Well, we released our beta search for Tor yesterday: search4tor7txuze.onion/ (works obviously only in the Tor browser). That’s as good as it gets regarding making it technically impossible, isn’t it? More complex obviously for a browser - but the answer can simply not be „only no data at all is good“, because that’s a destructive approach that only favors the worst privacy intruders; no one would then be able to build up competition. We work hard to be as transparent as possible about what we do. Show me any other company that builds a big data product (like search) that is so transparent about „yes we collect data, but it’s non personal - here is how we do it, please scrutinize us“. Are we perfect? Hell no! But we try and we go a long way to be challenged to improve. If we were shady - would we be naked in front of you, showing each step we take? We would not even interact with the tech folks (especially not on hacker news, where people really know what they talk about), but scam people who know less (at least that sounds like a more reasonable strategy to me if I would want to fool people - which we don’t).

(EDIT/Disclaimer: I obviously work for Cliqz)