Chai-Research

Chai Research (CHAI) is a leading conversational generative AI platform where users can create, share, and interact with character-based AI chatbots powered by proprietary large language models fine-tuned for social engagement. Founded in 2021 and headquartered in Palo Alto, California, it operates a consumer mobile app (iOS and Android) with over 500,000 community-created AI characters spanning entertainment, roleplay, companionship, and interactive storytelling. The platform also includes Chaiverse, a developer-facing environment where AI researchers can submit and benchmark their own LLMs against real users for live evaluation and cash prizes. CHAI trains its models using RLHF and model-blending techniques, serving over 1 million daily active users and $70M/yr in revenue as of 2026.