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.
| Coldcard | SeedSigner | |
|---|---|---|
| Category | wallets | wallets |
| Subcategory | Hardware | Hardware |
| Grade | A | A |
| Editor's Pick | — | — |
| Tagline | Bitcoin-only hardware wallet by Coinkite. Air-gapped via PSBT-on-SD. Reference signer for Bitcoin maxis. | DIY air-gapped Bitcoin hardware wallet built on Raspberry Pi Zero. No firmware secrets, no vendor lock-in. |
| Fees | $120 hardware · Bitcoin-only · PSBT-via-SD | ~$50 DIY parts · open-source · stateless |
| KYC posture | light_kyc | anonymous_signup |
| Highlight tags | HARDWAREBTC-ONLYPSBT | HARDWAREDIYOPEN-SOURCE |
| Feature tags | non_custodialopen_sourcemultisig_supportedaudited | non_custodialopen_sourcemultisig_supportedauditedfull_node_capable |
| Web | https://coldcard.com | https://seedsigner.com |
| Tor | — | — |
| Last verified | 2026-05-13 | 2026-05-13 |