GiveWell is a nonprofit charity evaluator based in San Francisco. They conduct and publish research into the most cost-effective giving opportunities in global health and development.[1]


GiveWell was started by Holden Karnofsky and Elie Hassenfeld in 2007.[2] GiveWell also helped incubate Open Philanthropy, which was spun off as a separate entity in 2017.[2]

Top charities

GiveWell publishes a list of "top charities" based on cost-effectiveness and quality of evidence.[3] The list is updated annually. As of November 2021, the top GiveWell charities were, in order:...

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