Stripe seals $7 billion deal to buy AI startup OpenRouter

Stripe has agreed to buy OpenRouter, the AI model marketplace, for more than $7 billion — a fivefold jump from the startup's $1.3 billion valuation three months ago, according to Bloomberg.

"OpenRouter is the Stripe of AI," Alex Atallah, OpenRouter's chief executive, said in May, describing the platform as a single gateway to hundreds of models that prevents vendor lock-in.

OpenRouter connects developers to more than 400 AI models from 80 companies, serving 8 million users and processing 200 trillion tokens a month. It takes roughly 5 percent of the usage fees it brokers, generating annual revenue of about $50 million, according to research firm Sacra.

The deal, which would be Stripe's largest since its 2010 founding, extends the payments company beyond its core business of processing $1.9 trillion in annual transactions into the infrastructure layer of the AI economy.

A Tollgate on the AI Economy

OpenRouter was founded in 2023 by Atallah, who previously co-founded the NFT marketplace OpenSea. The platform gives developers a single access point to models from OpenAI, Anthropic, DeepSeek and others, letting them switch between premium systems and cheaper alternatives depending on the task and budget. The startup says this prevents customers from becoming locked into any one provider.

Demand for such gateways has grown as model costs diverge sharply. Premium frontier models from OpenAI and Anthropic command higher per-token prices, while open-weight and Chinese systems such as DeepSeek undercut them on price. Developers building agentic features into their software need infrastructure that works across multiple providers, a requirement that has pushed many toward brokerage platforms.

The economics of the model brokerage business are straightforward: OpenRouter takes roughly 5 percent of the usage fees it brokers, a take rate that research firm Sacra estimates translates into annual revenue of about $50 million. The company raised $113 million in a Series B round in May at a reported $1.3 billion valuation, with backing from Sequoia, Andreessen Horowitz, Menlo Ventures and CapitalG, the growth arm of Alphabet. The Wall Street Journal reported last month that Stripe and OpenRouter were in talks, with an earlier report suggesting a price near $10 billion.

Model Brokers Draw Premium Valuations

The deal shows the premium acquirers are placing on companies that sit between businesses and the growing number of competing AI models. As Chinese firms offer cheaper alternatives that many developers consider good enough for routine tasks, platforms that evaluate and broker models have gained value.

LM Arena, which lets users compare AI performance side by side, saw its valuation climb to $1.7 billion in January from $600 million in May last year. Artificial Analysis, an Australian benchmarking service, has become a reference point for the industry, with engineers checking its scores when a new model launches. OpenRouter, which served as a dashboard showing which models developers actually use, may lose some of its neutrality now that a major US payments company owns it.

For Stripe, the acquisition is a bet that AI usage will increasingly flow through a single billing and access layer, much as online payments consolidated around its platform. The company processed $1.9 trillion in payments last year, and adding an AI gateway gives it a new source of transaction volume as businesses shift spending toward model inference.

Stripe, a private company, does not trade publicly, but the deal shows that AI infrastructure startups can command steep premiums. The fivefold valuation jump in three months could fuel further M&A in the sector, benefiting venture investors and public AI names alike. Neither company has publicly confirmed the transaction, and terms including regulatory conditions and expected closing date have not been disclosed.

This article is for informational purposes only and does not constitute investment advice.