Koji is an AI-native customer research platform that conducts in-depth interviews by voice, chat, or phone with hundreds of participants simultaneously. It uses research-grade AI agents to design studies, moderate natural conversations, and probe for deeper answers across 30 or more languages. The platform automatically synthesizes responses into themes, quotes, and sentiment reports, delivering decision-ready insights in hours rather than weeks. Koji includes flexible recruitment, structured and open-ended question types, full transcript traceability, and a REST API with MCP support for integration with tools like Claude and ChatGPT.