DuckDuckGo explains itself thusly:
DuckDuckGo is an Internet privacy company that empowers you to seamlessly take control of your personal information online, without any tradeoffs. With our roots as the search engine that doesn’t track you, we’ve expanded what we do to protect you no matter where the Internet takes you.
DuckDuckGo’s search engine is pretty great, but they also do some great work in the online privacy space. If you want to learn more check out DuckDuckGo’s About page.