OpenSign

Open-source e-signature app with a hosted free plan and a self-hosting option.

Open sourceSelf-hostablePDF editors and e-signature tools

Verified facts: 3 of 3
Alternatives ranked: 4
Approved reviews: 0
Visits sent from here: 0

About OpenSign

OpenSign is an open-source document signing project that pitches itself as a free alternative to Docusign. It covers uploading PDFs, placing signature and form fields, sending to multiple signers in sequence, reusable templates, reminders, an audit trail and a completion certificate. There is also built-in storage for signed files and an API for automating sending. The hosted cloud version has a free plan with unlimited signatures, and paid plans add team features, branding and API access; the code can also be self-hosted for full control of your data, with documentation for deploying it. The project is smaller and less established than Documenso or DocuSeal, its interface is functional rather than refined, and you should check which features sit in paid tiers before committing. For individuals and small organisations who mainly want to collect signatures without paying per envelope, it is worth a look.

Best for: Individuals and small organisations who want free unlimited signing.

What works

Hosted free plan with unlimited signatures
Open source and self-hostable
Built-in storage for signed documents

Why people leave

Smaller project with less polish
Team and API features sit in paid plans
Fewer integrations than commercial services

Top OpenSign alternatives

See all 4

1
Documenso
A more established open-source signing platform with an active community.
66.5
2
DocuSeal
Open source with a polished form builder and embeddable components.
62.6
3
SignWell
A hosted service with a free plan and responsive support.
59.6
4
Docusign
The full-featured market leader, if you outgrow a small project.
57.2

Why people left OpenSign

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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OpenSign: common questions

Is OpenSign free?

Yes. OpenSign is free, open-source software that you can host yourself.

Is OpenSign open source?

Yes. The source code is on GitHub at OpenSignLabs/OpenSign. You can also run it on your own server.

What platforms does OpenSign run on?

OpenSign is available for Web and Self-hosted.

What are the best alternatives to OpenSign?

The highest-ranked OpenSign alternatives right now are Documenso, DocuSeal and SignWell. See the full ranked list for pricing, platforms and verified facts.

See all 4 OpenSign alternatives

OpenSign facts

3 of 3 verified

Free plan: Unlimited e-signatures; Checked Oct 25, 2026opensignlabs.com(opens source in a new tab); “Discover our new FREE plan with unlimited e-signatures!”
Self-hosting: Yes; Checked Oct 25, 2026docs.opensignlabs.com(opens source in a new tab); “We also provide self host option for those who want full control of their data.”
Docs: Tutorials, API docs, self-host help; Checked Oct 25, 2026docs.opensignlabs.com(opens source in a new tab); “tutorials, API documentation, self-host help & much more.”