Read through enough contracts, invoices or purchase orders—any business documents, really—enough times, and your eyes probably glaze over. Ondrej Antos experienced it as a law clerk nearly a decade ago. When Antos met Nischal Nadhamuni at the Massachusetts Institute of Technology in 2016, the pair went on a three-hour-long walk in Cambridge, Mass., and decided to start a company to tackle the problem.Klarity, their startup, began in 2017 by building document review tools for law firms and pivot...