Krief Guy


Upstream S.A

Guy is Upstream’s Chief Executive Officer. He drives Upstream’s strategic vision and growth into new geographies and products. Guy joined Upstream in 2004 and since then has served in multiple Marketing and Operational roles. Prior to becoming CEO, Guy held the position of Upstream’s Chief Innovation Officer.

Guy has also co-founded Persado, a Bain Capital Ventures backed company, where he has served as the company’s SVP of Product & Innovation, in charge of product management, algorithmic research, and software development.

Guy has followed a diverse career path, which has seen him own a French pastry shop, found a messaging start-up, write and star in his own TV comedy series and host his own radio show. He was also previously a marketing manager for Wanadoo, France Telecom, in Paris, which became Orange. Guy holds a Master’s degree in Social Psychology from the Sorbonne in Paris.