Mailcow key facts
Last updated- Legal entity
- The Infrastructure Company GmbH
- Headquarters
- Germany (DE)
- Ownership
- Independent
- Data hosting
- Self-hosted
- Deployment
- Self-hosted
- Open source
- Yes
- US Cloud Act exposure
- Low (no US parent)
- Replaces
- Gmail, Microsoft Exchange Online, Zimbra
About Mailcow
mailcow is an open-source mail server suite developed in Germany, designed to be deployed using Docker Compose. It provides a complete groupware distribution that allows users to manage their own email infrastructure with persistent data storage through Docker volumes. The solution includes a comprehensive administrative web interface for managing domains, mailboxes, and server settings. While the company's own website uses US-based infrastructure for documentation, the mailcow product is designed for sovereign, self-hosted deployment on user-controlled infrastructure.
Alternative to
Target Segments
Deployment Options
Key Features
Related Articles
All articlesEuro-Office 1.0: Europe's New Open-Source Answer to Microsoft 365
Released on 9 June 2026, Euro-Office is an AGPL-licensed office suite forked from ONLYOFFICE and backed by Nextcloud, IONOS, and Proton. It gives businesses and public bodies a fully sovereign alternative for document collaboration.
11 Jun 2026Digital SovereigntyAfter the US Election: Why 2026 Is the Year EU Companies Must Diversify Cloud Risk
Legal exposure, tariffs, and operational lock-in used to be separate concerns. In 2026 they stack together. Here is a sober playbook for European companies that want to reduce US cloud dependency without breaking what works.
7 May 2026Country GuidesFrance's Sovereign Software Landscape: 12 Alternatives You Should Know
France is arguably Europe's most ambitious country when it comes to digital sovereignty. From AI labs to cloud infrastructure, here are the French-built tools reshaping the tech landscape.
20 Mar 2026