OpenSign
8.4#1 in e-signature softwareFrom $9.99 a monthFree planWebAPILinuxmacOS
VisitOpenSign vs Sertifi API
Sertifi API
6.2#23 in digital signature api softwareFree planFree planWebAPI
VisitWhat both publish
| Fact | OpenSign | Sertifi API |
|---|---|---|
| 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. |
OpenSign plans
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- EnterprisePriced on request
Sertifi API plans
- Free Travel Company AuthorizationsFree
- Build-your-own packagePriced on request
- EssentialsPriced on request
- PremiumPriced on request
- Travel Management CompaniesPriced on request
Pick OpenSign if…
OpenSign may suit individuals and businesses that need PDF signing, reusable templates, or API-based signing workflows. It also offers self-hosting instructions for those who want to run it on Linux, macOS, or Windows.
Pick Sertifi API if…
You want what its maker publishes above — check its page for the details.