Stripe to Acquire OpenRouter: Why Everyone Is Obsessed With Model Routing | Menlo Ventures
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Stripe to Acquire OpenRouter: Why Everyone Is Obsessed With Model Routing
August 19, 2026
Matt Murphy, Deedy Das
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Today, OpenRouter announced that they have entered into an agreement to be acquired by Stripe, three years from when it was launched in 2023.
OpenRouter launched as “the unified interface for LLMs” with only four models (GPT-3.5, GPT-4, Together’s GPT NeoXT, and Cohere xlarge) and two core bets: 1) AI usage will be massive and ubiquitous, and 2) there will be plenty of different models with their own sets of tradeoffs that users will want. Both of those things ended up being overwhelmingly true. Since their launch, token usage on OpenRouter has grown ~30,000x to a 4.5+ quadrillion-token annual run rate with a shockingly high spend on the platform. From a mere four models, OpenRouter now supports over 500!
OpenRouter token growth on a log scale from founding to acquisition
We at Menlo Ventures were fortunate enough to partner with this incredible team at the seed round in March 2025 through our Anthology Fund, in partnership with Anthropic. Founder and CEO Alex Atallah was formerly the founder of OpenSea, once valued at $13.3B. His co-founders were hacker extraordinaire Louis Vichy, someone he’d met on Discord, and the ferocious execution machine, COO Chris Clark. We led their Series A in May 2025 with Matt joining the board and Deedy as a board observer. We then doubled down in their Series B earlier this year after both seeing the explosion in their customers and revenue and a compelling roadmap to provide model intelligence. In technology, often it takes years of belief for an idea to become the consensus. That happened a few weeks ago, when over 10 different companies, from Ramp to Cursor, launched their own routers. In a short amount of time, OpenRouter has become one of the most important companies in the AI era.
Happy memories when we shook hands to lead the Series A at Blue Bottle in San Francisco
Stripe, at the outset, may seem like an unlikely acquirer for OpenRouter, but the similarities are uncanny. Both are drop-in APIs that simplify complex transactions with a take rate. The latter just does it solely for AI models. Together, true to Stripe’s mission, they increase the GDP of the internet.
Presciently, OpenRouter described themselves as the Stripe for LLMs over a year ago.
Why We Invested in OpenRouter
OpenRouter was one of the first companies Deedy met after joining Menlo in 2024. The product sat squarely in the center of our AI infrastructure thesis. Menlo’s 2024 Enterprise AI report states two of the core beliefs we had to hold to invest in OpenRouter: that AI spending would rise dramatically and that developers would adopt multiple models.
The first outbound email from Menlo to OpenRouter
It was very clear to us, who also code and use these models, that there are radically different cost, latency, and performance tradeoffs between different models. You don’t necessarily need the frontier intelligence of Fable when you’re doing a simple NLP task of identifying entities in text. But it is way too cumbersome for users to go into each different model company’s website, create an account, figure out how to create a key, make sure they keep the key safe, make sure they align to that model’s slightly different API endpoint spec, and then do model management themselves. A central gateway might seem simple, but it’s actually deceptively difficult infrastructure that few would want to build and maintain.
In venture, we often talk about moats, but purely in the technical sense. OpenRouter had a classic moat of scale—more users, more ability to predict demand and handle load, easier to scale contracts with labs and have predictable demand for tokens—eventually getting to a place where new model labs want to list on OpenRouter first for distribution. And one of the things we’ve observed ever since the acceleration of software startup formation with vibe coding being ubiquitous is that, to break into enterprise, buyers end up choosing the product that has already won the hearts and minds of the developers at their companies. Think about Anthropic, OpenAI, xAI, Cursor, Cognition, ElevenLabs, Lovable, Fireworks—all of them won the developer first! So did OpenRouter.
Since investing:
OpenRouter now processes 30,000x the number of tokens they did at launch, growing 33% MoM for three years and consistently doubling every 11 weeks.
The model landscape exploded with fantastic open-source models from China (DeepSeek, GLM, Kimi), Grok, Meta, and Thinking Machines. OpenRouter supports over 500 models on over 80 providers for 10M...