SeedSigner

DIY stateless Bitcoin signer using air-gapped QR exchange.

seedsigner.com

Zero KYC
Evidence and facts →

DIY stateless Bitcoin signer using air-gapped QR exchange.

Common useMaximum sovereigntyWallet / Privacy ToolsOperator dataUnknown

Identity checksZero KYCNo document check recorded · identity exposure level 0/4

Evidence and riskVerified evidenceStandardMaterial claims checked against current sources.; no material risk recorded in them.

Last reviewedReviewed 28 Sep 2026KYC checked 28 Sep 2026 · unknown jurisdiction · Source → official documentationHow to cite this pageSource coverageVerified evidenceRecorded riskStandard

Evidence and facts

CUNICULA SCORE 4.0

43/100Limited evidencePrivacy 12/25 · Control 0/20 · Transparency 0/20 · Security 25/25 · Accountability 6/10 · Cap 69 · Method

JURISDICTIONUnknown

NOTESeeds stay in memory while powered; settings can persist. Release signatures identify the signer, not the hardware supplier or assembler.

AUDITED BYNo audit listed

OPERATOR DATAUnknown

SOURCE COVERAGE

Verified evidenceTHIRD-PARTY REPORTED2/3Reviewed 28 Sep 2026 · Source → official documentation

LAST CHECKED2026-06-24

LAST UPDATED2026-09-28

Specs

DOCUMENT CHECKNone recorded

IDENTITY EXPOSURELevel 0/4

KYC TRIGGERSNo software account or identity verification required. Hardware purchases may expose payment and delivery identity; building from commodity parts does not eliminate hardware or software-release trust.

FEEFree software; DIY hardware cost varies (project advertises usually under $50)

NETWORKSBTC

CATEGORIESWallet, Privacy Tools

COMMON USESMaximum sovereignty, DIY hardware, Privacy-first cold storage

FEATURESDIY hardware signer, Seeds held in volatile memory, Air-gapped QR signing, Open source, Raspberry Pi Zero and other supported Pi boards, Optional persistent settings, SeedQR backup format, Bitcoin-only

TORNot listed

REGIONSGlobal availability

Review analysis, source material, related services, and history

About

DIY stateless Bitcoin signing device built from Raspberry Pi Zero parts, using air-gapped QR code signing.

Analysis

OVERVIEW

SeedSigner is a DIY Bitcoin signing device assembled from off-the-shelf Raspberry Pi Zero parts for about $50 to $70, built as a stateless design that holds no private key in storage and signs through air-gapped QR codes.

LIMITS

The project has no company or legal entity behind it and runs on volunteer development and Human Rights Foundation grants, so anyone using it takes on the DIY build and firmware verification themselves rather than relying on a manufacturer.

USEFUL FOR

Bitcoin holders willing to assemble their own signing device from commodity parts for cold storage.

Sources · reviewed 2026-07-16

Official site ↗

Corporate identity

Registry-sourced, not audited. The facts below come from cited web research rather than a direct registry query. Each claim links its own source.

Registry research · reviewed 2026-09-28

Frequently Asked Questions

Is identity verification required?

No identity verification is recorded for typical use. No software account or identity verification required. Hardware purchases may expose payment and delivery identity; building from commodity parts does not eliminate hardware or software-release trust.

Which payment methods are accepted?

Accepted payment methods: BTC.

Where is it available?

Recorded availability: GLOBAL.

Is the operator based in a Five Eyes country?

The jurisdiction is not publicly confirmed. Check the provider site for incorporation details.

How are identity, operator, and evidence fields reported?

Identity exposure is level 0 of 4. Hosted operator data has not been established. Jurisdiction is shown as context, not a safety verdict. Source coverage is verified evidence, last reviewed 2026-09-28, and recorded risk is standard.

Which payment networks are supported?

Accepted networks: BTC.

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Sources and history

Service history

Latest meaningful changes to the facts shown on this provider page.

28 Sep 2026
Provider facts reviewed and updated
Corporate / Entity type / Citation, Corporate / Entity type / Note, Corporate / Governance model / Citation, Corporate / Reviewed at, and 10 more
9 Aug 2026
Corporate registry information updated
Corporate
6 Aug 2026
Provider presentation updated
Description, Evidence status, Recorded risk, Trust level

