AI AI adoption is now flat across US businesses, index finds The Ramp index says paying customers have stopped flocking to the big AI providers. But that isn't necessarily the end of a bubble. Phillip de Wet Dec 15, 2025 - 2 min read Photo by Stefan Meier on Unsplash Get the full story: Subscribe for free Join peers managing over $100 billion in annual IT spend and subscribe to unlock full access to The Stack’s analysis and events. Subscribe now Already a member? Sign in