| Price from | $60/mo | $3.29/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 5 | 3 |
| Spec score · Online Fax Services | 9.1 (#2) | 7.7 (#65) |
| Spec score · Online fax services | 9.0 (#7) | 8.1 (#44) |
| Spec score · eFax Software | 8.9 (#3) | 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 | FaxCore describes HTTPS, two-factor authentication, end-to-end encryption, and in-network routing as security measures for protecting faxes. | The FAQ says user information is encrypted over HTTPS and outbound server communications use SSL or TLS. |
| Support | Support is available by phone, email, remote access, and a support ticket form; phone support hours are Monday through Friday, 9 AM to 8 PM Eastern Time. | FaxZero directs users to email support and says its support policy covers only the FaxZero website, not other sites or computer applications. |
| What it does | FaxCore is an enterprise fax server offered on premises, in a hybrid etherFAX configuration, or as a cloud service. | FaxZero lets users send faxes to fax machines in the United States, including Puerto Rico, and Canada without owning a fax machine. |
