Head-to-head privacy comparison: KYC friction, trust score, jurisdiction, fees, audits, supported regions, and network support. Higher trust score: SeedSigner.
Chaumian e-cash protocol on Bitcoin Lightning. The mint cannot link sends to receives — genuine transactional unlinkability. CAUTION: each mint is a custodian. If the mint disappears, tokens are worthless. Best for small amounts on trusted mints.
DIY Bitcoin signing device built from off-the-shelf Raspberry Pi Zero parts (~$50-70). Stateless: powers off with no private key storage. Air-gapped QR code signing. The most sovereign hardware option — no trust in any manufacturer.
| Metric | Cashu | SeedSigner |
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| KYC level | Zero KYC | Zero KYC |
| Trust score | 69/99 | 89/99 |
| Jurisdiction | — | — |
| Fee | Free | ~$50-70 (DIY parts) |
| Countries/regions | Global | Global |
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Cashu scores 69/99 and SeedSigner scores 89/99. Use this page as a starting point, then review each provider profile for ownership, warnings, and policy changes.
