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Wallets / SeedSigner
HARDWARE WALLET REALITY CHECK · READ 11 OCT 2026

SeedSigner: what the sources say

Current 0 disclosed weaknesses 0 company incidents

Key facts

The questions, with sources

QuestionWhat the sources saySource
Status
Current — Not a manufactured product: users build it from off-the-shelf parts. GitHub releases list 0.8.7 as latest (page shows 08 Jul without a year; it follows 0.8.5 of Feb 2025). No official store or vendor exists.
Company
No company. Community open-source project; seedsigner.com says there are no official or approved vendors and mentions a development fund jointly managed by five stakeholders.
List price
$50 — No product price. Project states the device can be built for 'less than USD 50' (ceiling, not a measured total); the official parts list names retailers but gives no prices. Parts: Raspberry Pi Zero (v1.3 preferred), Waveshare 1.3 inch 240x240 LCD HAT, Pi Zero camera, microSD card.
Secure element
No: Raspberry Pi Zero (general purpose single-board computer)
Firmware code
Yes (MIT); reproducible build: yes. Release images are reproducible: WalletScrutiny confirmed hash matches for 0.8.5 (Feb 2025) and 0.7.0 (2023). Users build/verify their own images; release verification is the user's responsibility.
Companion app
Not verified. SeedSigner has no companion app of its own; it signs via QR codes with third-party wallets (Sparrow, Nunchuk, Keeper, BlueWallet, Specter Desktop).
Connections
USB: n/v. Bluetooth: no (Pi Zero v1.3 has none; Zero W can be modified to disable wireless). NFC: n/v. QR: yes (camera in, QR codes on screen out). microSD: used for the operating-system image; project advises removing it before loading a seed.
Screen
Waveshare 1.3 inch LCD, 240x240, with buttons/joystick; touch: no (button controls)
Assets
Bitcoin only (mainnet, testnet, regtest); Bitcoin-only option: yes (Bitcoin-only by design)
Multisig and PSBT
Yes. Single-sig and multisig xpub export; PSBT review before signing.
Passphrase
Yes. BIP39 passphrase (word 25) supported.
Shamir backup (SLIP-39)
Not verified. No SLIP39 found. A SeedXOR request (issue #43) says maintainers do not currently plan it; issue date not read.
Recovery phrase standard
BIP39 12/24 words; SeedQR; BIP85 child seeds
Optional recovery service
None. No company and no vendor service exist; the project says there are no official vendors.
FIDO / passkeys
Not verified. Not mentioned on the pages read.
—
Bug bounty
Not verified
—
Warranty
No manufacturer and no warranty issuer; devices are self-assembled.
—

"n/v" or "not verified" means we could not confirm it from a source we could read. Maker claims are marked as such. Confirm on the maker's site before you buy. Education only, not investment advice.

Summary

Five facts

  • SeedSigner is an open-source DIY signing device built from a Raspberry Pi Zero, a camera and a 240x240 LCD; there is no company behind it [source 3].
  • The project's stated goal is a build cost below USD 50; the parts list gives no prices [source 2].
  • Firmware is MIT-licensed and WalletScrutiny verified release images 0.8.5 and 0.7.0 as reproducible [source 5].
  • It uses no secure element; it is air-gapped via QR codes and holds seeds only in memory [source 2].
  • Supports BIP39 passphrase, multisig xpub export and PSBT signing for Bitcoin only [source 2].
Independent checks

Audits

  • No independent audit found in our search.
Device record

Publicly disclosed weaknesses

  • No publicly disclosed weakness found in our search. That is not proof there is none.

Disclosed weaknesses are listed whatever their severity. "Funds lost" is what the sources say. "Fixed" means the source states a fix exists, which only helps if you update.

Company record

Incidents at the maker or its service providers

  • No company incident found in our search.

These affect the company or its customers and apply to every device of the brand. They are not weaknesses of this device.

Questions

Questions about SeedSigner

Is SeedSigner safe?

We do not give a yes or no, because safety depends on what you need to protect and on facts that change. We found 0 publicly disclosed weaknesses and 0 company incidents in our search. Read the sources above before you buy.

Does SeedSigner need an internet connection?

Signing happens on the device. How the device talks to your phone or computer depends on its connections: QR. The companion app or software that builds the transaction is online.

Who found the weaknesses listed for SeedSigner?

The page names who disclosed each one when the source does. Several were found by a competing maker's research team or by independent security firms. We cite the affected company's own statement where we found one, and label press-only reports.

Sources

Where this comes from

Not verified: No security audit, CVE, bug bounty or incident was found in the searches and fetches done; this is not proof of absence (releases page labels no change as a security fix). Retail price of parts not verified (project gives only a 'less than USD 50' target). Release year of 0.8.6/0.8.7 not shown on the releases page. Companion apps' licences, Shamir/SeedXOR status, FIDO and warranty not verified.

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