A charity evaluator is an organization, normally non-profit, that focuses on assessing charities. They attempt to bring concepts such as skepticism and business best practices to the field of philanthropy.
The Scientific Charity Movement was a movement that arose in the early 1870s in the United States to stop poverty. It sought to move the role of supporting the impoverished away from government and religious organizations and into the hands of Charity Organization Societies. In the US, the COS kept centralized records and learned from each other. The COS were dominant in private charity until the 1930s.
These Societies claimed the altruistic goals of lifting the poor out of poverty through the means of education and employment, and did make some strides to help young children involved in immoral underaged labor practices. However when it came to the COS's treatment of the "defective class" as they were labeled (insane, feeble-minded, blind, crippled, maimed, deaf and dumb, epileptic, criminal types, prostitutes, drug addicts, and alcoholics), the Scientific Charity Movement's other goals based in the popular post civil war social scientific theories of eugenics and social Darwinism came to light. Many of these "defective classes" were moved from the streets and into insane asylums where they were often experimented on by scientists of the time.
A charity watchdog is a type of nonprofit organization that provides ratings of charitable groups based on how an individual charity's money is spent, how the charity governs itself, and how the charity protects its donors' privacy, among other criteria. Charity evaluation from these organizations has typically focused on measuring administrative and fundraising costs and salaries and grading charities on the basis of how large a proportion of their budgets is directly spent on impactful activities.