Tutanota is a German firm that provides a browser-based, end-to-end encrypted email system, which means that Tutanota cannot access your data. Great unless you forget your password, in which case you've had it.
There is a free version for basic communications and all versions support a Q&A symmetric encryption security system. Emails to other Tutanota users are encrypted by default.
Tutanota has a clean, simple interface and the encryption is easy to handle. What you can't do, though, is send a GPG/PGP encrypted email to someone without a Tutanota account, for example a StartMail user.
Some of the system settings are hidden away in rather unintuitive places, but most of the usual filters are there if you look hard enough.
In testing the web app worked reliably but the biggest bugbear was the lack of a search function, which we consider a serious barrier to those thinking of moving from Yahoo. There is no facility to import contacts either.
However, at less than half of the cost of a cup of Starbucks per month the price is right and for a simple web-based email service with encryption Tutanota fits the bill.
Clean simple and fast, easy privacy particularly with other Tutanota users. Nice price and flexible upgrade plan.
Not so keen
No search function, no ability to import contacts or messages, no HTML email composition options.
Access by IMAP/POP: No
End-to-end encryption: Yes
Free version: Yes
Mobile app: Android and iOS
Open source: Yes
Cost: Basic version is free, limited to 1GB storage and no aliases. 5GB and five aliases cost €12 per year. Additional storage and aliases cost incrementally more.
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