Audio content platform Kuku FM has raised $21.8 million in its Series B1 funding round which was led by Nandan Nilekani-backed Fundamentum Partnership. As part of this investment, Prateek Jain, a Principal at Fundamentum, will join Kuku's board. Kuku was founded in 2018 by Lal Chand Bisu, Vikas Goyal and Vinod Kumar Meena and currently has 1.6 million paid subscribers.