You can find rankings for the best compact hybrid cars on the U,S. News & World Report website. The website ranks hybrid cars based on a consensus of reviews from major publications and reliability data about the vehicles.
While U.S. News & World Report does not rank compact hybrids separately from other models, most of the cars in its rankings are either mid-size or compact vehicles. The highest ranked compact hybrid as of April 2015 is the 2015 Toyota Prius V. The Prius V is ranked at no. 5 among currently available hybrid vehicles, though U.S. News & World Report considers it a wagon rather than a compact car despite its small size.