Anthropic Surpasses OpenAI in Verified Business Customers for the First Time

Anthropic has achieved a significant milestone by surpassing OpenAI in terms of verified business customers, as reported in the latest AI Index by Ramp, a fintech firm. The survey analyzed client expense data and revealed the following key points:

• 34.4% of businesses are now paying for Anthropic services, while 32.3% are paying for OpenAI.
• This marks the first time Anthropic has taken the lead in this metric.
• Ara Kharazian, an economist at Ramp, stated that Anthropic is leading primarily among industries like finance, tech, and professional services. OpenAI still holds sway in other sectors, although this lead is diminishing.
• The data encompasses over 50,000 companies, suggesting a broad and diverse sample size, though it primarily represents firms using Ramp services.
• OpenRouter's leaderboard reflects a similar pattern, with OpenAI last ranked above Anthropic in December 2025.
• Over the past twelve months, Anthropic's paid business clientele grew from 9% to 34.4%, while OpenAI experienced a slight decline.
• Kharazian noted that Anthropic's strategy focused on starting with a technical customer base and expanding through tools like Cowork has been successful, though the long-term sustainability of this advantage remains uncertain.