I'm working on https://ubikom.cc, end-to-end encrypted email service based on the concept of self-sovereign identity. Basically, you keep the encryption key, and all your messages are encrypted, on the wire or at rest. The core platform is open-source, the code is available here: https://github.com/regnull/ubikom

Billions of users use GMail (or similar services). These companies are making money by selling ads, and their "free" email service is just another way to improve ad targeting. Furthermore, your account can be disabled at any time and for any reason. Sure, you can switch to Protonmail, Tutanota, etc. because they are "good" companies. But why do you have to trust to any of them? Keep your encryption key, and have communication providers move around encrypted bytes on your behalf. Store your identity on a blockchain (maybe), so that no one can take it away.

That's the idea. If you'd like to work on something like this, get in touch. lgx (at) ubikom.cc