SHSelfHostIndex

Exim vs Kopano Groupware Core

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?
EX Exim Flexible and widely deployed mail transfer agent VS KO Kopano Groupware Core Open-source collaboration platform with Outlook support
FeatureEximKopano Groupware Core
CategoryMail ServersGroupware
LicenseGPL-2.0AGPL-3.0
LanguageCC++
Setup difficultyHardHard
Min. RAM64 MB2,048 MB
Deploymentbare-metal, sourcedocker, bare-metal
GitHub stars★ 786★ 60
First released19952016
ReplacesMicrosoft ExchangeMicrosoft Exchange

Why pick each one

Choose Exim if…

  • Extremely flexible
  • Proven at scale
Exim details

Choose Kopano Groupware Core if…

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in C++
Kopano Groupware Core details

Frequently asked questions

Is Exim or Kopano Groupware Core better?

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

Are Exim and Kopano Groupware Core free and open-source?

Yes. Exim is licensed under GPL-2.0 and Kopano Groupware Core under AGPL-3.0. Both can be self-hosted at no software cost.

Can I run Exim and Kopano Groupware Core with Docker?

Exim: check the project docs for container support. Kopano Groupware Core: yes.

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