2 minute read | June.30.2025
OpenRouter has raised $40 million across Series Seed and Series A financing rounds, led by Andreessen Horowitz and Menlo Ventures.
Orrick represented OpenRouter.
Founded in 2023 by Alex Atallah and Louis Vichy, OpenRouter provides a single, standards-compatible API that lets developers and enterprises tap into 400+ large-language-models (LLMs) from OpenAI, Anthropic, Google, Mistral and more—without rewriting code or renegotiating contracts. OpenRouter’s rankings and LLM leaderboards are available publicly and are a key source of industry data and trends.
With edge-global infrastructure, privacy-first design, real-time accounting, and unified billing, OpenRouter is the emerging standard for AI inference at scale.
The investment will accelerate product development, bring new types of models to the platform, and expand enterprise support as OpenRouter becomes the default backbone for organizations that rely on multiple AI models.
“Inference is the fastest-growing cost for forward-looking companies, and it’s often coming from 4 or more different models. The sophisticated companies have run into these problems already, and built some sort of in-house gateway. But they’re realizing that making LLM’s “just work” isn’t an easy problem. They’re ripping out home-grown solutions and bringing in OpenRouter so they can focus on their domain-specific problems, and not on LLM integration,” said Alex Atallah, co-founder and CEO of OpenRouter. “This round lets us keep shipping at the speed developers expect while delivering the uptime, privacy, and IT guarantees that enterprises demand.”
Josh Pollick and Alexandra Wood led the Orrick team that advised OpenRouter, which also included Daniel Garber, Ally Aquilina-Piscitello, Shannon Yavorsky, Ramin Tohidi, Zack Goldman, Luke Tenley and Alexandra Beezy.
In 2025, Orrick has advised on over $11.2 billion in financings or M&A transactions for AI and machine learning companies across more than 170 transactions.