Software testing platform BrowserStack has raised $200 million in its Series B round led by San Francisco's BOND. With a valuation of $4 billion, BrowserStack has become India's 15th startup to achieve the unicorn status this year. Founded in 2011 by Ritesh Arora and Nakul Aggarwal, BrowserStack first raised capital in 2018 when Accel invested $50 million in the startup.