Stream, a creator of enterprise-grade activity feed and chat APIs, has closed a $38 million Series B funding round, led by Felicis Ventures' Aydin Senkut with participation from Series A lead investor GGV Capital and 01 Advisors.

Stream provides APIs which enable product teams to build chat and activity feeds for their applications at scale in a fraction of the time and cost of developing in-house. Stream powers in-app experiences for more than a billion end-users, working with customers in segments as diverse as healthcare, education, finance, virtual events, dating and social. Notable customers include TaskRabbit, NBC Sports, Unilever, Delivery Hero, Gojek, eToro and Stanford University.