Formstack Sign vs sproof sign
| Formstack Sign | sproof sign | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | Yes |
| Paid from | $250/mo | — |
| Open source | No | No |
| Platforms | api | api, Web |
| Free plan | No | Yes |
| Audit trail | Yes | Yes |
| Bulk sending | Yes | Yes |
| API access | Yes | Yes |
Both are listed in Best E-Signature Software, Best Electronic Signature Software. On Samsung Mobile US Press, sproof sign scores higher on our published basis.