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kysigned

Live

Lets you e-sign a document by forwarding it via email, using your provider's DKIM signature as proof instead of a signing company; open source, self-hosted or hosted, pay-per-document.

No sign-upWorks offlineOpen sourceNo subscription

What to know▼

How it works

Forward a document to the service and type 'I sign this document' — your email provider's existing DKIM signature becomes the proof of signing, bundled into one self-contained file anyone can verify offline in a browser.

What's different

No third-party signing company is trusted with the signature — the proof relies entirely on infrastructure (DKIM) that already exists and would still verify even if this service disappeared.

Pricing

4 free signatures, then $0.25 per document, no subscription. Open source (Apache-2.0) — self-host or use the hosted version.

Best for

People who need a lightweight, verifiable e-signature for occasional documents without paying for a full e-signature platform subscription.

Watch out

The provider states it never holds a signing key and can't forge or alter documents — that's the product's own security claim, not independently audited.

Watched for 27 days · last checked 12d ago

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