Kopano Groupware Core vs Kolab Groupware
A side-by-side comparison of two self-hosted groupware options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Kopano Groupware Core | Kolab Groupware |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Category | Groupware | Groupware |
| License | AGPL-3.0 | AGPL-3.0 |
| Language | C++ | PHP |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 2,048 MB |
| Deployment | docker, bare-metal | bare-metal, docker |
| GitHub stars | ★ 60 | ★ 200 |
| First released | 2016 | 2002 |
| Replaces | Microsoft Exchange | Microsoft Exchange, Zimbra |
What are Kopano Groupware Core and Kolab Groupware?
Kopano Groupware Core
Kopano Groupware Core is an open-source collaboration suite providing email, calendaring, and contacts with MAPI compatibility. It serves as the foundation of a self-hosted Exchange alternative.
- MAPI-based architecture
- Shared calendars and folders
- ActiveSync via Z-Push
- Web-based email client
Kolab Groupware
Kolab is an open-source groupware solution providing email, shared calendars, contacts, tasks, and notes. It integrates standard components like Postfix, Cyrus IMAP, and Roundcube into a coherent collaboration platform.
- Email and calendaring
- Shared address books
- ActiveSync support
- Standards based
Kopano Groupware Core vs Kolab Groupware: key differences
Kopano Groupware Core is written in C++, while Kolab Groupware is built with PHP. Kolab Groupware is the more established project (first released 2002), while Kopano Groupware Core arrived in 2016. Kolab Groupware has the considerably larger community, at 200 GitHub stars versus 60.
Why pick each one
Choose Kopano Groupware Core if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Written in C++
Watch out for
- Complex multi-component setup
- Slower recent development
Choose Kolab Groupware if…
- Built on proven components
- Strong standards support
Watch out for
- Complex to install
- Steep operational curve
Frequently asked questions
Is Kopano Groupware Core or Kolab Groupware better?
Neither is universally better. Kolab Groupware has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Kopano Groupware Core and Kolab Groupware free and open-source?
Yes. Kopano Groupware Core is licensed under AGPL-3.0 and Kolab Groupware under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Kopano Groupware Core and Kolab Groupware with Docker?
Kopano Groupware Core: yes. Kolab Groupware: yes.