# Open-source email providers

3 open-source email providers rated against public privacy criteria.

1. [Kolab Now](https://privacyratings.com/email-providers/kolab-now/): C (63/100). Paid email and groupware service from Apheleia IT in Switzerland, built on the open-source Kolab platform, with calendars, contacts, files and video calls.
2. [Disroot](https://privacyratings.com/email-providers/disroot/): D (59/100). Volunteer-run platform from the Netherlands offering email and other open services.
3. [Thundermail](https://privacyratings.com/email-providers/thundermail/): D (40/100). Paid email, calendar and contacts service from MZLA Technologies, the Mozilla subsidiary that makes Thunderbird. Built on the Stalwart mail server, with data hosted in Germany. In beta and open only by invitation from a waitlist.

Source: https://privacyratings.com/open-source/email-providers/