GiveWell is a nonprofit dedicated to finding outstanding giving opportunities and publishing the full details of its analysis to help donors decide where to give.
GiveWell doesn’t focus solely on financials, such as assessing administrative or fundraising costs. Instead, it conducts in-depth research to determine how much good a given program accomplishes (in terms of lives saved, lives improved, etc.) per dollar spent. Rather than rating as many charities as possible, GiveWell focuses on the few charities that stand out most (by its criteria) in order to find and confidently recommend high-impact giving opportunities.