OpenSMTPD alternatives

Nearest on its board

1. 26
   SM

   Stalwart Mail ServerStalwart Labs
   5.0 APIOpenFree Free tier · from $2.40/yr
   →
2. 28
   R

   RabiMailrabimail.com
   4.8 APIOpenFree From ₹199/mo
   →
3. 25
   SM

   Synology MailPlus Serversynology.com
   5.1 APIOpenFree Free tier
   →
4. 29
   CP

   CommuniGate Procommunigatepro.ru
   4.3 APIOpenFree —
   →
5. 24
   K

   KumoMTAkumomta.com
   5.1 APIOpenFree Free tier · from $5,000/yr
   →
6. 30
   EM

   EVO Mail Serverevomailserver.com
   4.3 APIOpenFree $259 one-time
   →
7. 23
   W

   Whitemailwhitemail.io
   5.1 APIOpenFree Free tier
   →
8. 31
   GE

   GreenArrow Engine On-Premisesgreenarrowemail.com
   4.3 APIOpenFree From $600/mo
   →
9. 22
   G

   grommuniogrommunio.com
   5.6 APIOpenFree Free tier · from €1.99/mo
   →
10. 32
    MS

    Mailbux Self-Hostedmailbux.com
    4.3 APIOpenFree $1,499 one-time
    →
11. 21
    ME

    Microsoft Exchange Onlinemicrosoft.com

    Exchange Online is hosted email for business, with email, calendar, and contacts accessible across major browsers and devices.

    5.6 APIOpenFree —
    →
12. 33
    ME

    MDaemon Email Servermdaemon.com
    4.1 APIOpenFree —
    →
13. 20
    D

    Dovecotdovecot.org

    Dovecot Community Edition is an open-source email server.

    5.8 APIOpenFree Free tier
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14. 19
    AJ

    Apache Jamesjames.apache.org

    Apache James is a modular mail server running on the JVM.

    5.9 APIOpenFree Free tier
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15. 18
    MM

    Maddy Mail Servermaddy.email

    Maddy implements the functionality to send and receive email over SMTP and store messages with IMAP access.

    5.9 APIOpenFree Free tier
    →
16. 17
    CI

    Cyrus IMAPcyrusimap.org

    Cyrus IMAP is an email, contacts, and calendar server.

    5.9 APIOpenFree Free tier
    →
17. 16
    ZC

    Zimbra Collaborationzimbra.com

    Zimbra is an enterprise email and collaboration suite with email, calendar, contacts, tasks, and file sharing.

    6.0 APIOpenFree Free tier
    →
18. 15
    PI

    poste.ioposte.io

    Poste.io is a self-hosted email server with web administration, webmail, spam protection, and mail server components in one Docker container.

    6.0 APIOpenFree Free tier · from $349/yr
    →
19. 14
    H

    hMailServerhmailserver.com

    hMailServer is a self-hosted mail server that supports SMTP, IMAP and POP3.

    6.0 APIOpenFree Free tier
    →
20. 13
    PM

    Pegasus Mailpmail.com

    Pegasus Mail is a free, standards-based email client for one or multiple users on a computer or local area network.

    6.0 APIOpenFree Free tier
    →