| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 15 |
| Spec score · Mailing List Management Software | 8.3 (#4) | 8.5 (#2) |
| Purpose | Citadel is an email, collaboration, groupware, and content-management system. | phpList sends email newsletters, marketing campaigns, announcements and notifications to audiences ranging from hundreds to millions. |
| Support | Support is provided through an active user and developer community, an online knowledge base, a support forum, and a mailing list. | Community support is available through documentation, forums and IRC, while paid support is available from phpList developers and consultants. |
