| Price from | $10/mo | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 7 | 3 |
| Spec score · E-Signature Software | 9.0 (#3) | 7.8 (#45) |
| Spec score · Digital Transaction Management Software | 9.0 (#3) | 7.8 (#26) |
| Spec score · E-signature tools | 9.1 (#7) | 7.8 (#41) |
| API access | Yes | The Nitro Sign API is available to Enterprise customers and can create, send, retrieve, and track signature requests, with webhook events for envelope progress. |
| Audit trail | Yes | Yes |
| Bulk sending | Yes | Yes |
| Company History | The footer states copyright since 2014 through 2026. | Nitro says it was founded in Melbourne more than two decades ago; the page does not state an exact founding year. |
| Document templates | Yes | Yes |
| Free plan | Yes | No |
| Application Integrations | Integrations include Google Drive, Dropbox, Salesforce, and thousands more through Zapier. | Nitro lists Microsoft 365, Salesforce, Google Drive, OneDrive, Dropbox, and Zapier among its integrations. |
| Legal Compliance | The platform states compliance with ESIGN, UETA, GDPR, and major international regulations. | Nitro Sign states compliance with eIDAS, UETA, and the U.S. ESIGN Act. |
| Signature order | both | both |
| SMS authentication | Yes | Yes |
