OpenSign
Open-source PDF signing with unlimited free signatures
OpenSign report card
Good · out of 4.0 · graded Oct 17, 2026
Best for unlimited free e-signatures
OpenSign's free cloud plan lets you send unlimited documents with templates and signing order, which nothing else here matches, and you can host it yourself too. Paying adds reminders, an API and team sharing. But three people on Teams pay about $60 a month, and your own branding needs Enterprise.
Who OpenSign is for
- Great if you want unlimited e-signatures without paying a thing
- A treat if you'd rather run open-source software on your own servers
- Good for developers who want an API and webhooks for $9.99 a month billed yearly
Who OpenSign is not for
- Not for you if you want your own logo on documents, as branding needs Enterprise
- Skip it if you sign on your phone, as the mobile app is still coming
- Pricey if three of you want shared templates, at about $60 a month on Teams
Why OpenSign gets a 2.6
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for moneyTeams is $19.99 a user a month billed yearly ($39.99 monthly), so about $60 a month for three. That's the dearer end of this category, for shared templates and your own storage. The free cloud plan covers 20 documents a month if you can do without sharing; self-hosting doesn't count.
- AFree plan and trialThe free cloud plan has unlimited signatures and templates, 14 field types, signing order and completion certificates, with no cap a normal person would reach. Automatic reminders and the API are the paid bits.
- CFeaturesTemplates, signing order, expiry dates, decline, sealed completion certificates, plus API, webhooks, Zapier and embedded signing on paid plans. The gaps: custom branding needs Enterprise, there's no mobile app, and payment requests are still listed as coming soon.
- CEase of useNo store rating on record. The cloud version is a web app with templates to set up; hosting it yourself means following the self-host guide and running a server.
- BPlatforms and integrationsWeb only, with Zapier, Dropbox and Gmail, and an API, webhooks and embedded signing on paid plans. No phone app yet, so it's web with integrations.
What these grades rest on. Graded from this listing, whose facts were read from OpenSign's own pages on 17 October 2026. Its pricing page showed no plans when we checked, so the prices here are the listing's. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/opensign#review"><img src="https://toolgpa.com/badge/opensign.svg" alt="OpenSign: 2.6 GPA on ToolGPA" width="196" height="56"></a>Where OpenSign stands among e-signature and proposal tools
OpenSign's GPA of 2.6 is higher than 7 of the 13 other e-signature and proposal tools we grade, and level with 4.
It stands best on free plan and trial (A, above 13 of 13) and worst on features (C, above 0).
Its paid plans start at $9.99 a month, against a middle price of $11.50 for the category: 2 of the 13 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 2 tools score higher and cost less.
Each grade against the category
Every bar is all 14 e-signature and proposal tools we grade, cut by the letter each got. OpenSign’s own letter is outlined.
- CValue for moneyAbove 4 of 13, level with 5
- AFree plan and trialAbove 13 of 13
- CFeaturesAbove 0 of 13, level with 8
- CEase of useAbove 1 of 13, level with 7
- BPlatforms and integrationsAbove 0 of 13, level with 12
Price against what you get
Each dot is one of 14 e-signature and proposal tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep OpenSign, or make your own?
You could make this
What OpenSign does at its core is documents and templates, and that is the kind of thing an AI app builder makes well.
You would give up one thing, listed below, and little else. It costs $119.88 a year. An AI app builder starts at about $19 a month on our listings, and you only need it while you build. OpenSign is open source, so there is a third way: take its code and run it yourself.
What you could make
- Documents and templates: an app builder makes these well.
- It runs in a browser, which is where something home-made would run too.
What you could not
- It plugs into other products, Zapier, Dropbox and Gmail among them, and has an API.
What this rests on. OpenSign’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is OpenSign?
OpenSign is an open-source e-signature app for signing PDFs yourself and requesting signatures from others, with templates, signing order, document expiry and a completion certificate for each signed file. Both the free cloud plan and the free self-hosted version allow unlimited signatures. Paid plans add API access, webhooks, field validations, bulk sending and team features.
OpenSign has a free plan. Paid plans start at $9.99 per month, billed yearly ($29.99 billed monthly). See every plan
Good for
- Individuals and small businesses that want unlimited signatures at no cost
- Developers who want to host an open-source signing tool themselves
- Teams that need API sends and webhooks for a low yearly price
Worth knowing
- API sends, public links and bulk sending use premium credits: 240 a year on Professional yearly, 100 a month on the monthly plan.
- SSO, custom branding, a custom domain and an uptime SLA come only with Enterprise, priced on request.
- Support for free users is through GitHub issues and Discord; official support comes with the cloud plans.
- Payment requests and a mobile app are listed as coming soon on the Teams plan.
Key features
- Unlimited free signatures
- Both the free cloud plan and the self-hosted version allow unlimited signatures, requests to others and templates.
- Open source and self-hostable
- The code is on GitHub under the AGPL-3 license and can be installed on your own servers by following the self-host guide.
- Completion certificates
- Signed files are sealed with a certificate, so any later change breaks the signature, and come with a log of access and timestamps.
