Mailcow — Email (Open Source)

Mailcow is an open-source Email solution. Compare it against 12 other Email tools on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is Mailcow?

Mailcow is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under Email. Buyers typically evaluate Mailcow when they need a dependable Email option and want to weigh the trade-offs between free, open-source and paid tools before committing.

Mailcow alternatives

If Mailcow isn't the right fit, compare these Email alternatives side by side:

AnonAddy (addy.io)Maddy Mail ServerMail-in-a-BoxMailuModoboaMoxPostalSimpleLoginStalwart Mail Serverdocker-mailserveriRedMailwildduck

Frequently asked questions

Is Mailcow free?
Yes. Mailcow is open source and free to use, with no purchase cost for the core product.
What are the best Mailcow alternatives?
Popular Email alternatives to Mailcow include AnonAddy (addy.io), Maddy Mail Server, Mail-in-a-Box, Mailu. See the full list of Email on FreeSoftwareX.
What type of software is Mailcow?
Mailcow is an open-source Email tool.

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