Kopano Groupware Core vs SOGo
A side-by-side comparison of two self-hosted groupware options — licensing, setup difficulty, resource needs, and what each one replaces.
SOGo
Scalable groupware server with webmail, calendar and contacts
| Feature | Kopano Groupware Core | SOGo |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 1 · At risk | 86 · Excellent |
| Category | Groupware | Groupware |
| License | AGPL-3.0 | GPL-2.0 |
| Language | C++ | Objective-C |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 1,024 MB |
| Deployment | docker, bare-metal | docker, bare-metal |
| GitHub stars | ★ 60 | ★ 2,165 |
| First released | 2016 | 2009 |
| Replaces | Microsoft Exchange | Microsoft Exchange, Microsoft 365 |
What are Kopano Groupware Core and SOGo?
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
SOGo
SOGo is a fully featured, scalable groupware server offering shared calendars, address books, and webmail. It is fully compatible with Microsoft Outlook via ActiveSync and with CalDAV/CardDAV clients.
- CalDAV and CardDAV support
- Microsoft ActiveSync compatibility
- Shared calendars and contacts
- Integrated AJAX webmail
Kopano Groupware Core vs SOGo: key differences
Kopano Groupware Core is written in C++, while SOGo is built with Objective-C. Licensing differs — AGPL-3.0 for Kopano Groupware Core versus GPL-2.0 for SOGo. SOGo is the lighter option, starting around 1,024 MB of RAM against 2,048 MB for Kopano Groupware Core. SOGo is the more established project (first released 2009), while Kopano Groupware Core arrived in 2016. SOGo has the considerably larger community, at 2,165 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 SOGo if…
- Strong Outlook compatibility
- Scales to many users
Watch out for
- Complex initial setup
- Requires separate mail server
Frequently asked questions
Is Kopano Groupware Core or SOGo better?
Neither is universally better. SOGo has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Kopano Groupware Core and SOGo free and open-source?
Yes. Kopano Groupware Core is licensed under AGPL-3.0 and SOGo under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Kopano Groupware Core and SOGo with Docker?
Kopano Groupware Core: yes. SOGo: yes.
Which is lighter on resources, Kopano Groupware Core or SOGo?
SOGo has the smaller minimum footprint at 1,024 MB of RAM, compared to about 2,048 MB for Kopano Groupware Core. Real-world usage depends on library size, user count, and enabled features.