Posteo vs Tuta Comparison

Feature	Posteo Visit →	Tuta Visit →
Overview
Rating	6.1	7.9
Pricing	$1.00/moStandard (individual, monthly) Show billing detailsHide billing details Standard (individual, monthly): EUR 1/month, prepaid credit, no annual commitment	$3.00/moRevolutionary (individual, annual) $8.00/moLegend (individual, annual) Show billing detailsHide billing details Revolutionary (individual, annual): Billed yearly, taxes included; €4.32/month if billed monthly Legend (individual, annual): Billed yearly, taxes included; €9.60/month if billed monthly
Free tier	Paid only	Limited free tier Show detailsHide details 1 GB storage, 1 calendar, 3 labels, no custom domain, no extra addresses
Established	2009	2011
Platforms	Not specified	WindowsmacOSLinuxAndroidiOS
Privacy
Jurisdiction	Germany Show detailsHide details Posteo e.K. (a registered sole proprietorship), Methfesselstr. 38, 10965 Berlin. Registered at the Handelsregister Berlin-Charlottenburg, HRA 47592 B. Founded and owned by Patrik and Sabrina Löhr, self-financed with no external investors or debt.	Germany Show detailsHide details Tutao GmbH, Deisterstr. 17a, 30449 Hanover, Germany. Registered at the District Court of Hanover, HRB 208014.
Independent security audit	Cure53 2017 Show audit detailsHide audit details Posteo web application, including Calendar and Notes (a separate, earlier Cure53 test in April 2015 covered Crypto Mail Storage specifically)	None on record
Source code	Partly open source	Fully open source
Zero-access encryption	Yes	Yes
Intra-provider E2EE	No	Yes
External PGP	Native	Not supported
Past data breach	No	No
Telemetry	No telemetry	No telemetry
Features
Hosting	Cloud	Cloud
Custom domain support	No	Yes
Aliases	Limited	Limited
Anti-spam approach	Described by Posteo only as a 'highly efficient spam and virus filter' — no further technical methodology is publicly documented.	SPF, DKIM, DMARC and MTA-STS harden the infrastructure against phishing and spam at the protocol level; Tuta blocks external content (images, videos) in emails by default and warns when the technical sender differs from the visible From address, without scanning encrypted message content.
Bundled services	CalendarAddress BookNotes	CalendarDrive