Indestructible Seed Phrase Backup in Stainless Steel
Cryptosteel Capsule is not a hardware wallet but a physical seed phrase backup device. It stores your BIP39 recovery words on stainless steel letter tiles locked inside a cylindrical capsule that is fireproof (up to 1400C), waterproof, and resistant to physical damage. This solves the critical weakness of paper seed phrase backups, which are vulnerable to fire, water, and degradation.
Specifications
Cryptosteel Capsule Solo
- Stainless steel construction rated to 1400C
- Stores up to 24 BIP39 recovery words
- Waterproof and corrosion resistant
- Tamper evident sealed design
- Compatible with any wallet that uses standard seed phrases
Strengths
- Virtually indestructible seed phrase storage
- Works with every hardware wallet on the market
- No electronics means no firmware vulnerabilities
- One time purchase with no ongoing costs or batteries
Considerations
- Does not sign transactions (not a wallet)
- Physical possession is the only security (no encryption)
- Must be stored in a secure location like a safe
Our Verdict
Every hardware wallet owner should have a metal seed phrase backup. The Cryptosteel Capsule is one of the best available. Paper burns. Steel does not. Pair this with any hardware wallet for a complete cold storage solution.
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