"GiveWell is an American non-profit charity evaluator and effective altruism-focused organization.[5][6] 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.[6][7] GiveWell recommends several charities per year. In 2014, its top recommendations were the Against Malaria Foundation, GiveDirectly, the Schistosomiasis Control Initiative, and the Deworm the World Initiative."
https://en.wikipedia.org/wiki/GiveWell
"GiveWell is an American non-profit charity evaluator and effective altruism-focused organization.[5][6] 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.[6][7] GiveWell recommends several charities per year. In 2014, its top recommendations were the Against Malaria Foundation, GiveDirectly, the Schistosomiasis Control Initiative, and the Deworm the World Initiative."