Head-to-head · Email
Microsoft 365 vs Mailcow
Which one to pick in 2026 — comparing 🇺🇸 Microsoft 365 with the European alternative 🇪🇺 Mailcow on the things that actually decide who can read your data.
Verdict
Who has stronger privacy guarantees by law?
Mailcow — GDPR-native and outside the US CLOUD Act / FISA 702 reach.
Which one encrypts your data end-to-end by default?
Neither ships full E2E by default — check the table for nuance.
Which one tracks you for ads?
Neither monetises through ad tracking.
Which one is open source?
Mailcow is open source. Microsoft 365 is proprietary.
Side-by-side
Microsoft 365 vs Mailcow — full comparison
Make the switch
Try Mailcow instead of Microsoft 365
Dockerized open-source mail server suite.
Other European alternatives to Microsoft 365
Microsoft 365 vs Collabora Online
Self-hostable online office suite based on LibreOffice.
Microsoft 365 vs Disroot
Volunteer-run platform of privacy-respecting online services.
Microsoft 365 vs Open-Xchange
European communication and collaboration platform for telcos and ISPs.
Microsoft 365 vs Infomaniak kSuite
A full Swiss productivity suite.