OpenSign

The free and open source alternative to DocuSign

About OpenSign

OpenSign is an open-source electronic signature platform for signing, storing, and securing PDF documents in one place. Its free plan offers unlimited e-signatures, free collaboration with multiple signers, and completion certificates with access logs at no cost, plus a secure document vault. It can be used as a hosted service or self-hosted, making it an alternative to DocuSign for individuals and businesses that send contracts and agreements regularly.

OpenSign website preview

Live preview of opensignlabs.com via the WordPress mShots service — it can take a few seconds to generate on a first visit.

OpenSign: strengths & things to check

Strengths

Free tier available — you can start without paying (freemium model).
Covers e signature, documents, pdf, open source — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

The full feature set sits behind a paid plan — check which limits the free tier carries on the official site before committing.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 2092 tools in the Productivity & Notes category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

OpenSign pricing

Pricing model	Freemium — a free tier lets you start, and paid plans are available if you need more.
Free access	Yes — free tier, paid upgrades available
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	opensignlabs.com

OpenSign key facts

Category: Productivity & Notes
Pricing: Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas: e signature, documents, pdf, open source
Official site: opensignlabs.com

OpenSign FAQ

How much does OpenSign cost?

Freemium — a free tier lets you start, and paid plans are available if you need more. Current plans and prices are listed on the official site (opensignlabs.com).

What is OpenSign used for?

The free and open source alternative to DocuSign Its focus areas in the Productivity & Notes category: e signature, documents, pdf, open source.

Where can I try OpenSign?

On its official site, opensignlabs.com — the Visit Official Site button above goes straight there.

OpenSign vs alternatives

	OpenSign	DocuSeal	Apache OpenOffice	Chat with PDF
Pricing	Freemium — a free tier lets you start, and paid plans are available if you need more.	Freemium — a free tier lets you start, and paid plans are available if you need more.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Paid — this directory does not list a free tier for it.
Focus areas	e signature, documents, pdf, open source	e signature, documents, open source, api	office, documents, open source	pdf, ai chat, summarization, documents
Official site	opensignlabs.com	docuseal.co	openoffice.org	copilot.us
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Productivity & Notes category

Notes, tasks, and project tools that keep you organized and focused. The Productivity & Notes category on Tools Hub currently lists 2092 tools. Alongside OpenSign, it includes Papra, SimpleDMS, JARR, Gramps Web.

FreemiumProductivity & Notese-signaturedocumentspdfopen-source

Alternatives to OpenSign

Tools in the same Productivity & Notes category that share focus areas with OpenSign — worth comparing before you commit:

Productivity & Notes

DocuSeal

Open source document signing for everyone

Freemiume-signaturedocumentsopen-sourceapi

Productivity & Notes

Apache OpenOffice

The original open-source office suite

Freeofficedocumentsopen-source

Productivity & Notes

Chat with PDF

Chat with PDF documents and get cited answers instantly

Paidpdfai-chatsummarizationdocuments

Productivity & Notes

Collabora Online Development Edition

LibreOffice-based online office suite you can integrate in your infrastructure

Freeoffice-suitedocumentslibreofficeopen-source

Productivity & Notes

Instafill.ai

AI form filler that completes PDF forms from your documents

Freemiumpdfform-fillerautomationdocuments

Productivity & Notes

LibreOffice

Free office suite compatible with Microsoft formats

Freeofficedocumentsopen-source

More in Productivity & Notes

Comparing tools in the Productivity & Notes category? These related listings are worth a look: Papra — The document archiving platform for effortless organization; SimpleDMS — Open-source document management for small businesses; JARR — Just Another RSS Reader: web-based feed aggregator and reader.