Stalwart Mail Server vs Zimbra Collaboration
Stalwart Mail Server
stalwart.email
Zimbra Collaboration
zimbra.comSide by side
| Figure | Stalwart Mail Server | Zimbra Collaboration |
|---|---|---|
| Price from | $0.09/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 16 | 2 |
| Spec score · Email Server Software | 8.0 (#12) | 7.3 (#20) |
| Spec score · Mail Server Software | 8.0 (#15) | 7.3 (#29) |
| Deployment | Stalwart can run as one node or as a cluster across regions, and its site describes it as designed to scale to millions of mailboxes. | Zimbra can be deployed on-premises, in a private cloud, or in regional data centers. |
| Integrations | Listed integrations include LDAP, Active Directory, OIDC, SQL directories, RocksDB, FoundationDB, PostgreSQL, MySQL, SQLite, S3-compatible storage, Azure Blob, and search engines including Meilisearch, Elasticsearch, and OpenSearch. | Zimbra's third-party apps page names Slack, Zoom, Dropbox, Webex, Jitsi, and Microsoft Teams. |
| Product | Stalwart is an open-source mail and collaboration server for email, calendars, contacts, and shared files. | Zimbra is an enterprise email and collaboration suite with email, calendar, contacts, tasks, and file sharing. |
| Security | The product page lists mailbox encryption at rest with S/MIME or OpenPGP, DANE, MTA-STS, automatic ACME TLS, DKIM key rotation, access controls, rate limiting, and automatic IP banning. | Listed security capabilities include two-factor authentication, S/MIME email signing and encryption, SAML single sign-on, and mobile device allow/block/quarantine controls. |
Plans
Stalwart Mail Server
- CommunityFree
- Enterprise: 25–499 mailboxes$2.40 a year
- Enterprise: 500–999 mailboxes$2.04 a year
- Enterprise: 1,000–4,999 mailboxes$1.74 a year
- Enterprise: 5,000–10,000 mailboxes$1.48 a year
- Enterprise: 10,000–49,999 mailboxes$1.25 a year
- Enterprise: 50,000–99,999 mailboxes$1.09 a year
- Enterprise: 100,000+ mailboxesPriced on request
- Community EditionFree
- Enterprise — 50,000 to 99,999 mailboxes$1.09 a year
Zimbra Collaboration
- ProfessionalPriced on request
- StandardPriced on request
In their own words
Stalwart Mail Server
Stalwart Mail Server 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.