OpenSign
8.4#1 in e-signature softwareFrom $9.99 a monthFree planWebAPILinuxmacOS
VisitOpenSign vs sproof sign
sproof sign
7.1#22 in e-signature softwareFree planFree planWebAPI
VisitWhat both publish
| Fact | OpenSign | sproof sign |
|---|---|---|
| API | OpenSign exposes a REST API authenticated with an x-api-token header and provides sandbox, production and EU endpoints. | The Enterprise plan includes API access for automating signature workflows. |
| API access | Yes | Yes |
| Audit trail | Yes | Completed workflows provide participants with the signed document and a tamper-proof audit trail. |
| Bulk sending | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. | Its integrations include Microsoft SharePoint, Word, Teams, Google Drive, Zapier, Make, DATEV, DocuWare, and Personio. |
OpenSign plans
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- EnterprisePriced on request
sproof sign plans
- Private Plan—
- Single€15 a month
- Team€170 a month
- PrivateFree
- EnterprisePriced 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 sproof sign if…
sproof sign offers a free PDF-signing option for private individuals, students, and associations, with paid plans presented for individuals, teams, and companies. Teams that need structured approvals or Enterprise API automation may find its workflow features relevant.