SeedCrypt is the offline seed phrase manager that encrypts your mnemonic phrases with military-grade AES-256 and stores them on your hardware — USB key, external disk. Zero cloud. Zero network. Zero compromise.
Most seed-phrase backups fall into 3 buckets: paper, metal plates, or vendor-locked apps. Here's where SeedCrypt fits.
| SeedCrypt | Cryptosteel | Vault12 | Paper backup | |
|---|---|---|---|---|
| Price | €0 → €199 one-time | €99–€199 | $108/year | €0 |
| 100% offline | ✓ | ✓ | ✗ cloud sync | ✓ |
| Multi-device sync | ✓ via USB/QR | ✗ | ✓ cloud | ✗ |
| Fire/water proof | ~ depends on media | ✓ steel | ✓ cloud | ✗ |
| Password protected | ✓ AES-256-GCM | ✗ plaintext | ~ account pwd | ✗ plaintext |
| Vendor lock-in | ✓ open .json | ✓ | ✗ | ✓ |
| Recovery tool | ✓ OSS · Rust | ✗ | ✗ | ✗ |
Disclaimer: based on public information from each vendor as of May 2026. Prices may vary.
No subscription. Pay once, use for life. No activation server required.
A few essential reads on seed phrase security before you encrypt your first one.
12 or 24 words that control all your crypto on every chain. Learn the math behind them and why their security is everything.
Read article → ComparisonMetal plates, encrypted backups, hardware wallets, paper. Which approach actually survives fire, theft, and time?
Read article → SecurityPhotos in iCloud, plaintext in Notes, "shared with family" Dropbox. Every irreversible mistake people make — and how to avoid them.
Read article →Free to start. No sign-up required. Works without an internet connection.
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