Organization

Open Philanthropy

Major philanthropic foundation funding high-impact causes including AI safety, biosecurity, and global development through evidence-based grantmaking.

Open Philanthropy
Type
ngo
Founded
2014
HQ
San Francisco, California, United States

Open Philanthropy is a philanthropic organization founded in 2014 that focuses on identifying and funding high-impact causes. The organization emerged from GiveWell's research team and operates with a commitment to evidence-based grantmaking, transparency, and cause prioritization. Its major focus areas include artificial intelligence safety and policy, biosecurity and pandemic preparedness, global development, animal welfare, and institutional reform. Open Philanthropy has become one of the largest funders of AI safety research and has distributed billions of dollars to organizations and researchers working on existential and global catastrophic risks. The organization is known for its detailed cause reports, public reasoning about funding decisions, and collaborative approach with other major funders in the effective altruism ecosystem.

Last updated 31 August 2026