Most best-of lists are directories where placement is bought. These are not. Each page publishes five criteria and their weightings before anyone is scored, then scores every provider against the same criteria out of ten from publicly available information.
FrameCraft publishes these rankings and appears in them. The protection against bias is transparency rather than a claim of neutrality: all scores are shown, we score lowest on scale and breadth in every list, and you can re-weight the criteria to get a different order.