Chalk is a technology company that builds an AI data platform designed to provide real-time context and compute infrastructure for agents and machine learning models. The platform is deployed within a customer's own cloud environment, combining the performance characteristics of Rust with Python-native tooling. The company's technical work spans systems engineering, query planning and optimization, distributed analytical data processing, and real-time and ML infrastructure.
The platform serves industries including finance, risk management, fraud prevention, identity verification, and clean energy. Chalk maintains offices in San Francisco and New York.
The company states it hires people who strive to be among the very best in their fields, with a culture centered on exceptional software craftsmanship and a commitment to continuous growth. The team is described as a diverse group with a deep commitment to excellence.





