OpenAI Leads AI Adoption Among U.S. Enterprises, Leaving Competitors Behind

OpenAI is rapidly advancing its position in the enterprise AI market, outpacing competitors in winning business subscriptions, according to recent transaction data from fintech firm Ramp.
As reported in Ramp’s AI Index, which tracks business adoption rates of AI products based on data from card and bill payments, 32.4% of U.S. businesses were subscribed to OpenAI’s models, platforms, and tools by April 2025. This marks a significant increase from 18.9% in January and 28% in March.
In contrast, competitors are struggling to keep pace, with only 8% of businesses having subscriptions to Anthropic’s products in April, up from 4.6% in January. Google AI saw a notable decline, falling from 2.3% in February to just 0.1% in April.
“OpenAI continues to add customers faster than any other business on Ramp’s platform,” said Ara Kharzian, Ramp’s economist, in a blog post released on Tuesday. He noted that the Ramp AI Index indicates accelerating adoption of OpenAI’s services compared to its rivals.
It is important to acknowledge that Ramp’s AI Index has limitations. It analyzes spending data from around 30,000 companies, which means it may not capture all AI-related expenditures that are categorized differently within businesses.
Despite these limitations, the data suggests OpenAI is solidifying its hold on the expanding enterprise AI market. According to an April report from the company, OpenAI has surpassed 2 million business users, a significant rise from 1 million reported last September. The firm anticipates that enterprise revenue will play a crucial role in its financial growth, projecting revenues of $12.7 billion for this year and $29.4 billion by 2026.
While OpenAI does not expect to be cash-flow positive until 2029, it is considering charging businesses significant fees for specialized AI “agents” aimed at assisting with software engineering and research tasks, further enhancing its revenue potential in the competitive AI landscape.