Curiosity Stream (legal company name Curiosity Stream Inc.), formerly branded as CuriosityStream and sometimes referred to simply as Curiosity, is an American media company and subscription video streaming service that offers documentary programming including films, series, and TV shows. The company offers a video-on-demand subscription service branded as "Curiosity Stream" and a linear broadcast television channel known as the Curiosity Channel.

The service was launched in 2015 by the founder of the Discovery Channel, John S. Hendricks. As of 2021, it was reported to have approximately 20 million subscribers worldwide across its direct and bundled platforms.Curiosity Stream produces original documentaries and series including Royals: Keeping the Crown, The History of Home, Miniverse, Stephen Hawking's Favorite Places, David Attenborough's Light on Earth, and Deep Time History; and additionally features content from producers such as the BBC and NHK.