Zep AI

Zep AI builds the context engineering infrastructure that makes AI agents actually useful. Their platform - powered by a temporal knowledge graph called Graphiti - gives agents persistent memory across sessions, letting them track what users said, what changed, and when. Founded in 2023 and backed by Y Combinator (W24), the San Francisco team hit $1M ARR within months of launch and now serves 240+ customers including Fortune 500 companies. With 25,000+ GitHub stars on Graphiti and a published arXiv paper, Zep is quietly becoming foundational infrastructure for the AI agent era.