kysigned
E-sign documents by forwarding an email. $0.25.
kysigned launched on July 9, 2026 with 13 votes, #1,232 of 24,623 launches that month and more than 90% of that year's launches.
What it does
No signature company to trust. Forward the document, type "I sign this document", and your email provider's DKIM signature, the one that already authenticates your mail, signs it. The proof is one self-contained file anyone can verify offline in a browser: no account, no app, it holds up even if we disappear. We never hold a key, so we can't forge or alter anything. Open source, Apache-2.0: self-host, or use the hosted version. Start with 4 free, then $0.25 a document, no subscription.
Simple, secure signing at $0.25 per document.
Other tools charge a monthly subscription for something your email can already do. Every email you send is already signed by your provider; kysigned turns that into document signatures, so signing is simpler, cheaper, and verifiable by you. Each signer forwards the email back with “I sign this document”. Their own email provider signs that reply, and that signature is the proof. No account, no app. Every signed document becomes one signing record for you and your signers. Each of you can verify it independently, any time, even offline. kysigned is not a substitute for legal advice. It is your responsibility to determine whether electronic signatures are legally valid for your…from kysigned.com
Pricing, as stated on its site
Free tier, paid plans from $0.25/mo — 4 free documents to start, then $0.25 per document with prepaid credit packs ($5 for 20 documents). No subscription required. Self-hosted open source version available for free.
checked October 2026 · prices change
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