The search engine from Cliqz is improved by using user data. It uses a search algorithm thatÂ weighs data about peopleâ€™s behavior on the web instead of aÂ technical analysis of websites. The company guarantees collected data is anonymized and offers the option to opt-out.
Personally, I don't find that very comforting. Google has claimed to do similar things with the data it collects. They have an opt-out, which of course gets wiped whenever you wipe your cookies (something everyone who values his/her privacy should do), you have to opt-out again. When you forget to opt-out, Google will systematically collect as much data as they can. On top of which, you are technically only opting-out of personalized ads, not the surveillance behind those ads. Also, Google claims to do all kinds of magic to "protect" the data they collect from you. IDK if they've ever claimed to anonymize the data, but if they did, it would be a false claim.
I'll be sticking with StartPage.com, a search engine that claims not to collect anything about anyone, not even their IP address. That, in a nutshell, is the best way to make sure third parties play nice with what they collect from you: not letting them collect anything in the first place. (FYI, StartPage.com obtains it's results from Google, so if you want Google's results without Google's spying, StartPage.com is a good way to go.)