E-Signature · Vendor site 2026-10-04
OpenSign is an open source PDF e-signature platform positioned as an alternative to commercial signing tools. It offers unlimited free signatures, multi-party signing, completion certificates with access logs, secure document storage in OpenSign Drive, self-hosting, and developer API documentation from OpenSign Labs.
Understand the total cost
Free
Free
Homepage promotes a free plan with unlimited e-signatures, free invites, free completion certificates, and free secure document storage.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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Yes. OpenSign has an ongoing free plan. Homepage promotes a free plan with unlimited e-signatures, free invites, free completion certificates, and free secure document storage.
OpenSign is listed as free. No paid plan with a published price was found.
API or developer access is mentioned. Official OpenSign docs site advertises API documentation, self-host guides, and cloud resources for integrators.