Inkless vs Upsign
| Inkless | Upsign | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | £30/mo | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | No | Yes |
| Embedded signing | Yes | Yes |
| Identity verification | Yes | — |
| Workflow status API | Yes | Yes |
| Webhook event types | 17 | 13 |
| Signed-file retrieval | Yes | — |
| Sandbox environment | Yes | — |
| SDK languages | — | 0 |
Both are listed in Best Digital Signature API Software. On Specifiction, Inkless scores higher on our published basis.