DigiSigner vs OpenSign
DigiSigner
digisigner.com
OpenSign
opensignlabs.comSide by side
| Figure | DigiSigner | OpenSign |
|---|---|---|
| Price from | $15/mo | $9.99/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 9 | 5 |
| Spec score · E-Signature Software | 8.8 (#6) | 9.0 (#4) |
| Spec score · Electronic Signature Software | 8.8 (#4) | 9.0 (#3) |
| Spec score · E-signature tools | 8.3 (#27) | 8.9 (#10) |
| API | The API is a REST-style interface using JSON, and the documentation describes HTTP Basic Auth over HTTPS. | OpenSign exposes a REST API authenticated with an x-api-token header and provides sandbox, production and EU endpoints. |
| API access | Yes | Yes |
| Audit trail | Yes | Yes |
| Bulk sending | Yes | Yes |
| Document templates | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | DigiSigner says it does not offer a direct Zapier integration, but describes using Gmail as an intermediary; that workflow works only with one signer. | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. |
| Product | DigiSigner lets users sign and send documents online for signing. | OpenSign describes itself as an open-source PDF e-signature solution for signing, storing, and securing documents. |
| Security | DigiSigner says documents are stored behind a firewall, requests are authenticated against the user session, and communications use SSL encryption. | The API documentation lists TLS-encrypted transport, audit trails, IP logging, and tamper-evident signed PDFs. |
| Signature order | both | both |
Plans
DigiSigner
- PRO$15 a month
- TEAM$50 a month
- API - 100 documents$99 a month
- API - 300 documents$249 a month
- API - 1,000 documents$499 a month
- API creditsPrice not published
- FreeFree
- API$0.50, paid once
- ENTERPRISEPriced on request
OpenSign
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- FreeFree
- EnterprisePriced on request
In their own words
DigiSigner
DigiSigner is a web-based service for signing documents and requesting signatures from others. Users upload a document, create a signature by drawing with a mouse, typing a name, or inserting a signature image, then invite other signers and receive a completion notification. The service lists an audit trail, templates, bulk sending, and signature-order options. PRO and TEAM include templates, branding, and signing links; PRO allows one sender, while TEAM allows up to five senders and adds team features. DigiSigner also offers API access through a REST-style interface using JSON, with PHP, Java, and C# client libraries. Production API use requires a PRO or TEAM subscription and API credits. The company says its signatures comply with ESIGN, UETA, and European eIDAS and are legally binding. It serves real estate, human resources, legal, and small business users. The free plan is free and includes three documents per month; PRO is $15 a month billed annually, and TEAM is $50 a month billed annually. A 14-day trial is available.
OpenSign
OpenSign is an open-source PDF e-signature solution for signing, storing, and securing documents. Users can create reusable templates with pre-placed widgets and send them through the API to one or many signers. API workflows include self-signing, drafts, signer roles, public template links, and real-time webhook notifications. Templates can be embedded in React, Next.js, HTML, JavaScript, and Angular projects. The documentation lists TLS-encrypted transport, audit trails, IP logging, and tamper-evident signed PDFs; account protection includes two-factor authentication and passkey sign-in. The free plan costs nothing and lists unlimited digital signatures and templates, completion certificates, sequential signing, OpenSign Drive, and email notifications. Its free-plan guide limits invitation emails to 15 per month; bulk sending and public links require a paid plan. Live API tokens require Professional or Teams, though sandbox tokens are available on all plans. OpenSign provides Docker self-hosting instructions for Linux, macOS, and Windows. Some SMTP features are limited to paid plans.