OpenSign Review, Pricing & Features

OpenSign review covering the open-source e-signature platform's features, free and paid pricing plans, and alternatives to DocuSign and HelloSign.

Researched and fact-checked by Bartu Cavusoglu · Updated July 19, 2026

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Category
Documents & E-signature
Pricing
Freemium, from Free
Verified
Not yet
Last updated
July 19, 2026
Founded
2023
Headquarters
New York City, New York, USA
Free PlanWeb AppAPIFreemium

Overview

OpenSign is an open-source digital signature platform founded in 2023 and based in New York City, built to give individuals, businesses, and developers a transparent, cost-effective alternative to commercial e-signature tools like DocuSign.

It is available both as a free, self-hosted open-source deployment for organizations that want full control over their infrastructure and data, and as a managed cloud service with tiered subscription plans for teams that prefer a hosted solution.

Key Features

OpenSign supports multi-signer sequential and parallel signing workflows, OTP-based identity verification, comprehensive audit trails, and reusable templates for recurring document types.

Paid plans add API access, webhooks, Zapier integration, bulk document sending, team and organization management, custom branding, and single sign-on for larger organizations.

Pricing

The self-hosted open-source version is free with unlimited signatures, while the hosted cloud service offers a Free plan, a Professional plan at 9.99 US dollars per month, a Teams plan at 19.99 US dollars per user per month, and a custom-priced Enterprise plan.

Higher tiers unlock larger API signature allotments, webhooks, Zapier automation, bulk sending, white-labeling, and SSO, letting organizations scale from individual use to enterprise deployment.

Key Features

Pros & Cons

Pros

  • Free, unlimited self-hosted option with full source code access
  • Significantly cheaper paid plans than most commercial e-signature tools
  • Open-source transparency around security and data handling
  • API and webhook access included from the Professional tier
  • Zapier integration simplifies workflow automation

Cons

  • Younger, less established brand than DocuSign or Adobe Sign
  • Self-hosting requires technical setup and ongoing maintenance
  • Smaller integration ecosystem than large incumbent e-signature vendors
  • Enterprise features like SSO require the custom-priced Enterprise plan
  • As an early-stage, unfunded startup, long-term roadmap pace may vary

Pricing

Frequently Asked Questions

Is OpenSign free to use?

Yes, the self-hosted open-source version is free with unlimited signatures, and the hosted cloud service also offers a free plan with basic features.

How much does OpenSign's paid plan cost?

The Professional plan is 9.99 US dollars per month, and the Teams plan is 19.99 US dollars per user per month; Enterprise pricing is custom.

Can I self-host OpenSign?

Yes, OpenSign's source code is publicly available and can be deployed on your own infrastructure at no licensing cost.

Is OpenSign a legitimate alternative to DocuSign?

Yes, OpenSign is explicitly built and marketed as an open-source alternative to DocuSign, offering similar core e-signature workflows at a lower cost.

What document formats does OpenSign support?

OpenSign supports PDF, DOCX, JPG, and PNG documents for signing.

Does OpenSign offer an API?

Yes, API access with a monthly signature allotment is included starting on the Professional plan.

Where is OpenSign based?

OpenSign Labs was founded in 2023 and is headquartered in New York City, USA.

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