HIX Compare is the only dataset with information on nearly every individual and small group marketplace plan offered from 2014-2018, and most off marketplace plans as well. HIX Compare contains information on plan characteristics, such as premiums and benefit design. HIX Compare is a machine readable file available in CSV and Stata formats.

Here is the HIX Compare data documentation.  The data have been used for a variety of purposes including measuring the effect of risk corridor programs on premiums, the presence of narrow networks, and many other studies.