Summary List PlacementThanks to a recent $600 million funding round at a $95 billion valuation in March, payments company Stripe has catapulted to becoming the most valuable tech startup ever. Sanjiv Kalevar, a partner at the 15-year-old Boston-based venture firm OpenView, believes that two specific strategies have helped the firm succeed. Neither OpenView nor Kalevar have any official relationship with Stripe, although his firm has invested in other enterprise technology companies like Datadog, Instructure, Workfront, Calendly, and Expensify, and he previously invested in the financial data app MX before he worked at OpenView.