| Price from | $0.03/mo | $3.29/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 6 | 3 |
| Spec score · Online fax services | 8.9 (#9) | 8.1 (#44) |
| Spec score · Online Fax Services | 8.6 (#24) | 7.7 (#65) |
| Spec score · eFax Software | 8.6 (#7) | 8.0 (#14) |
| Free plan | No | Yes |
| Inbound faxing | Yes | No |
| International faxing | Yes | The service also sends paid faxes to many other countries; for most countries the FAQ lists $3.63 for up to 15 pages. |
| Security | FaxSalad says faxes are encrypted in transit and at rest on secure servers and are available in the portal for up to three months. | The FAQ says user information is encrypted over HTTPS and outbound server communications use SSL or TLS. |
| Support | FaxSalad says its support team responds to contact form inquiries and support cases within 24 hours. | FaxZero directs users to email support and says its support policy covers only the FaxZero website, not other sites or computer applications. |
| Virtual fax number | Yes | No |
