GiveWell

GiveWell is not a direct service provider but a research organization that identifies the most effective charities in the world. They conduct deep-dive investigations into the impact, cost-effectiveness, and transparency of various nonprofits. Their recommendations are the gold standard for donors who want to ensure their money is doing the most good possible. By publishing their full research and reasoning, GiveWell provides a level of transparency that is rare in the nonprofit sector, helping to shift billions of dollars toward high-impact interventions.