OpenRouter raised $40 million in combined seed and Series A funding, led by Andreessen Horowitz and Menlo Ventures. The funding will expand AI model access and routing tools, now valuing the company at $500 million.

Jun 27, 2025•about 1 month ago

Amount Raised

$40 Million

Round Type

seed

New YorkSoftwareCloud InfrastructureMachine LearningArtificial Intelligence

Investors

SequoiaMenlo VenturesAndreessen Horowitz

Description

OpenRouter has secured $40 million in combined seed and Series A funding, aiming to unify AI model access across a fragmented ecosystem. The funding round was co-led by Andreessen Horowitz and Menlo Ventures, with participation from Sequoia. This capital will enhance the scalability, reliability, and privacy features of OpenRouter’s routing platform. Launched in 2023, OpenRouter aggregates access to various large language models, improving cost-efficiency and performance.

Company Information

Company

OpenRouter

Location

New York, New York, United States

About

OpenRouter is the emerging standard for AI inference at scale, offering a single, standards-compatible API that gives developers and enterprises seamless access to over 400 large language models from providers like OpenAI, Anthropic, Google, Mistral, and more—without the need to rewrite code or renegotiate contracts. Founded in 2023 by Alex Atallah and Louis Vichy, OpenRouter features public LLM leaderboards and rankings that serve as a vital industry resource. With a privacy-first design, edge-global infrastructure, real-time accounting, and unified billing, OpenRouter simplifies and streamlines AI integration across organizations.

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