Corrosion-proof
YES
Resistant to corrosion from chemicals, salt water, and environmental factors.
Shock-proof
?
Resistant to impact and shock damage from drops or physical trauma.
Stress tests
YES
Has undergone rigorous stress testing to verify durability claims.
Official Documentation
Security
PIN Protection
NO
Offers PIN-based access control to protect your seed phrase from unauthorized access.
Encrypted Backup
NO
Supports encrypted storage of your seed phrase for additional security.
Tamper Evident Seal
Partially
Features tamper-evident sealing to detect if the backup has been compromised.
Official Documentation
2 include-all-tools. The device has 2 holes that you can use to secure with padlocks (not included)
Capacity
Multiple Private Keys
NO
Supports storing multiple seed phrases or private keys in a single device.
Backup Compatibility
Output Descriptor
NO
Supports backing up wallet output descriptors that define how to generate addresses and spend funds.
12 Words BIP-39
YES
Supports backing up 12-word BIP-39 seed phrases.
24 Words BIP-39
YES
Supports backing up 24-word BIP-39 seed phrases.
Seed QR
NO
Supports backing up seed phrases encoded as QR codes.
Shamir Backup SLIP-39
1 share
Supports backing up Shamir's Secret Sharing scheme (SLIP-39).
Hexadecimal Strings
NO
Supports backing up hexadecimal strings.
ASCII Strings
YES (up to 96 chars)
Supports backing up ASCII text strings.
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