OpenRouter, founded in 2023, provides a unified API interface that gives developers access to more than 300 large language models from over 60 providers through a single integration. The platform eliminates vendor lock-in by offering intelligent model routing, automatic fallbacks, and consolidated billing across providers. It processes over 100 trillion tokens annually and serves more than 5 million users worldwide.
The company operates in the AI infrastructure space, serving developers and enterprises building on large language models. Its platform covers technical domains including AI model access, LLM marketplace functionality, and multi-provider infrastructure. Key features include real-world usage insights and transparent pricing without subscription requirements.
OpenRouter raised a $40 million Series A round backed by Andreessen Horowitz, Menlo Ventures, and Sequoia Capital. The company focuses on developer experience and enterprise-grade reliability as core product principles. It is based in the United States with a global user base.