I don't get it:

http://www.jgraph.com/mxlicense.html is a non-free license, but https://github.com/jgraph/mxgraph/blob/master/license.txt is non-commercial Creative Commons

Can I get a perpetual commercial license for mxGraph today?

https://www.draw.io/about.html says

"As Pro Plus® ++

Unlimited Users Unlimited Drawings Full Source Code

$0 / diagram / cpu / user / hour"

And how did you get permission to display all those customer logos on your page? -- Fortune 500 usually negotiate compensation for using their logos like that, which a vendor of a free product wouldn't have time/incentive to deal with.