Stripe's investor letter calls January the start of an AI 'singularity,' reports 41% growth

Stripe’s first-half 2026 investor letter declares that January 1, 2026 marked “the beginning of the singularity,” according to people who have seen the letter. The founders frame it as a measured inflection in long-term trends rather than a rhetorical flourish. The document was written by Stripe’s co-founders, brothers Patrick and John Collison.

The letter reports first-half revenue up 41% from a year earlier and free cash flow up 43%, the same people said. Stripe also claimed that 88% of the companies on the Forbes AI 50 list, including OpenAI and Anthropic, build on its payments platform, and that the share of its revenue coming from AI and crypto companies has more than doubled year over year.

The letter is also where Stripe confirmed the price of its OpenRouter acquisition at more than $8 billion, mostly in stock, and argued that staying private lets it fund deals like that without diluting investors.

None of the figures have been independently verified. Stripe is private and has not published the H1 2026 letter on its own site. The revenue growth and AI-customer concentration are the checkable claims once the letter is public. The “singularity” language is not a forecast anyone can hold Stripe to.

Coming from a payments company that sees transaction flows across much of the AI economy, the claim carries more signal than a vendor slogan. It is still a marketing document, written by founders with an interest in how their private company’s growth story reads.