--- title: OpenSign canonical: https://saasranked.com/software/opensign/ category: E-Signature Software points: 63 rank: 7 of 9 facts_checked: 2026-10-08 --- # OpenSign Open-source e-signature service with a free plan that has unlimited signatures and templates. 63 points out of 100. #7 of 9 e-signature services. Vendor: OpenSign Labs. Website: https://www.opensignlabs.com/ - The free plan lists unlimited e-signatures, unlimited templates, signing in order and completion certificates [1]. - Professional costs $9.99 a month on yearly billing ($29.99 on monthly billing) [1]. - Professional adds API access, webhooks, Zapier and bulk send, with 240 premium credits a year [1]. - The code is open source under AGPL-3 and can be self-hosted [3]. - Single sign-on is listed only on the Enterprise plan, and a mobile app and payments are marked coming soon [1]. Verdict: OpenSign suits people who want to send unlimited documents for free, or run the software themselves [1][3]. Professional at $9.99 a month adds the API, bulk send and Zapier [1]. The catch: the pricing page names no security certification and no EU signature level, and its mobile app and payments are not yet released [1][2]. Best for: People who want free unlimited signing and the option to self-host. ## Points | Criterion | Line | Value | Points | Note | |---|---|---|---|---| | Signing | Reusable templates | Yes | 6/6 | Free plan lists unlimited templates; Professional includes everything in the free plan [1]. | | Signing | Bulk send | Yes | 4/4 | Professional lists bulk send, up to 240 documents a year on yearly billing [1]. | | Signing | Signing order | Yes | 3/3 | The free plan lists send in order [1]. | | Signing | Collect payment while signing | No | 0/3 | Payment requests are marked coming soon on the Teams plan [1]. | | Signing | Audit trail on every document | Yes | 4/4 | Completion certificates are listed on the free plan, which Professional includes; they carry access logs [1][2]. | | Legal strength | Highest eIDAS signature level | Not published | 0/12 | Not published on the vendor's FAQ or pricing pages [2][1]; the FAQ says only that signatures comply with laws in many jurisdictions. | | Legal strength | Signer ID check | Not published | 0/5 | Not published on the vendor's pricing or FAQ pages; the pricing page lists only email-based verification [1][2]. | | Legal strength | US ESIGN and UETA named | Not published | 0/3 | Not published on the vendor's FAQ page, which names no specific law [2]. | | Security | SOC 2 Type II or ISO 27001 | Not published | 0/8 | Not published on the vendor's FAQ or pricing pages [2][1]. | | Security | Single sign-on (SSO) | Yes | 5/5 | SSO support is listed among the Enterprise features [1]. | | Security | Two-factor sign-in | Yes | 3/3 | The help centre documents two-factor sign-in with an authenticator app under Settings, Preferences, Security [5]. | | Security | Open source | Yes | 3/3 | The GitHub repository says OpenSign is licensed under AGPL-3 [3]. | | Connections | Public API | Yes | 7/7 | API documentation is public, and API access is listed on Professional at $9.99 a month [4][1]. | | Connections | Storage and automation links | Dropbox, Zapier | 2/4 | Free plan lists import from Dropbox; Professional lists Zapier. Google Drive and OneDrive are not named [1]. | | Connections | Mobile apps | None | 0/4 | The pricing page marks a mobile app as coming soon [1]. | | Price and limits | Free plan | Yes | 8/8 | Free for life: request signatures from others with unlimited e-signatures [1]. | | Price and limits | Documents a month on the cheapest paid plan | 100 | 8/8 | The free plan, included in Professional, lists unlimited signatures; premium credits (240 a year) cover only API, public-link, kiosk and bulk sends [1]. | | Price and limits | Cheapest paid plan | $9.99/mo | 10/10 | Professional, $9.99 a month on yearly billing [1]. | ## Plans | Plan | Price | Per month (USD) | |---|---|---| | Free | Free [1] | $0 | | Professional | $9.99/month [1] | $9.99 | | Teams | $19.99/user/month [1] | $19.99 | The yearly view of the pricing page is labelled 66% off; the $29.99 and $39.99 figures are the monthly view [1]. ## Strengths - Free plan lists unlimited signatures, templates and guest signers, and lets you request signatures from others [1]. - Source code is public on GitHub under AGPL-3 [3]. - Two-factor sign-in with an authenticator app is documented in the help centre [5]. - Each finished document gets a completion certificate with access logs [2][1]. - API documentation covers documents, templates, contacts and webhooks [4]. ## Limits - Premium actions such as API sends and bulk send use credits: 240 a year on Professional [1]. - The pricing page marks the mobile app and payment requests as coming soon [1]. - Single sign-on is listed only for Enterprise, which is priced on request [1]. - No SOC 2, ISO 27001 or eIDAS level is named on its pricing or FAQ pages [1][2]. ## Vendor claims (not scored) - OpenSign says its signatures are legally binding in most countries [2]. ## Sources 1. [OpenSign pricing](https://www.opensignlabs.com/plans-pricing), OpenSign, accessed 2026-10-08 2. [OpenSign FAQs](https://www.opensignlabs.com/faqs), OpenSign, accessed 2026-10-08 3. [OpenSignLabs/OpenSign](https://github.com/OpenSignLabs/OpenSign), GitHub, accessed 2026-10-08 4. [OpenSign API v1.1 documentation](https://docs.opensignlabs.com/docs/API-docs/v1.1), OpenSign docs, accessed 2026-10-08 5. [Security (two-factor authentication and passkeys)](https://docs.opensignlabs.com/docs/help/Settings/SecurityManagement), OpenSign docs, accessed 2026-10-08