Posteo

Posteo is an independent email provider based in Berlin, founded in 2009. It offers secure and sustainable email accounts with an address book, calendar and notes, and is entirely free of advertisement, free of tracking and self-financed by the email accounts of more than half a million customers. Its team consists of more than 40 people. Posteo works using real green energy from Green Planet Energy and has an innovative encryption concept. In May 2014, Posteo became the first German telecommunications service to publish a transparency report.

Posteo was founded in 2009 and is an independent email provider based in Berlin. It offers secure and sustainable email accounts with an address book, calendar and notes, and is entirely free of advertisement, free of tracking and self-financed by the email accounts of more than half a million customers. Its team currently consists of more than 40 people. Posteo has been pronounced the test winner three times by Stiftung Warentest, and in 2024 and 2025 was awarded the German Fairness Award from ntv. In May 2014, Posteo became the first German telecommunications service to publish a transparency report. According to a c't magazine article, Posteo's breakthrough came in 2013 via the Snowden revelations, and it was celebrated by Der Spiegel, FAZ and The Guardian as a poster child for secure communication. In October 2015, heise.de reported that Posteo was one of the first German online service providers to test certificate pinning.

Green, secure, ad-free email with maximum privacy, no tracking and no user profiling.

• Email

  4 GB email account, upgradeable; two-factor authentication (TOTP); 1 Euro per month; registration without personal details, no tracking; compatible with all devices and apps (IMAP, POP3).

• Calendar

  3 calendars included, upgradeable; synchronise via CalDAV and share via ICS link; calendar encryption at the touch of a button.

• Address book

  Synchronisation via CardDAV (iOS, Android, ...); address book encryption at the touch of a button.

• Notes

  Notes feature included with Posteo accounts.

1. 1Email green, secure, simple and ad-free - posteo.de -posteo.de
2. 2Email green, secure, simple and ad-free - posteo.de - About Posteoposteo.de
3. 3Email green, secure, simple and ad-free - posteo.de - Press reviews and moreposteo.de