| Price from | $18.99/mo | — |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 10 |
| Spec score · Online Fax Services | 9.2 (#1) | 8.3 (#34) |
| Spec score · Online fax services | 9.1 (#4) | 8.3 (#40) |
| API | eFax offers an API for integrating fax transmission with applications and business workflows. | The Starter and Business subscriptions include REST API access, while the API documentation is marked as forthcoming. |
| Compliance support | hipaa | gdpr |
| Free plan | No | No |
| Headquarters | Los Angeles, California, United States | Hamburg, Germany |
| Inbound faxing | Yes | Yes |
| International faxing | Yes | Yes |
| Mobile apps | eFax provides Android and iOS applications for sending and receiving faxes from smartphones and tablets. | No |
| Virtual fax number | Yes | Yes |
