Software Alternatives, Accelerators & Startups

Stalwart Labs

Modernize your mail server.

Best Stalwart Labs Alternatives & Competitors in 2025

The best Stalwart Labs alternatives based on verified products, community votes, reviews and other factors.
Latest update:

  1. E-mail Hosting for Your Domains

    /mxroute-alternatives
  2. Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

    /postfix-alternatives
  3. Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.

    Try for free paid Free Trial $12.0 / Monthly (Per inbox, per month.)

    Try for free
  4. Cheap, no-nonsense email.

    paid $10.0 / Annually

    /purelymail-alternatives
  5. Mailu is a simple yet full-featured mail server as a set of Docker images.

    /mailu-alternatives
  6. Platform to host multiple email domains.

    /migadu-alternatives
  7. mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.

    /mailbox-org-alternatives
  8. Email, calendars, and contacts to highest standards of security, privacy and reliability.

    paid Free Trial $3.0 / Monthly (per user)

    /fastmail-alternatives
  9. Apache James is a pure Java SMTP, POP3 enterprise mail server.

    Open Source

    /apache-james-alternatives
  10. A pure Unix shell script implementing ACME client protocol and deploying SSL certificates.

    /acme-sh-alternatives
  11. Secure email with absolutely no compromises. Get your free encrypted email account today.

    freemium €5.0 / Monthly (user - 5 GB)

    /protonmail-alternatives
  12. immich Self-hosted photo and video backup solution directly from your mobile phone

    Open Source

    /immich-alternatives
  13. With Nextcloud enterprises host their own secure cloud solution for storage, collaboration & communication from any device, anywhere.

    Open Source

    /nextcloud-alternatives
  14. Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

    Open Source

    /mail-in-a-box-alternatives
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