Who's powered by JUCE?

I’ve seen lots of ads for sound software companies that seem to be doing very well. Is everyone using JUCE do you think, or are there usually proprietary engines being used?

idk which frameworks everyone uses but i do know that my favourite metering plugin was written with juce, and not even on a very recent version https://www.jthorborg.com/index.html?ipage=signalizer