SHSelfHostIndex

Stalwart Mail Server vs Lieer

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?
ST Stalwart Mail Server Modern all-in-one mail server in a single binary VS LI Lieer Sync Gmail with a local notmuch mail database
FeatureStalwart Mail ServerLieer
CategoryMail ServersMail Servers
LicenseAGPL-3.0GPL-3.0
LanguageRustPython
Setup difficultyMediumMedium
Min. RAM512 MB128 MB
Deploymentdocker, binary, bare-metalbinary, source
GitHub stars★ 14,059★ 649
First released20202017
ReplacesMicrosoft Exchange, Google WorkspaceGmail web interface

Why pick each one

Choose Stalwart Mail Server if…

  • Single modern binary
  • Strong security defaults
Stalwart Mail Server details

Choose Lieer if…

  • Released under the GPL-3.0 license
  • Written in Python
  • Tiny footprint — runs in 128 MB RAM
Lieer details

Frequently asked questions

Is Stalwart Mail Server or Lieer better?

Neither is universally better. Stalwart Mail Server has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.

Are Stalwart Mail Server and Lieer free and open-source?

Yes. Stalwart Mail Server is licensed under AGPL-3.0 and Lieer under GPL-3.0. Both can be self-hosted at no software cost.

Can I run Stalwart Mail Server and Lieer with Docker?

Stalwart Mail Server: yes. Lieer: check the project docs for container support.

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