Cyrus IMAP vs Dovecot
Cyrus IMAP
cyrusimap.orgDovecot
dovecot.orgSide by side
| Figure | Cyrus IMAP | Dovecot |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Email Server Software | 8.0 (#8) | 7.8 (#14) |
| Spec score · Mail Server Software | 7.9 (#16) | 7.8 (#20) |
| Intended users | The project says Cyrus is used in production at universities and private enterprises. | Dovecot Pro is described as built for carrier and enterprise-scale email infrastructure, including telcos and hosting providers. |
| Protocols | Cyrus supports JMAP, IMAP, POP3, CalDAV, and CardDAV. | The download page lists IMAP, POP3, and LMTP protocol packages. |
| Security | The feature documentation lists Kerberos, LDAP, and SQL authentication, access control, and a sealed system design. | Dovecot describes a multi-process architecture that isolates tasks to limit the impact of a vulnerability in one component. |
Plans
In their own words
Cyrus IMAP
Cyrus IMAP has no write-up on Specifiction yet; its figures are above.