Alternatives to Maddy

Composable single-binary open-source mail server written in Go. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Maddy.

  • Stalwart

    Rust-based all-in-one mail server supporting JMAP, IMAP, and SMTP.

    FreeOpen sourceLinuxSelf-hosted

    Stalwart is a Rust all-in-one mail server that adds JMAP alongside IMAP and SMTP, also newer with a smaller ecosystem.

  • Mailcow

    Dockerized open-source mail server suite with web admin and webmail.

    FreeOpen sourceLinuxSelf-hosted

    Mailcow runs a Docker-based suite with a web admin panel and SOGo webmail included, but needs Docker and more resources than a single daemon.

  • Mail-in-a-Box

    Turnkey open-source script that builds a full mail server on Ubuntu.

    FreeOpen sourceLinuxSelf-hosted

    Mail-in-a-Box automates a whole mail server stack with a turnkey script, but is tied specifically to Ubuntu.

  • iRedMail

    Free open-source mail server installer for Linux and BSD.

    FreeOpen sourceLinuxSelf-hosted

    iRedMail is a long-established installer that sets up a full mail stack on many Linux and BSD systems, through a text-based installer.

  • Modoboa

    Open-source mail hosting platform with an admin UI and webmail.

    FreeOpen sourceLinuxSelf-hosted

    Modoboa adds a simplified admin web UI and webmail for mail hosting, with a smaller community than larger self-hosted projects.

  • Poste.io

    All-in-one Docker mail server with web admin and built-in TLS.

    FreemiumProprietaryLinuxSelf-hosted

    Poste.io bundles web admin, webmail and TLS in a single Docker container, but is not open source and larger deployments need paid licensing.

Similar software

Related functionality, not a direct replacement.