I've been working on a side project, turned full-time project for a while, called Mailyard. Mailyard is a privacy-first email backup solution, that gives users to comforts of putting their emails on the cloud, with full control over their data via encryption/decryption within the browser.
Mailyard is part of a larger movement, in which I believe software should be designed to help people exercise greater control over their lives, instead of giving up those controls to other interests.