Mailu
6.2#12 in email server softwareFree planFree planWebAPILinuxSelf-hosted
VisitMailu vs Stalwart Mail Server
Stalwart Mail Server
7.2#4 in mail server softwareFrom $1.09 a yearFree planWebAPILinuxmacOS
VisitWhat both publish
| Fact | Mailu | Stalwart Mail Server |
|---|---|---|
| Deployment | Mailu runs as Docker containers and documents Docker Compose and Kubernetes deployment options. | 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. |
| Integrations | The documentation describes Nextcloud authentication through IMAP and calendar and address-book access through Radicale using WebDAV/CardDAV/CalDAV clients. | 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. |
| Product | Mailu is a free software mail server distributed as a set of Docker images. | Stalwart is an open-source mail and collaboration server for email, calendars, contacts, and shared files. |
| Security | Listed security features include enforced TLS, DANE, MTA-STS, Let's Encrypt, outgoing DKIM, antivirus scanning, and blocking malicious attachments. | 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. |
Mailu plans
- MailuFree
Stalwart Mail Server plans
- 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
Pick Mailu if…
You want what its maker publishes above — check its page for the details.
Pick Stalwart Mail Server if…
You want what its maker publishes above — check its page for the details.