| Price from | Free | $18.99/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · Online fax services | 8.4 (#31) | 9.1 (#4) |
| Spec score · Online Fax Services | 7.9 (#52) | 9.2 (#1) |
| API | The Yeastar integration uses Yeastar PBX webhooks and the blueFAX REST API to process fax operations. | eFax offers an API for integrating fax transmission with applications and business workflows. |
| Compliance support | gdpr | hipaa |
| Free plan | No | No |
| Headquarters | Munich, Germany | Los Angeles, California, United States |
| Inbound faxing | Yes | Yes |
| International faxing | Yes | Yes |
| Mobile apps | No | eFax provides Android and iOS applications for sending and receiving faxes from smartphones and tablets. |
| Virtual fax number | Yes | Yes |
