Anthropic-Only Businesses Jump from 4.5% to 23.1% in a Year, Overtaking OpenAI — Ramp Data
FinanceYF5 · x · 2026-10-27
FinanceYF5 cites Ramp AI Index data revealing a dramatic shift in enterprise model vendor share:
- Jan–Aug 2025: 60.6% of businesses bought only OpenAI; only 4.5% bought only Anthropic
- A year later: Anthropic-only rose to 23.1%, surpassing OpenAI-only at 19.2%
- Big buyers hedge: in May, the top 10% of firms by per-employee AI spend used a median of 5 vendors; the top 1% used 8; median firms used 2
Takeaway: Anthropic grew in a market where enterprises keep multiple vendors and vendor lock-in barely exists.
Related event: Anthropic overtakes OpenAI in enterprise paid adoption per Ramp AI Index(5 posts)→
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