Full service history

28 Sep 2026updated
Provider facts reviewed and updated
Corporate / Entity type / Citation
https://github.com/SeedSigner/seedsignerhttps://raw.githubusercontent.com/SeedSigner/seedsigner/dev/README.md
Corporate / Entity type / Note
Official GitHub README states 'Created and maintained by volunteers. There is no corporation. No profit motive.'; website and other sources describe it solely as a volunteer FOSS DIY project with no registered entity.Official README explicitly states volunteer maintenance, no corporation and no profit motive; this is a project statement, not a registry verification.
Corporate / Governance model / Citation
https://bitcoin.design/guide/case-studies/seedsigner/https://seedsigner.com/
Corporate / Reviewed at
2026-08-092026-09-28
Corporate / Source
corporate identity pass 2, cited web research via grok web searchOfficial README and project website
Features
DIY hardware signer, Stateless (no key storage), Air-gapped QR signing, Open source, Raspberry Pi Zero, No persistent storage, SeedQR backup format, Bitcoin-onlyDIY hardware signer, Seeds held in volatile memory, Air-gapped QR signing, Open source, Raspberry Pi Zero and other supported Pi boards, Optional persistent settings, SeedQR backup format, Bitcoin-only
Fee
~$50-70 (DIY parts)Free software; DIY hardware cost varies (project advertises usually under $50)
KYC last checked
2026-06-222026-09-28
Kyc note
No account. No KYC. Build from commodity parts. No manufacturer trust required.No software account or identity verification required. Hardware purchases may expose payment and delivery identity; building from commodity parts does not eliminate hardware or software-release trust.
Last reviewed
2026-06-222026-09-28
Privacy warning
not setSeeds stay in memory while powered; settings can persist. Release signatures identify the signer, not the hardware supplier or assembler.
Source reviewed
official sitehttps://raw.githubusercontent.com/SeedSigner/seedsigner/dev/README.md
Tagline
DIY stateless Bitcoin signer. Build it yourself. Trust nothing. Own everything.DIY stateless Bitcoin signer using air-gapped QR exchange.
Updated at
2026-03-132026-09-28
Review source: official documentation · public history entry
27 Aug 2026updated
Reconcile score 4.0 evidence
Score assessment / Control model
local-self-custodyunknown
Score assessment / Operator data exposure
limitedunknown
Score assessment / Source model
openunknown
Score review
not setOutcome: HOLD; Checked at: 2026-08-25; Inputs: Operator data exposure: unknown; Control model: unknown; Source model: unknown; Audit: Score eligible: no; Reason: No dated, scoped, current audit citation was normalized in the reviewed packet; legacy auditedBy labels receive no score credit.
Review source: official site · public history entry
26 Aug 2026updated
Apply full-service rereview and score 4.0
Score assessment
not setOperator data exposure: limited; Control model: local-self-custody; Source model: open
Review source: official site · public history entry
9 Aug 2026updated
Corporate registry information updated
Corporate
not setEntity type: project-no-legal-entity; Governance model: maintainer-group; Repository url: https://github.com/SeedSigner/seedsigner
Review source: official site · public history entry
8 Aug 2026updated
Provider summary rewritten
Description
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.DIY stateless Bitcoin signing device built from Raspberry Pi Zero parts, using air-gapped QR code signing.
Review source: official site · public history entry
7 Aug 2026updated
Provider summary rewritten
Card summary
not setDIY stateless signer built from a Pi Zero.
Review source: official site · public history entry
6 Aug 2026updated
Provider presentation updated
Description
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.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.
Evidence status
not setverified
Recorded risk
not setstandard
Trust level
verifiednot set
Review source: official site · public history entry
24 Jun 2026updated
Provider facts reviewed and updated
Checked at
2026-06-222026-06-24
Review source: official site · public history entry
22 Jun 2026updated
Provider facts reviewed and updated
Checked at
2026-03-132026-06-22
KYC last checked
2026-03-132026-06-22
Last reviewed
2026-03-132026-06-22
Source reviewed
older source, not independently verifiedofficial site
Review source: official site · public history entry
22 Jun 2026updated
Ship trust audit remediation pass
Jurisdiction confidence
not setunknown
KYC last checked
not set2026-03-13
Last reviewed
not set2026-03-13
Source reviewed
not setolder source, not independently verified
Review source: older source, not independently verified · public history entry
7 Apr 2026updated
Drop warrantCanary trust signal
Warrant canary
nonot set
Review source: source not recorded · public history entry
29 Mar 2026updated
KYC risk level system + advanced directory filters
KYC level
zero0
Review source: source not recorded · public history entry
14 Mar 2026updated
Offline status bug, vetted grid, news/projects img tags
Status
liveok
Review source: source not recorded · public history entry
14 Mar 2026created
Provider presentation updated
Provider profile
not setcreated
Review source: source not recorded · public history entry

Only fields shown on the provider page are tracked. Private identifiers are never published.

Evidence basis: Claims on this page are linked to published sources for comparison, not certification, audit, endorsement, or recommendation; read the methodology and coverage map before relying on an entry.