Anthropic has overtaken OpenAI in verified business customer adoption for the first time, according to new data from fintech platform Ramp.
Ramp’s latest AI Index, which analyzes expense data from more than 50,000 companies using its payment and finance platform, found that 34.4% of participating businesses are now paying for Anthropic services, compared with 32.3% for OpenAI. It marks the first time Anthropic has held the top position in the survey.
According to Ramp economist Ara Kharazian, Anthropic had already established a lead among highly technical industries including finance, technology, and professional services before expanding into broader enterprise categories.
The data also illustrates how rapidly Anthropic has grown over the past year. In May 2025, only 9% of surveyed businesses were paying for Anthropic products. That figure has since increased by 26 percentage points over a 12-month period. During the same timeframe, OpenAI’s business adoption share declined by roughly 1%, while overall enterprise adoption of AI products across the survey increased by 9%.
Kharazian said Anthropic’s strategy of initially focusing on technical customers and developer-oriented use cases helped establish stronger traction within enterprise environments before broader expansion through products such as Claude Cowork.
The findings align with broader market signals suggesting growing enterprise adoption of Claude models. OpenRouter usage rankings, which track another segment of AI users and developers, last showed OpenAI ahead of Anthropic in December 2025.
Ramp noted that the index is not a complete representation of the overall AI market because it only reflects companies using its platform. However, the dataset remains one of the largest publicly discussed indicators of verified commercial AI spending activity.
Enterprise AI Competition Shifts Toward Deployment And Reliability
The report highlights how competition between leading AI companies is increasingly being shaped by enterprise deployment rather than consumer visibility alone.
Anthropic has spent much of the past year expanding its presence in regulated industries and enterprise workflows, particularly in finance, cybersecurity, operations, and software development. Its Claude family of models has gained traction among businesses seeking longer context handling, coding assistance, and AI agents designed for workplace tasks.
The company has also aggressively expanded enterprise infrastructure and partnerships in recent months, including new deployment initiatives, financial services AI agents, cybersecurity tools, and large-scale compute agreements aimed at supporting business demand.
Meanwhile, OpenAI continues to maintain a dominant consumer footprint through ChatGPT while simultaneously pushing deeper into enterprise deployments through consulting partnerships, deployment services, and productivity integrations.