Ecosia is described as 'Search engine donating over 80% of profits to global reforestation, supporting millions of trees planted, funded by ad revenue, with mobile and web access' and is a very popular web search engine in the online services category. There are more than 100 alternatives to Ecosia for a variety of platforms, including Web-based, Android, iPhone, Google Chrome and iPad apps. The best Ecosia alternative is DuckDuckGo, which is free. Other great apps like Ecosia are Startpage, SearXNG, Brave Search and Google Search.
They do donate money to charity if you set it up to.