Castbox is a Hong Kong-based podcast company. The company both hosts and produces its own podcasts. Castbox was founded in 2016 by company CEO Renee Wang in Beijing, China. It also has offices in San Francisco and Hong Kong. In 2017, the company raised $16 million, and an additional $13.5 million in 2018.
Castbox is the leading global spoken audio platform pioneering in-audio search to deliver contextual recommendations for listeners of podcasts, on-demand radio, and audiobooks. Since its launch in 2016, Castbox has gained over 15 million users worldwide. In June 2019, Castbox integrated with Waze (a GPS navigation software app and a subsidiary of Google), allowing playback controls to pause, skip, or restart episodes. Castbox is the best free podcast app with over 95 million volumes of content on Android, Apple iPhone, Amazon Alexa, Google Home, Carplay, and Android Auto.