SHSelfHostIndex

Courier Mail Server vs Horde Groupware

A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
CO Courier Mail Server Integrated mail server with IMAP, POP, and webmail VS HO Horde Groupware PHP groupware suite with webmail and calendaring
FeatureCourier Mail ServerHorde Groupware
CategoryMail ServersGroupware
LicenseGPL-3.0GPL-2.0
LanguageCPHP
Setup difficultyHardHard
Min. RAM512 MB512 MB
Deploymentbare-metal, sourcebare-metal, source
GitHub stars★ 13★ 243
First released20002003
ReplacesMicrosoft ExchangeMicrosoft Exchange

Why pick each one

Choose Courier Mail Server if…

  • Released under the GPL-3.0 license
  • Written in C
  • Lightweight — runs in 512 MB RAM
Courier Mail Server details

Choose Horde Groupware if…

  • Released under the GPL-2.0 license
  • Written in PHP
  • Lightweight — runs in 512 MB RAM
Horde Groupware details

Frequently asked questions

Is Courier Mail Server or Horde Groupware better?

Neither is universally better. Horde Groupware has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.

Are Courier Mail Server and Horde Groupware free and open-source?

Yes. Courier Mail Server is licensed under GPL-3.0 and Horde Groupware under GPL-2.0. Both can be self-hosted at no software cost.

Can I run Courier Mail Server and Horde Groupware with Docker?

Courier Mail Server: check the project docs for container support. Horde Groupware: check the project docs for container support.

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