According to Ramp Economics Lab (50,000+ companies), the balance of power in the corporate sector has flipped over the year. In February 2025, ChatGPT held about 90% of the AI chat subscription market. By February 2026, Claude's share had risen to approximately 70%.
The growth is evident across all plans - Claude Team, Claude Max, Claude Enterprise. Anthropic's bet on coding and agents has clearly paid off. Interestingly, both ChatGPT Business and ChatGPT Plus are shrinking simultaneously - companies are transitioning to Claude not from a single plan, but en masse.
Source - Ramp, a corporate finance platform through which actual company payments are processed. This is not a survey or self-reporting, but actual transaction data.
