SHSelfHostIndex

Stalwart Mail Server 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.

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ST Stalwart Mail Server Modern all-in-one mail server in a single binary VS KO Kopano Groupware Core Open-source collaboration platform with Outlook support
FeatureStalwart Mail ServerKopano Groupware Core
CategoryMail ServersGroupware
LicenseAGPL-3.0AGPL-3.0
LanguageRustC++
Setup difficultyMediumHard
Min. RAM512 MB2,048 MB
Deploymentdocker, binary, bare-metaldocker, bare-metal
GitHub stars★ 14,059★ 60
First released20202016
ReplacesMicrosoft Exchange, Google WorkspaceMicrosoft Exchange

Why pick each one

Choose Stalwart Mail Server if…

  • Single modern binary
  • Strong security defaults
Stalwart Mail Server 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 Stalwart Mail Server or Kopano Groupware Core better?

Stalwart Mail Server is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Kopano Groupware Core if its specific feature set fits your needs better.

Are Stalwart Mail Server and Kopano Groupware Core free and open-source?

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

Can I run Stalwart Mail Server and Kopano Groupware Core with Docker?

Stalwart Mail Server: yes. Kopano Groupware Core: yes.

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