emSigner API vs Upsign
| emSigner API | Upsign | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | Yes |
| Paid from | — | $12/mo |
| Open source | No | No |
| Platforms | Android, api, iOS, self-hosted, Web | Android, iOS, Web |
| Free plan | No | Yes |
| Embedded signing | Yes | Yes |
| Identity verification | Yes | — |
| Workflow status API | Yes | Yes |
| Webhook event types | 4 | 13 |
| Signed-file retrieval | Yes | — |
| Sandbox environment | Yes | — |
| SDK languages | — | 0 |
Both are listed in Best Digital Signature API Software. On The Geeks Club, Upsign scores higher on our published basis.