Following the money? Make your first stop California. Home to some of the most prominent U.S. venture capital firms, California attracts 47 percent of venture dollars, according to Pitchbook. But that's just part of the story. To gauge the dynamics powering the state's hottest private companies, Inc. crunched their numbers between 2016 and 2018. Here’s a look what's driving California's fast-growth businesses: What they do, where they do it, and how they contribute to the state's economy in the process.