Tuta Mail

About

Tuta Mail is an email app for macOS from Tuta, which also offers encrypted calendar and contacts. Tuta encrypts all your data end-to-end with post-quantum cryptography, and the site says it is ad-free, with no tracking or personalized ads.

The app is designed to be simple and easy to use, with an intuitive design meant to support an organized workflow. You can use a custom domain for a professional email address. The built-in calendar works with email invites, so you can manage meetings and appointments from your email.

Tuta was founded in 2011 with a focus on privacy and says it runs on renewable energy. You can create a free account to get started.