B2B e-commerce unicorn udaan has raised $120 million from existing investors in convertible notes and debt. In the last four quarters, udaan has raised more than $350 million via convertible notes and debt. Founded in 2016 by former Flipkart employees Amod Malviya, Sujeet Kumar and Vaibhav Gupta, udaan is aiming to go public in the next 12-18 months.