Hi. I'm one of the engineers that was working on Cliqz browsers. My focus was on the iOS one recently. All browser code was always open, you can find it on Github.

iOS - https://github.com/cliqz/user-agent-ios

Android - https://github.com/cliqz-oss/browser-android

Android (NextGen, was planned for release next month) - https://github.com/cliqz/daisy

Destkop - https://github.com/cliqz-oss/browser-f

There is much more on our Github organizations: https://github.com/cliqz-oss/ https://github.com/cliqz/

We loved OSS at Cliqz, it was a part of the company culture and ultimate proof how private our products were.