Apollo GraphQL

Apollo GraphQL develops open-source and commercial GraphQL technologies, and provides a platform for API orchestration used by modern applications and AI agents. The company is headquartered in San Francisco and is venture-backed, with investors including Andreessen Horowitz, Matrix Partners and Insight Partners.

Its flagship product, Apollo GraphOS, unifies APIs into a composable graph and combines data composition with enterprise security and governance. The wider product line includes Apollo Client, a state-management library for GraphQL applications; Apollo Server, for building GraphQL APIs; Apollo Connectors, which offer declarative REST-to-GraphQL orchestration; the GraphOS Router, a high-performance runtime execution engine; and the Apollo MCP Server, which connects AI agents to existing APIs. Engineering work spans GraphQL, API management, graph-based data composition, high-performance routing and Model Context Protocol integration.

The company's open-source projects have recorded more than 1 billion downloads, and it describes itself as the standard for working with GraphQL. Named customers include Airbnb and Ticketmaster. The culture is developer-centric, with an emphasis on declarative, graph-based approaches and on combining open-source roots with commercial enterprise offerings.