kysigned - E-Signatures at 25 Cents per Document

E-signatures at $0.25 an envelope, no subscription required.

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Updated Jul 2026 · Added Jul 2026

kysigned.com

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What is Kysigned?

kysigned offers affordable e-signatures at $0.25 per envelope without subscription fees. It uses DKIM, the signature standard built into every email provider, making signing simple and secure. Signers just forward an email back with their approval - no accounts or apps needed. Perfect for small teams, individuals, and builders who want verifiable, legally sound digital signatures.

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Key Features of Kysigned

DKIM-based digital signatures
No subscription fees
Pay-per-envelope model ($0.25 each)
4 free envelopes to try
No account required for signers
Offline verifiable signatures
Self-hosted deployment option
Apache-2.0 open source
Passkey and email sign-in
MCP server for deployment

Who Should Use Kysigned?

Small teams needing affordable e-signatures

Individuals signing documents occasionally

Builders integrating signatures into SaaS products

Organizations wanting vendor-independent signature verification

Businesses avoiding monthly subscription costs

Kysigned: Pros & Cons

✓Pros

Extremely affordable at $0.25 per envelope
No subscription lock-in
Signatures verifiable forever, even if service shuts down
Simple process - signers just forward an email
Built on trusted email provider infrastructure (DKIM)
Open source and self-hostable
No credit card required for trial
Credits never expire

✕Cons

User responsible for determining legal validity in their jurisdiction
Not a substitute for legal advice
Requires signers to use email (may not suit all workflows)

Frequently Asked Questions about Kysigned

How much does kysigned cost?

kysigned charges $0.25 per envelope with no subscription required. You can try 4 envelopes free without a credit card, and $5 buys 20 envelopes with credits that never expire.

How do signers sign documents?

Signers receive a link to the document and simply forward the email back with "I sign this document". Their email provider's DKIM signature is the signature - no account or app needed.

What happens if kysigned shuts down?

All signatures remain verifiable forever because they are based on DKIM, your email provider's standard signature. The signing record is independent of kysigned's service.

Can I self-host kysigned?

Yes, kysigned is Apache-2.0 licensed and open source. You can deploy your own instance on run402 with your own domain or a free run402 subdomain.

Is kysigned legally valid?

kysigned is not a substitute for legal advice. You are responsible for determining whether electronic signatures are legally valid for your use case, jurisdiction, and industry.