Justin So is the Founder and CEO of Sidekick (YC S26), an AI-powered SMS assistant that serves as the knowledge and operations layer for frontline workers in manufacturing, auto dealerships, and retail.

Justin holds a Master's degree in Computer Science from the University of Pennsylvania and previously worked in Finance at Arm, bringing a rare blend of technical and financial expertise to the deskless workforce problem.

The inspiration for Sidekick came directly from watching his father's manufacturing facility struggle with fragmented knowledge systems, lost institutional expertise, and inaccessible information at critical moments.

Justin built Sidekick to let any worker text a question in any language and receive instant answers from company documents, with no app download or login required, working on any phone.

Sidekick is backed by Y Combinator (S26 cohort) and is already live across 20+ plants serving 600+ frontline workers, targeting a global deskless workforce of approximately 2.7 billion people.