Not sure how it matches feature for feature, but https://opensky-network.org has been crowdsourcing unfiltered ADSB data for longer, provides tools to view the data and supplies full API access to the raw data to academics and non-profits at no charge.
There's room for another provider, and at the same time lots of enthusiasts with the boxes will carry on sending it, like they do to other closed source, profit-making ventures like FlightAware and Flightradar24...
If you go to https://github.com/airframesio/ , it talks about how they want to eventually open source stuff, but mercy, like 90% of their stuff is private right now.
I would absolutely not go to airframes.io in it's current state.
Note that at the moment aiframes is for a completely different type of aviation-produced data (messages: acars, hfdl, vdl, ...). I am assuming that airframes.io will create an ADS-B feed too, now that the best open system (adsbexchange) is gone.
There's room for another provider, and at the same time lots of enthusiasts with the boxes will carry on sending it, like they do to other closed source, profit-making ventures like FlightAware and Flightradar24...