Compare providers
Side-by-side comparison for any two listings. Pick by provider id (e.g. mullvad, ivpn, feather). Updates live as curators re-grade.
| SeedSigner | Coldcard | |
|---|---|---|
| Category | wallets | wallets |
| Subcategory | Hardware | Hardware |
| Grade | A | A |
| Editor's Pick | — | — |
| Tagline | DIY air-gapped Bitcoin hardware wallet built on Raspberry Pi Zero. No firmware secrets, no vendor lock-in. | Bitcoin-only hardware wallet by Coinkite. Air-gapped via PSBT-on-SD. Reference signer for Bitcoin maxis. |
| Fees | ~$50 DIY parts · open-source · stateless | $120 hardware · Bitcoin-only · PSBT-via-SD |
| KYC posture | anonymous_signup | light_kyc |
| Highlight tags | HARDWAREDIYOPEN-SOURCE | HARDWAREBTC-ONLYPSBT |
| Feature tags | non_custodialopen_sourcemultisig_supportedauditedfull_node_capable | non_custodialopen_sourcemultisig_supportedaudited |
| Web | https://seedsigner.com | https://coldcard.com |
| Tor | — | — |
| Last verified | 2026-05-13 | 2026-05-13 |