E-signature software for individuals and small teams. Upload a PDF or Word file, place fields, add signers, send. Completed documents are PKI-sealed with trusted timestamps and carry a Certificate of Completion. Designed to meet ESIGN and UETA.
A startup from Jacksonville, the United States.
This page is designed to help you find out whether HankoSign is good and if it is the right choice for you.
HankoSign is electronic signature software for people who need documents signed, not a platform to administer. Upload a PDF or Word document, place the fields, and send. Signers receive an email and sign in their browser — no account, no app, no download.
HankoSign is designed to meet the federal ESIGN Act (15 U.S.C. § 7001) and the Uniform Electronic Transactions Act (UETA), adopted in 49 states and D.C. Completed documents are digitally sealed using PKI, so any later alteration is detectable, with trusted timestamps issued by a third-party timestamp authority. Every completed envelope carries a Certificate of Completion — recording who signed, when, and from which IP address, along with a SHA-256 hash of the signed content — appended inside the signed PDF itself, so the evidence travels with the document.
Included on every plan, including the free tier: PDF and Word upload with automatic conversion, multiple signers signing in sequence or in parallel, signed PDFs downloadable individually or as a zip, and the full audit trail.
Paid plans add reusable templates and folders, the ability to collect documents back from signers, and a REST API with HMAC-signed webhooks.
Built and operated independently.
Listed in
Cloud-native serverless architecture on AWS, built with Node.js. Documents are signed using PKI with RFC 3161 timestamps from a public timestamp authority, producing standards-conformant PDFs that validate in Adobe Acrobat. Billing is handled by Stripe.
Most e-signature tools attach a signature image and store the audit trail on their own servers. HankoSign seals each completed document with a PKI digital signature and a trusted timestamp from a third-party timestamp authority, then appends the Certificate of Completion inside the signed PDF itself. The evidence travels with the file — anyone can open it in Adobe Acrobat and confirm it hasn't been altered since signing, without an account and without involving us.
It's also built and run by one developer, which is why the pricing looks the way it does. The API and webhooks are on a $49/month plan rather than an enterprise contract.
Price and scope. If you need documents signed and don't need a contract-lifecycle platform, most of what you'd pay for elsewhere is capability you won't use. HankoSign starts free, paid plans start at $7/month, and the REST API with HMAC-signed webhooks is included at $49/month.
Where it won't be the right choice: there's no HIPAA compliance or BAA, no SAML SSO, and no white-labeling. If you need those, buy the enterprise product.
Individuals, solo operators, and small teams who send documents for signature regularly but don't have procurement, a legal department, or an IT administrator. Also developers who want signature capability in their own product without an enterprise sales cycle — the REST API and webhooks are documented publicly at hankosign.com/developers.
Built by an independent developer who wanted e-signature that was priced for one person and produced documents whose authenticity could be verified without trusting the vendor. A hanko is the personal seal used in Japan in place of a signature — the name comes from the idea that a document should carry its own proof.
Launched publicly in August 2026. Not affiliated with Hanko (the open-source authentication project) or Hanko AI.
We have collected here some useful links to help you find out if HankoSign is good.
Check the traffic stats of HankoSign on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of HankoSign on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of HankoSign's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of HankoSign on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
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