💡 Pick it for a mature, all-in-one Docker mail platform with integrated webmail and groupware.
mailcow is a modern mail server suite based on Dovecot, Postfix, SOGo, and other open-source software. It provides a complete email solution...
Best Stalwart Labs Alternatives ranked by AI · updated Aug 2026
Stalwart Mail Server is an open-source mail server for organizations and self-hosters that need integrated SMTP, IMAP, JMAP, CalDAV, and CardDAV services. It stands out for its Rust implementation, modern JMAP support, and built-in administration and storage features.
Top 6 Stalwart Labs alternatives
💡 Pick it if you prefer a conventional Postfix/Dovecot stack with broad OS support and a long deployment history.
iRedMail is a full-featured mail server solution that supports email services like SMTP, IMAP, POP3, and webmail.
Free and Paid versions available
💡 Pick it when you want the simplest guided path to hosting personal email on one Ubuntu server.
Mail-in-a-Box provides a full stack mail server solution with webmail and contacts. It enables easy mail hosting and management.
💡 Pick it for a modular Django-based administration layer over a traditional Postfix and Dovecot stack.
Modoboa is a mail hosting and management platform including a modern and simplified web interface for user and domain administration.
Free and open-source
💡 Pick it for enterprise-grade collaboration features, vendor support, and a mature web groupware experience.
Zimbra is an enterprise-class email, calendar, and collaboration solution built for the cloud, both public and private.
Starting at $6 per mailbox per year
6
Maddy
Maddy Mail Server Project
💡 Pick it if you want a compact, single-binary mail server and do not need Stalwart's broader groupware protocols.
Maddy is an open-source all-in-one mail server written in Go for self-hosters and small organizations. It combines SMTP submission and delivery with...
Pros
- Provides more of a complete mail stack than Haraka
- Includes IMAP, authentication, and DKIM in one project
- Simpler deployment than assembling separate SMTP components
Cons
- Less mature ecosystem than Postfix-based deployments
- Less programmable than Haraka's plugin architecture
- Smaller community and fewer hosting integrations
Free, open source
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