OpenSign vs Upsign
| OpenSign | Upsign | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api | Web |
| Free plan | Yes | Yes |
| SDK languages | — | 0 |
| Embedded signing | — | Yes |
| Workflow status API | — | Yes |
| Webhook event types | — | 13 |
Both are listed in Best Digital Signature API Software. On Inferse, OpenSign scores higher on our published basis.