Anthropic Now Has More Business Customers Than OpenAI — and Is Coming for Small Businesses Too

Anthropics's Mythos AI grabbing headlines for finding bank security holes was just the beginning. Now comes the business reality check: Anthropic has officially passed OpenAI in business customer share.

According to Ramp's May 2026 AI Index — compiled from expense data across more than 50,000 companies — 34.4% of businesses are paying for Anthropic services versus 32.3% for OpenAI. That's a first. According to TechCrunch, Ramp economist Ara Kharazian confirmed it: "It is the first time Anthropic has held the top position."

Twelve months ago, only 9% of businesses were paying for Anthropic products. That number climbed 26 percentage points in a single year, according to Ramp data reported by TechCrunch. Over that same period, OpenAI's business share declined by 1%.

Now Anthropic Is Going Downmarket

Having conquered the finance, tech, and professional services crowd, Anthropic announced Wednesday the launch of Claude for Small Business — a new suite built directly into Claude Cowork, its task-automation platform.

Small business owners can toggle it on to get bookkeeping tools, business insights, ad campaign generators, and integrations with QuickBooks, Canva, DocuSign, HubSpot, and PayPal, according to TechCrunch.

Small businesses represent 44% of U.S. GDP and employ nearly half the private-sector workforce, but most of them have never gotten past using AI as a chat tool. Anthropic wants to change that.

To back it up, the company is launching a 10-city promotional tour starting in Chicago, offering free AI training workshops to 100 local small business owners per stop.

OpenAI Is Rattled

PBS News reported that OpenAI CFO Sarah Friar acknowledged the pressure directly, saying the company will release a new model for "high-value professional work" — internally codenamed Spud — "in short order." Friar described it as OpenAI's "smartest model yet" with stronger reasoning and better production reliability.

To free up compute for Spud, OpenAI killed the Sora AI video app. Friar called it "a little heartbreaking" but necessary.

The math is stark: 900 million weekly ChatGPT users, but 95% of them pay nothing, according to PBS News. OpenAI is valued at $852 billion and Anthropic at $380 billion — and both are losing more money than they make. Consumer buzz doesn't pay the data center bills.

The Revenue Gap Is Closing Fast

OpenAI still leads on raw revenue. According to a Shawn Kanungo analysis citing multiple sources, OpenAI hit $20 billion in annualized revenue by end of 2025. Anthropic hit approximately $5 billion ARR by August 2025, up from $1 billion at the start of the year, per UncoverAlpha data cited in the same analysis.

But Anthropic raised its 2026 revenue forecast to $18 billion — roughly 20% higher than its summer 2025 guidance, according to Seeking Alpha figures cited by Kanungo. If that projection holds, the revenue gap closes dramatically within this calendar year.

The Competitive War and Its Implications

Most reporting on this story treats it as a horse race narrative — who's winning, who's losing, AI drama. Yet the significance for regular people is direct and practical.

For the 36 million small business owners in America, this competitive war means cheaper, better tools are coming faster than anyone expected. Anthropic isn't doing this out of generosity — it's doing it because the enterprise market is getting crowded and downmarket is the next billion-dollar land grab.

One detail largely ignored: Anthropic is still restricting access to Mythos, its most powerful model — the one that outperforms human cybersecurity experts. While they court the local coffee shop with bookkeeping integrations, they're simultaneously holding back a weapon-grade AI tool.

Broader Implications

Small business owners should expect AI tools to improve significantly and become cheaper in the next 12 months. That's the direct result of OpenAI and Anthropic competing for market share.

For taxpayers watching federal agencies, defense contractors, and banks quietly adopt these same systems, the competitive pressure accelerating capability development should be matched by scrutiny of who's overseeing it. Currently, the companies are moving fast while Congress moves slow, and that gap is where real risks accumulate.