Tuta is open source so security experts can verify the code that protects your emails. Our Android app is Google-free making Tuta the best open source email service.
With its all-round end-to-end encryption and its clear focus on open source, Tuta is the best email provider when it comes to convenience, security and privacy. We have replaced the need for IMAP by building the Tuta desktop clients for Windows, Linux and Mac OS that also support offline mode. Our next development steps include conversation view and email import. Our vision with Tuta is to become a full-fledged email alternative with a calendar, notes, cloud storage - everything encrypted by default.