OpenRouter sells itself for 7 billion US dollars.

On August 16 local time in the US, Stripe acquired OpenRouter at a price of over 7 billion US dollars.

OpenRouter is currently the most popular routing platform that connects developers with different AI model vendors. Through a unified interface, developers can call hundreds of models, and the platform is responsible for model routing, failover, usage statistics, billing and settlement.

The key to Stripe's acquisition of OpenRouter is that with the increasing number of AI models, enterprises begin to use models from different vendors at the same time. The position of OpenRouter has also extended from a pure developer tool to the layer of model selection, invocation and payment.

01 Valuation increased 5 times in 3 months

OpenRouter was founded in 2023, with total financing exceeding 150 million US dollars. In May this year, OpenRouter just completed a Series B financing of 113 million US dollars, with a valuation of about 1.3 billion US dollars.

Less than three months later, Stripe offered an acquisition price of over 7 billion US dollars. Calculated at this price, OpenRouter's valuation has increased by more than 5 times compared with the previous round of financing. Earlier, *The Wall Street Journal* reported that Stripe had discussed an acquisition price of about 10 billion US dollars with OpenRouter.

Alex Atallah, the founder of OpenRouter, previously co-founded the NFT marketplace OpenSea. In 2017, he co-founded OpenSea with Devin Finzer and served as the Chief Technology Officer, left in July 2022, and founded OpenRouter less than a year later. Earlier this year, Atallah once called OpenRouter "the Stripe of the AI field".

The user scale of OpenRouter is also expanding rapidly. In May this year, OpenRouter stated that the platform had served more than 8 million developers and provided access to more than 400 AI models. The data disclosed on the company's about page currently shows that it has more than 10 million global users, processes more than 200 trillion Tokens every month, and connects more than 80 vendors and over 500 models.

02 The more models there are, the more important routing becomes

The growth of OpenRouter is directly related to the increase in the supply of AI models.

Models from Anthropic and OpenAI are still widely considered to have strong capabilities, but Chinese companies are providing lower-priced alternatives, and these models have been able to meet practical needs in many tasks. Developers therefore need to choose between model capabilities, price, latency and availability, instead of always using the same vendor.

OpenRouter provides services at this layer. Developers only need to connect to one interface to access different models, without the need to separately develop and maintain interfaces for each vendor. If a certain model fails, the platform can also switch to other vendors; enterprises can also set budgets, data policies and zero data retention requirements.

In May this year, OpenRouter said its main growth came from developers who are adding agent capabilities to software. Agents need to call different models, tools and data sources when performing different tasks, so the switching between models will be more frequent. OpenRouter gathers these vendors on one platform, and also puts model selection and usage costs in the same system.

AI analyst @danizhu's judgment on this transaction also starts from this layer.

He believes that Stripe previously turned the scattered financial infrastructure into programmable services through APIs, and OpenRouter is doing similar things for hundreds of AI models. If the transaction is completed, Stripe will be closer to the "transaction layer" in the AI economy, because in a multi-model environment, the infrastructure connecting model supply and developer demand may have similar strategic value as the models themselves.

This is also the reason why OpenRouter's business can still grow after the price of open-source models drops.

For developers, if a lower-priced model can already complete the task, they can switch to it through the routing system; if a certain model fails, they can also switch to other vendors. The more models there are, the more direct the value of the platform that can compare and schedule these models will be.

03 Stripe's real bet

Stripe has already participated in OpenRouter's payment and billing system before.

Stripe once introduced how OpenRouter uses its products to issue invoices, calculate taxes, accept local payment methods and manage fraud, while connecting model costs, usage volume and customer bills.

OpenRouter mainly generates revenue through platform service fees. Under the pay-as-you-go model, users pay according to the actual model invocation volume, OpenRouter charges a 5.5% platform fee, and passes the inference cost of model vendors to customers. It is responsible for recording the model used in each request, the Token usage and the corresponding cost, while Stripe provides payment, billing and settlement services.

After the acquisition, the two sets of businesses will belong to the same company.

At Stripe's conference in April this year, it launched streaming payment for AI products, combining usage statistics and frequent settlement to settle accounts based on Token consumption. The model routing and Token usage data mastered by OpenRouter is exactly at the front end of this system.

External observer @Zevryn0 explained that OpenRouter is not developing the next cutting-edge model, but providing infrastructure for access, comparison, routing and cross-vendor payment inference between developers and models; Stripe already has payment and financial infrastructure, and after acquiring OpenRouter, it can further enter the layer of AI inference.

He also believes that a bigger change is that if AI agents can independently perform tasks and generate transactions in the future, the connection between model inference, payment and transactions needs to be established, and what Stripe hopes to occupy is exactly one of the infrastructure channels.

Korean user @cozybearlog focuses on the metering function of OpenRouter.

He believes that after OpenRouter completed the financing at a valuation of about 1.3 billion US dollars for only 82 days, it obtained an acquisition price of over 7 billion US dollars. What is really worth noting is not how many times the valuation has increased, but that Stripe is acquiring "the meter between developers and models".

In his judgment, Stripe already has online payment, and OpenRouter masters the metering and routing when AI developers call models. After the two are combined, the AI gateway may further evolve from a developer tool to a part of the financial infrastructure.

All these judgments point to the same business change: after there are more and more model vendors, enterprises not only need the models themselves, but also a unified entrance to select models, switch vendors, record Token usage and complete payments.

Judging from the currently disclosed information, the core of Stripe's acquisition of OpenRouter is not to obtain a new large model, but to further extend its original payment and financial infrastructure to the AI model invocation link. OpenRouter will become the middle layer connecting developers, model vendors and AI expenditures.

This article is from the WeChat official account "Tencent Tech", written by Su Yang, edited by Xu Qingyang, and published with authorization from 36Kr.