DuckDuckGo (DDG) is an Internet search engine that emphasizes protecting searchers' privacy and avoiding filter bubble of personalized search results. DuckDuckGo distinguishes itself from other search engines by not profiling its users and by deliberately showing all users the same search results for a given search term. DuckDuckGo also emphasizes getting information from the best sources rather than the most sources, generating its search results from key crowdsourced sites such as Wikipedia and from partnerships with other search engines like Yandex, Yahoo!, Bing, Wolfram Alpha, and Yummly.The company is based in Paoli, Pennsylvania, United States, in Greater Philadelphia, and has 20 employees. The company name originates from the children's game duck, duck, goose.Some of DuckDuckGo's code is free software hosted at GitHub under the Apache 2.0 License, but the core is proprietary. On 21 May 2014, DuckDuckGo launched a redesigned version that focused on smarter answers and a more refined look. The new version added often requested features such as images, local search, auto-suggest and more.On 18 September 2014, Apple included DuckDuckGo in its Safari browser as an optional search engine. On 10 November 2014, Mozilla added DuckDuckGo as a search option to Firefox 33.1.