Ramp AI Index: 50% Adoption Milestone + Anthropic Closing OpenAI Gap

Ramp's April 2026 AI Index (based on corporate card and invoice payments across Ramp's user base) crossed two major thresholds. First: 50.4% of businesses now pay for AI services — the first time adoption has crossed the 50% threshold. Up from 35% one year prior (+15.4 percentage points YoY). Second: Anthropic grew from 24.4% to 30.6% share of businesses, setting a record single-month gain, while OpenAI holds 35.2% — meaning the gap between them narrowed from 11 points to 4.6. Anthropic is projected to surpass OpenAI in market share within two months. Funding status is the strongest adoption predictor: VC-backed companies at 80% adoption vs. 45% for all others. Anthropic leads in tech (63%), finance (52%), and professional services (47%) — the three highest-adoption sectors.

For performance marketers and growth operators: the 50% threshold is a genuine market structure change, not a growth-rate story. Half of all businesses paying for AI means AI tool vendors now have large, addressable markets rather than early-adopter niches. The VC-backed 80% adoption stat directly profiles Seva's buyer profile. Anthropic's trajectory in finance + professional services shows the enterprise buyer (not just devs) is adopting Claude. Content citing this data will resonate with operators benchmarking their own adoption vs. peers.

• "50% of businesses now pay for AI. The other 50% is your competitor's advantage."
• "Ramp data: VC-backed companies are at 80% AI adoption. If you're not, you're the outlier."
• "Anthropic is about to surpass OpenAI in enterprise adoption — here's what that means for your stack"
• "The Ramp AI Index: the single most useful data set for benchmarking your AI stack against peers"