Anthropic overtakes OpenAI: Ramp's corporate clients switch to Claude
The corporate AI market is experiencing a tectonic shift. According to the expense management platform Ramp, in May 2026, Anthropic's share of paid corporate subscriptions among its clients increased by 2.5 percentage points, reaching 41%. For comparison, OpenAI's figure remained virtually unchanged, hovering at 39.5%.
Ramp, which analyzes the financial flows of over 70,000 companies, is recording a steady trend: businesses are voting with their dollars for Anthropic's models, primarily the Claude Opus family. Notably, this growth occurred amid significant pressure on the company from the Donald Trump administration. The White House demanded that access to the latest Mythos 5 and Fable 5 models be closed to foreign nationals, effectively forcing the startup to withdraw them from the market.
The Paradox of Regulatory Restrictions
Despite such stringent regulatory measures, corporate clients have not turned away from Anthropic. On the contrary, they continue to actively use the available models, demonstrating high loyalty and trust in the technology. This indicates that the quality of Anthropic's solutions, especially in the Claude segment, outweighs the risks associated with political instability.
While OpenAI appears to be stagnating, offering no compelling arguments for the market to switch, Anthropic is steadily increasing its share. If this trend continues, we will witness a change in leadership in the corporate AI assistant race. From my perspective, the key factor here is not so much marketing, but the real-world utility of the models for businesses, which Anthropic has managed to prove in practice.