Docker Mailserver vs Keila

A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
FeatureDocker MailserverKeila
CategoryMail ServersMail Servers
LicenseMITAGPL-3.0
LanguageShellElixir
Setup difficultyMediumEasy
Min. RAM2,048 MB512 MB
Deploymentdockerdocker, source
GitHub stars★ 18,682★ 2,181
First released20152021
ReplacesGoogle Workspace, Microsoft 365Mailchimp, Sendinblue

Why pick each one

Choose Docker Mailserver if…

  • Reproducible, version-controllable config
  • Lightweight
Docker Mailserver details

Choose Keila if…

  • Released under the AGPL-3.0 license
  • Easy to set up — beginner-friendly
  • First-class Docker support for quick deployment
  • Active community (2.2k GitHub stars)
Keila details

Frequently asked questions

Is Docker Mailserver or Keila better?

Neither is universally better. Docker Mailserver has the larger community, while Keila is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.

Are Docker Mailserver and Keila free and open-source?

Yes. Docker Mailserver is licensed under MIT and Keila under AGPL-3.0. Both can be self-hosted at no software cost.

Can I run Docker Mailserver and Keila with Docker?

Docker Mailserver: yes. Keila: yes.

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