Tutanota

Tutanota is the world's most secure email service, easy to use and private by design. It's open-source, private and comes with a free built-in encrypted calendar. Sign up for free to take control of your mailbox.

Tutanota is a free secure email service that just launched an encrypted calendar. With Tutanota we are building the secure alternative to Google with a free mailbox, address book, calendar - all encrypted by default.