According to fintech company Ramp’s latest AI Index, Anthropic now has more verified business customers than OpenAI, marking a significant milestone in AI adoption trends among enterprises.
- Anthropic leads with 34.4% business customer share versus OpenAI’s 32.3%
- Ramp data covers a diverse sample of 50,000+ businesses using AI services
- Anthropic’s customer base grew from 9% to 34.4% in 12 months
What happened
Based on expense data from Ramp’s platform, Anthropic now serves a larger share of business customers than OpenAI for the first time. The AI Index shows 34.4% of participating companies pay for Anthropic’s AI services compared to 32.3% for OpenAI. This represents a notable shift in the market dynamic between two leading AI labs.
The data sample includes over 50,000 businesses, providing a broad and diverse set of insights. Over the previous year, Anthropic’s business customer share surged from just 9% in May 2025 to 34.4%, while OpenAI’s share slightly declined by 1% during the same period. The overall use of AI products in businesses rose by 9%, pointing to growing AI adoption overall.
Why it matters
Anthropic’s ascent signifies successful execution of a customer-focused strategy. By initially targeting technical customers in industries such as finance, technology, and professional services, Anthropic was able to establish a solid foundation before expanding the reach of its products through broader tools like Cowork.
This shift in leadership challenges OpenAI’s previously dominant position in AI business adoption and highlights evolving enterprise preferences amid increased competition. Ramp’s economist Ara Kharazian notes the trend reflects Anthropic’s well-strategized growth, though he remains cautious on how long this advantage will persist amid the volatile AI landscape.
What to watch next
Monitoring whether Anthropic can sustain its lead or if OpenAI will regain ground is a key trend to watch in AI adoption metrics over coming months. Changes in enterprise demand, product innovations, pricing, and partnerships will influence market shares moving forward.
Additionally, broader AI adoption trends within businesses will be crucial to watch, especially as more sectors integrate AI-powered tools. Ramp’s data, while reflecting a large fintech client base, may evolve alongside shifts in other industries and platforms tracking AI usage.