Quantitative ratings of policies of national governments are an important tool for the monitoring of compliance with international standards in many domains. In this article we present a global index of anti-human trafficking policies developed by a research consortium using the TIP country reports of the U.S. State Department (the 3P index) and an index based on the reports of the monitoring body of the Council of Europe Convention against Human Trafficking (GRETA). Although the global 3P index gives more favorable ratings to most European countries than the GRETA-based index, a moderately strong correlation was found between the two indices. This is an encouraging result lending support to the validity of the assessments of both monitoring mechanisms as well as to their transformation into quantitative scores. We also demonstrate that the detailed GRETA-based index can be used to identify best practices in anti-trafficking policies and specific areas where these policies are most in need of improvement, e.g. legal aid and compensation for victims. Our analyses of the relationships between the various items of the index revealed positive correlations between the existence of units of specialized prosecutors and the numbers of convictions of traffickers. Our paper, then, demonstrates the potential of quantitative indices of counter human trafficking policies as tools for both effective monitoring of the implementation of international standards and for analytical purposes.