Cyrus IMAP vs Zimbra Collaboration
Cyrus IMAP
cyrusimap.org
Zimbra Collaboration
zimbra.comSide by side
| Figure | Cyrus IMAP | Zimbra Collaboration |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Email Server Software | 8.0 (#8) | 7.3 (#20) |
| Spec score · Mail Server Software | 7.9 (#16) | 7.3 (#29) |
| Integrations | The installation guide describes receiving mail from SMTP servers such as Sendmail, Postfix, and Exim through LMTP. | Zimbra's third-party apps page names Slack, Zoom, Dropbox, Webex, Jitsi, and Microsoft Teams. |
| Security | The feature documentation lists Kerberos, LDAP, and SQL authentication, access control, and a sealed system design. | Listed security capabilities include two-factor authentication, S/MIME email signing and encryption, SAML single sign-on, and mobile device allow/block/quarantine controls. |
| Support | The project points users to active mailing lists for help. | Standard support is business-hours only; Premier adds 24×7 support for Severity-1 issues. |
Plans
Zimbra Collaboration
- ProfessionalPriced on request
- StandardPriced on request
In their own words
Cyrus IMAP
Cyrus IMAP has no write-up on Specifiction yet; its figures are above.
Zimbra Collaboration
Zimbra Collaboration has no write-up on Specifiction yet; its figures are above.