OpenSign vs Sertifi API
OpenSign
opensignlabs.com
Sertifi API
corp.sertifi.comSide by side
| Figure | OpenSign | Sertifi API |
|---|---|---|
| Price from | $9.99/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 5 | 5 |
| Spec score · Digital Signature API Software | 9.0 (#2) | 7.5 (#22) |
| API access | Yes | A Sertifi REST API key can be obtained through a Customer Success Manager or by submitting a support ticket. |
| Audit trail | Yes | Sertifi says its transaction audit trail records document access and signing details, including date, IP address, email address, hash record, and signing method. |
| Integrations | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. | Named integrations include Amadeus Delphi.fdc, Infor HMS and Sales & Catering, Oracle OPERA Cloud Service, Salesforce, and several payment processors. |
| Security | The API documentation lists TLS-encrypted transport, audit trails, IP logging, and tamper-evident signed PDFs. | The security page states that connections use TLS 1.2 and identifies SOC 2 Type 2 and ISO 27001 compliant data facilities. |
| Support | The documentation directs users to contact OpenSign support at [email protected] for assistance. | The Developer Center directs users to its Support Center and says they can contact the support team through its Support widget. |
Plans
OpenSign
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- FreeFree
- EnterprisePriced on request
Sertifi API
- Free Travel Company AuthorizationsFree
- Build-your-own packagePriced on request
- EssentialsPriced on request
- PremiumPriced on request
- Travel Management CompaniesPriced on request
In their own words
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.
Sertifi API
Sertifi API provides REST, SOAP, and Travel Company Authorizations paths for integrating Sertifi signing and payment workflows. REST documentation covers creating folders and documents, inviting signers, and adding payment requests; a REST key is obtained through a Customer Success Manager or support ticket. Sertifi’s e-signature service targets hospitality businesses and supports contracts, BEOs, HR paperwork, and other documents. Signers can work from any device and location, while templates, reminders, and payment requests support the workflow. Named integrations include Amadeus Delphi.fdc, Infor HMS and Sales & Catering, Oracle OPERA Cloud Service, Salesforce, and payment processors. The offering lists seven SDK languages, embedded signing, a workflow status API, 17 webhook event types, signed-file retrieval, and a sandbox. Sertifi states that connections use TLS 1.2, with SOC 2 Type 2 and ISO 27001 compliant facilities, PCI Level 1 validation, HIPAA compliance, and annual audits. Signed documents remain in its portal for one year; emailed PDFs remain available indefinitely.