@volpit @Wetrix The one with the best privacy seems to be https://swisscows.com/

"We do not collect any of our visitors’ personal information. None whatsoever. When using Swisscows neither your IP address is recorded nor is the browser you are using (Internet Explorer, Safari, Firefox, Chrome, etc.) collected. No analyses are made, which operating system our users use (Windows, Mac, Linux, etc.); your search are not recorded either."

Read full here: https://swisscows.com/en/privacy

(was to long)