- Templates and signing order
- Reusable templates, 14 field types, signing order, document expiry and an option for signers to decline.
- API, webhooks and Zapier
- Paid plans add API access, webhooks, a Zapier integration, embedded signing and your own Gmail or SMTP account for emails.
- Premium credits
- Paid plans include credits used for API sends, public signing links, bulk sends and kiosk-mode signing in person.
OpenSign pricing
- Starts at
- $9.99 per month, billed yearly ($29.99 billed monthly)
- Free plan
- OpenSign Free (cloud): unlimited signatures and templates, signing order, completion certificates, Dropbox import and email notifications.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| OpenSign Free | $0 | Hosted: unlimited digital signatures and templates, 14 field types, signing order, completion certificates and public profiles. |
| OpenSign Professional | $9.99per month, billed yearly ($29.99 billed monthly) | Field validations, webhooks, Zapier, API access, auto reminders, embedded signing and 240 premium credits a year. |
| OpenSign Teams | $19.99per user / month, billed yearly ($39.99 billed monthly) | Adds teams and organizations, shared templates, your own cloud storage and 500 premium credits a year. |
| OpenSign Enterprise | Custom | Price on request: custom domain, custom branding, an uptime SLA, SSO and priority support. |
| OpenSign Self-Hosted | $0 | The open-source version you host yourself from GitHub, with unlimited signatures and templates. |
| Teams (self-hosted) | $720per year for up to 3 users, self-hosted | Paid self-hosted license with 1,500 premium credits, API access, embedded signing, public links, kiosk mode and analytics. |
Read from opensignlabs.com on Oct 17, 2026. Prices change, so confirm with OpenSign before you buy.
Ways to pay less
- Annual discountLower price with yearly billing
Professional is $9.99 a month billed yearly against $29.99 monthly, and Teams $19.99 per user a month yearly against $39.99 monthly.
Stated on opensignlabs.com
Works with
OpenSign alternatives
- OpenSign vs Documenso
Free plan · from $25/mo
- OpenSign vs Docusign
Free trial · from $11/mo
- OpenSign vs SignWell
Free plan · from $10/mo
- OpenSign vs BoldSign
Free plan · from $5/mo
- OpenSign vs Zoho Sign
Free plan · from $10/mo
Common questions
Is OpenSign free?
OpenSign has a free plan. OpenSign Free (cloud): unlimited signatures and templates, signing order, completion certificates, Dropbox import and email notifications. Paid plans start at $9.99 per month, billed yearly ($29.99 billed monthly).
How much does OpenSign cost?
OpenSign lists 6 plans. OpenSign Free: $0. OpenSign Professional: $9.99 per month, billed yearly ($29.99 billed monthly). OpenSign Teams: $19.99 per user / month, billed yearly ($39.99 billed monthly). OpenSign Enterprise: custom pricing. OpenSign Self-Hosted: $0. Teams (self-hosted): $720 per year for up to 3 users, self-hosted. Prices were read from opensignlabs.com on Oct 17, 2026.
What platforms does OpenSign work on?
OpenSign is available on Web.
Does OpenSign offer any discounts?
OpenSign publicly lists the following: Lower price with yearly billing.
Does OpenSign have an Android app?
No Android app was listed when its pages were read on Oct 17, 2026. OpenSign is listed for Web.
Does OpenSign have an iPhone app?
No iPhone app was listed when its pages were read on Oct 17, 2026. OpenSign is listed for Web.
Is OpenSign open source?
Yes. OpenSign is open source, according to its own site. It can also be run on a server of your own.
Does OpenSign have an API?
Yes. OpenSign offers a public API, according to its own site.
What does OpenSign integrate with?
OpenSign's listing names Zapier, Dropbox and Gmail. A listing names up to eight integrations, so it may connect to more.
Who makes OpenSign?
OpenSign is made by OpenSignLabs.
What are the alternatives to OpenSign?
The closest alternatives to OpenSign in our directory are Documenso, Docusign, SignWell, BoldSign and Zoho Sign. Each one has a side-by-side comparison with OpenSign.
How does OpenSign compare with other e-signature and proposal tools?
OpenSign's GPA of 2.6 is higher than 7 of the 13 other e-signature and proposal tools we grade, and level with 4. It stands best on free plan and trial (A, above 13 of 13) and worst on features (C, above 0).
Is OpenSign good value for money?
ToolGPA grades OpenSign C for value for money. Its paid plans start at $9.99 a month, against a middle price of $11.50 for the category: 2 of the 13 others that charge start lower. On features, ease of use and platforms it scores 2.3 out of 4. 2 tools score higher and cost less.
Could I make my own version of OpenSign?
What OpenSign does at its core is documents and templates, and that is the kind of thing an AI app builder makes well. You would give up one thing, listed below, and little else. It costs $119.88 a year. An AI app builder starts at about $19 a month on our listings, and you only need it while you build. OpenSign is open source, so there is a third way: take its code and run it yourself. What you could not make: It plugs into other products, Zapier, Dropbox and Gmail among them, and has an API. This is a judgement from its listing. We have not built one.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 17, 2026.