About Us

Ex Parte provides your company with the data and insight to make smart and informed decisions on the most important legal issues facing your organization.

Every year, corporations spend more than $250B on litigation in the United States alone. And yet, critical decisions such as whether to litigate or settle or where to file suit or which attorney to hire, are all made the same way they were 100 years ago.

We are applying artificial intelligence, machine learning, and natural language processing to provide our customers with the insight they need to make highly informed decisions and gain a winning advantage. Think of it like Moneyball, but for a market >20x the size of Major League Baseball.


Jonathan Klein


Jonathan founded Ex Parte in 2017. He is the former president & chief legal officer of MicroStrategy (Nasdaq: MSTR), the largest independent publicly-traded analytics and business intelligence company. Before MicroStrategy, he served as an appellate litigator with the United States Department of Justice, and a law clerk for the Hon. Jerome Farris of the United States Court of Appeals for the Ninth Circuit. Jonathan holds a B.A. in Economics from Amherst College and a J.D. from Harvard Law School.

Roman Weisert


Roman is the Chief Technology Officer of Ex Parte, and brings 15+ years of engineering and product management experience. Previously, he was managing architect for EastBanc Technologies, where he led big data projects for clients such as Microsoft, Sands Capital, and the federal government. Before EastBanc, Roman served as product manager for Fortress Solutions and a senior software developer for Sitronics. Roman earned a Master of Science degree from Novosibirsk State Technical University. In his free time, Roman enjoys to ski and kite surf with his wife and daughters.