OpenAI

#2 in Foundational LLMs

Illustrative figures · not market data

As of Sep 2026.

Adoption rate

40%

+0.4 pts vs Aug

Share of businesses buying in this category that buy from this vendor.

Growth rate

+0.4 pts

+0.3 pts in Aug

Change in adoption since the previous month, in percentage points.

New adopter rate

21%

−1.0 pts vs Aug

Share of this vendor's customers who first bought in the last 12 months.

Switch rate

0.0 pts vs Aug

Share of this vendor's customers who came from a competitor in the category.

Adoption over time

Adoption by company size

Among businesses of each size buying in the category.

1–10 employees40%
11–50 employees40%
51–250 employees40%

Alternatives

Other vendors in Foundational LLMs, by adoption.

Prototype · data note

Illustrative figures — vendor names are real, every number is invented, and none of it is market data. In production these rates would come from FEB clients’ bill-pay, ACH, and card payments, aggregated so no single client can be identified. Whether FEB may use client payment data this way is an open decision for compliance and counsel.