The ASF, chartered as a 501(c)(3) nonprofit charity which serves the public good, has a budget a fraction the size of those of orgs chartered as 501(c)(6) nonprofits which serve the common business interests of members.

The PSF is also 501(c)(3) (https://www.python.org/psf/mission/).

A quick check implies Apache is on the order of half the size, though. When I wrote the other comment it was just the only other name that came to mind.