E-mail · Calendar & contacts
mailcow
Complete mail suite in containers, from Germany.
open source self-hostable The Infrastructure Company GmbH (mailcow) · DEMail, webmail, calendar and contacts with a friendly admin panel; the classic choice for a self-hosted mail domain.
Website ↗ Source ↗ Plan “E-mail” with itPlan “Calendar & contacts” with it
How you can run it
| Way | Where the data lives | Price basis | Verdict |
|---|---|---|---|
| Host it myself | your own server or hardware | free | green — You run it yourself: no data leaves your own infrastructure. |
Facts
| Company / project | The Infrastructure Company GmbH (mailcow) (DE) |
|---|---|
| Licence | GPL-3.0 |
| Self-hosting footprint | 4096 MB RAM · 2 vCPU · 20 GB — small deployment: a household or a team of up to ~20 people |
| Commonly replaces | Google Workspace, Microsoft 365 |
| Upstream (awesome-selfhosted-data) | 13,363 stars · updated 2026-08-18 · Docker, PHP |
| Provenance | curated, verified 2026-09-04 |
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