
Serving Data for Production AI
Feast is a mature open-source feature store that addresses the critical challenge of serving consistent features for machine learning applications across training and production environments. It offers broad integration capabilities and has evolved to support modern AI workloads including LLM-based RAG applications, backed by a substantial community and proven enterprise adoption.

Feast is an open-source feature store designed to deliver structured data to AI and machine learning applications at scale during both training and inference phases. The platform enables organizations to define, manage, discover, and serve features consistently across their entire machine learning workflow, bridging the gap between data engineering and ML operations. With over 12 million downloads, 293 contributors, and a thriving community of 5,500+ Slack members, Feast has established itself as a leading solution in the MLOps ecosystem. The platform supports a wide range of use cases including real-time recommendations, fraud detection, risk scoring, and customer segmentation. Feast integrates with various offline and online data stores, allowing teams to connect with their existing technology stack while maintaining feature consistency across training and production environments. Recent developments have expanded Feast's capabilities to support modern AI applications, including Retrieval Augmented Generation (RAG) for LLM-powered systems, distributed processing with Ray, and seamless integration with MLOps platforms like Kubeflow.