E-sign documents by forwarding an email.
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.

Your first 4 documents are free. No credit card needed.

Why switch?

Traditional e-signkysigned
Price$10-65 per user, per month$0.25 per document
SubscriptionOften requiredNone
What you trustThe vendor’s own systemYour email provider’s signature
What signers doClick through their websiteForward one email

How it works

1

Send a PDF

Upload a PDF, add your signers’ emails, send.

2

Signers forward

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.

3

You keep the proof

Every signed document becomes one signing record for you and your signers. Each of you can verify it independently, any time, even offline.

The technical details →

Two ways to use

For signers + small teams

Use kysigned.com

  • Try 4 documents free, no credit card
  • $0.25 per document
  • $5 buys 20 documents, credits never expire
  • Sign in seconds with a passkey or email
  • Same security guarantees as self-hosted

For builders + SaaS

Deploy your own

  • Apache-2.0-licensed public repo
  • Hosted on run402 (same as kysigned.com)
  • Your brand + domain (or a free run402 subdomain)
  • Agent Native: one MCP server drives both deploy & day-to-day ops

kysigned is not a substitute for legal advice. It is your responsibility to determine whether electronic signatures are legally valid for your use case, jurisdiction, and industry. See our Terms of Service.