Ecosia
When the company was created, it used Yahoo!, Microsoft Bing, and Wikimedia's technology. Yahoo! served as advertisements. Ecosia now uses Bing as its search provider. Soon in 2018, Ecosia said it would be a privacy-friendly search engine. In the Privacy Policy it statest that it would not permanently store data or use tracking services. When a search is made to a partnered website, a Euro is donated to tree replant services.