Wine predates crossover by a few years. The company behind crossover is CodeWeavers (https://en.wikipedia.org/wiki/CodeWeavers https://en.wikipedia.org/wiki/Cod

Wine predates crossover by a few years. The company behind crossover is CodeWeavers (https://en.wikipedia.org/wiki/CodeWeavers https://en.wikipedia.org/wiki/CodeWeavers), founded and run by mostly the same Wine core developers. Crossover is a paid-for version of Wine with more patches/hackwork which may be less acceptable in the wine mainline (think of it somewhat like wine-staging: https://www.wine-staging.com/ https://www.wine-staging.com/), as well as commercial support. I really like their model. It allows Wine to thrive as a foss project and gets the project funded.