Do check the “DLs” and “Rating” columns on Hackage. There you’ll see that cql-io is used a lot more than cql and it has a higher rating. And watch out for old packages, e.g. in Hackage also lists cassandra-cql which does have the highest rating, but that was last updated in 2015, so it might not even compile properly with the latest versions of GHC. So, I think the number of downloads are more important than the rating.