Stalwart Mail Server
7.1#4 in mail server softwareFrom $1.09 a yearFree planWebAPILinuxmacOS
VisitStalwart Mail Server vs Zimbra Collaboration
Zimbra Collaboration
6.4#14 in mail server softwareAndroidiOSWebLinux
VisitWhat both publish
| Fact | Stalwart Mail Server | Zimbra Collaboration |
|---|---|---|
| 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. |
Stalwart Mail Server plans
- Community EditionFree
- Enterprise — 50,000 to 99,999 mailboxes$1.09 a year
- Enterprise — 10,000 to 49,999 mailboxes$1.25 a year
- Enterprise — 5,000 to 10,000 mailboxes$1.48 a year
- Enterprise — 1,000 to 4,999 mailboxes$1.74 a year
- Enterprise — 500 to 999 mailboxes$2.04 a year
Zimbra Collaboration plans
- ProfessionalPriced on request
- StandardPriced on request
Pick Stalwart Mail Server if…
You want what its maker publishes above — check its page for the details.
Pick Zimbra Collaboration if…
You want what its maker publishes above — check its page for the details.