Chalk builds a real-time data platform for AI inference, enabling low-latency machine learning and LLM pipelines. Its Compute Engine lets teams write features in pure Python that are automatically compiled into high-performance C++ and Rust pipelines, removing complex ETL. Chalk’s LLM Toolchain unifies structured and unstructured data with native vector storage, automated evaluations, and integrations with major LLM providers. Customers named in the article include Doppel, Sunrun, Whatnot, Socure, Found, Medely, Iwoca, and MoneyLion across fintech, identity, healthcare, and e-commerce. The platform is used for instant loans, fraud prevention, personalized recommendations, content moderation, and clean energy optimization, and the company touts 5-millisecond data pipelines at scale. Chalk plans to use new capital to accelerate product development, onboard customers, and grow engineering and go-to-market hubs in San Francisco and New York. Founded in 2022 and headquartered in San Francisco, Chalk has raised over $60M to date. Chalk builds a data platform designed for real-time machine learning and generative AI, offering a compute engine, LLM toolchain, feature store, integrated monitoring, and branches for data-science experimentation. Its Rust-based engine compiles Python feature definitions into parallel pipelines that serve both temporally-consistent training sets and live feature values, reducing pipeline drift between training and inference. Chalk emphasizes a best-in-class developer experience that enables teams to fetch fresh data from APIs, microservices, and transactional databases rather than relying on pre-computed warehouse extracts. The platform is already used by customers including Melio, Mission Lane, Pipe, Ramp, Vital, and Whatnot for mission-critical decisions like fraud detection and patient triage. Chalk plans to use new capital to accelerate product development, expand customer acquisition, and grow its engineering and go-to-market teams. The company highlights founder and executive experience across Palantir, Affirm, Credit Karma, Google Wallet, and Stripe acquisitions, which the team says informs its product and go-to-market strategy.

Total raised

$60M

Funding rounds

2

Latest round

Series A

Latest activity

May 2025