I’m not familiar with MBFC. It may be similar but I don’t mind throwing some $$ at any project making these efforts. What I like about Ground News is that all the sources for a given story are aggregated to one page, sorted based on political bias, and rated on accuracy. That information combined with the “Blindspot” feature (which highlights when a story is disproportionately covered more by one side) is very powerful IMO. It looks like the blindspot feed it’s available to non-subscribers but doesn’t include the political bias of the source: https://ground.news/blindspot

The nice part about Ground is that they take the event being reported on, then show the news sources and how they’re reporting on them.

For instance, let’s say a white cop shoots a black jogger. Ground will take the news sources for that event, and line them up on a left/right bias chart based on their historic reporting records. So you can see how the two sides (and the center) are reporting on the same story. For instance, AP (historically just left of center) will be very dry, and only report “police shoot black jogger”. Far right outlets will post something about a heroic officer protecting communities, being forced to shoot a fleeing black man. And far left outlets will post about white supremacist cops gunning down an innocent black man.