Assently API
6.7#9 in electronic signature apisFrom €32 a monthAndroidiOSWebAPI
VisitAssently API vs OpenSign
What both publish
| Fact | Assently API | OpenSign |
|---|---|---|
| Free plan | No | Yes |
| Integrations | The maker says CoreID can integrate with any platform and system, and Point of Sale can be adapted to customer systems. | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. |
Assently API plans
- API€255 a month
- Assently E-Sign€32 a month
- Assently LiveID€99 a month
OpenSign plans
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- EnterprisePriced on request
Pick Assently API if…
You want what its maker publishes above — check its page for the details.
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.