San Francisco-based API development startup Postman has raised $150 million in Series C round led by Insight Partners, with participation from CRV and Nexus Venture Partners. Founded in Bengaluru by Abhinav Asthana, Abhijit Kane and Ankit Sobti, Postman's valuation rose to $2 billion from $350 million in 2019, marking its entry into India's Software as a Service (SaaS) 'unicorn club'.