Chalk

Chalk is a developer-first, real-time data platform for AI and ML that helps teams build, deploy, and monitor production-grade features with Python. More than a feature store, Chalk delivers fresh features in under 10ms with on-demand compute and caching in your cloud, and supports complex streaming, scheduling, and composable data workflows powered by a Rust-backed engine. It enables ETL-free access to real-time structured data alongside deep learning and LLM outputs for low-latency inference and feature engineering. Founded in 2022 and based in San Francisco, Chalk targets engineering and ML teams productionizing real-time ML and GenAI applications.