Sidekick is an AI-powered SMS assistant for deskless and frontline workers in industries like manufacturing, auto dealerships, and retail. Workers can text questions in any language and get instant answers drawn from company documents, with no app or login required. The product supports multilingual queries, photo identification of equipment, and voice memos for hands-free use, while managers upload documents and video walkthroughs that become searchable knowledge bases and step-by-step tutorials. Sidekick is part of Y Combinator's Spring 2026 batch.