Namita Gupta came from Facebook to join restaurant listings startup Zomato as chief product officer in August 2014. She had spent six years at the social network; her last position there was head of global games partner engineering. However, after just a year at Zomato, she put in her papers to become an entrepreneur. She has now founded Airveda, which makes personal air quality monitors. Gupta’s exit was followed by a slew of resignations at Zomato, including Tanmay Saksena, who took over her position for a brief period, chief marketing officer Rameet Arora and senior vice president-growth Durga Ragunath, who quit after seven months with Zomato.