182 Howard Street
San Francisco, CA 94105
This nonprofit is dedicated to finding outstanding giving opportunities and publishing the full details of their analysis to help donors decide where to give for concerns in the developing world. Unlike charity evaluators that focus solely on financials, assessing administrative or fundraising costs, GiveWell conducts in-depth research aiming to determine how much good a given program accomplishes (in terms of lives saved, lives improved, etc.) per dollar spent. Rather than try to rate as many charities as possible, GiveWell focuses on the few charities that stand out the most (by their criteria) in order to find and confidently recommend high-impact giving opportunities. See their list of top charities on their website.