What is "givewell"

GiveWell is an American non-profit charity evaluator and effective altruism-focused organization. Unlike any other charity evaluators, GiveWell focuses primarily on the cost-effectiveness of the organizations that it evaluates, rather than traditional metrics such as the percentage of the organization's budget that is spent on overhead. GiveWell recommends several charities per year. In 2015, its top recommendations were the Against Malaria Foundation, GiveDirectly, the Schistosomiasis Control Initiative, and the Deworm the World Initiative. GiveWell moved over $100 million to its top charities in 2015.