Claude overtakes OpenAI in U.S. B2B adoption
Ramp AI Index: Anthropic surpasses OpenAI in U.S. B2B adoption for the first time (34.4% vs 32.3%), having quadrupled its reach in 12 months
A year ago, the enterprise default was almost universally ChatGPT. Claude was well-regarded by engineers calling the API, but rarely appeared on procurement contracts or IT approval forms. The Ramp index is credible because it measures actual recurring payments by business customers — not signups or free-tier usage.
Vendor comparison decks can no longer skip Claude. Six months ago, 'just go with OpenAI' was a safe default; today that argument needs more support. That said, this shift reflects Claude's customer base broadening rather than OpenAI declining — many enterprises now run both. For individual users, ChatGPT still dominates awareness, so the day-to-day impact there is negligible.