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Claude VS OpenAI_

As of 4 November 2026, OpenAI is named by 3,389 companies and Claude by 8,753; Claude skews to companies under 200 people (51% vs 48%), OpenAI to companies over 1,000 (26% vs 20%).

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

The website-and-DNS footprint is not comparable between a marketing suite and a CRM: Claude's script and mail records show on hundreds of thousands of small sites, OpenAI rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.

Claude: 2–200 employees
51%
OpenAI: 2–200 employees
48%
Claude: 1,000+ employees
20%
OpenAI: 1,000+ employees
26%
Postings per company, 90 days
2.7 · 2.9
Website or DNS footprint
0 · 110,707
8,753companies name Claude
3,389companies name OpenAI
1,382name both
23,652 · 9,670postings in 90 days, Claude · OpenAI
02 — Side by side

Who chooses which

Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.

By company size
SegmentClaudeshareOpenAIshareLeans
Self-employed3364%1886%even
2-10 employees90110%46914%OpenAI
11-50 employees1,48617%55616%even
51-200 employees2,10624%60418%Claude
201-500 employees1,28015%38611%Claude
501-1000 employees85810%2989%even
1001-5000 employees1,00411%44913%even
5001-10000 employees2563%1264%even
10,001+ employees5266%3139%OpenAI
By industry
SegmentClaudeshareOpenAIshareLeans
Technology & software3,81144%1,78053%OpenAI
Business & finance services2,16025%77023%even
Manufacturing & industry6127%1996%even
Media & content3924%1394%even
Commerce & trade3724%913%even
Consumer services & leisure3344%1023%even
Property & construction2122%471%even
Public, community & associations1882%622%even
Health care1862%441%even
Utilities & infrastructure1602%562%even
Hospitality & travel1261%331%even
Transport, logistics & rental1221%351%even
By country
SegmentClaudeshareOpenAIshareLeans
United States5,20459%1,99459%even
Germany6377%1765%Claude
United Kingdom6147%2227%even
France2213%752%even
Canada2193%883%even
India1872%1364%even
Brazil1512%431%even
Netherlands1191%532%even
Australia1181%501%even
Spain1011%431%even
Sweden781%321%even
Austria601%––outside top 12
Poland––321%outside top 12
Postings by team (share of each tool's postings)
SegmentClaudeshareOpenAIshareLeans
Software engineering5,60220%3,54029%OpenAI
Data & AI4,28315%4,87139%OpenAI
Marketing & communications2,6019%1992%Claude
IT operations & business systems1,7596%6705%even
Sales1,7556%3313%Claude
Product, program & project management1,6256%3353%Claude
Finance & accounting1,2714%530%Claude
Design & UX8873%570%Claude
Engineering (non-software)6562%1291%even
Customer service & success5782%1081%even
Business development & strategy5012%921%even
Human resources4912%340%even
General management & consulting4862%1741%even
Administration & office4191%70%even
Legal, compliance & risk4171%440%even
Education & training1671%260%even
arts media and entertainment1431%190%even
Quality, safety & environment1220%180%even
logistics warehouse and transport1090%100%even
procurement and purchasing930%120%even
Unclassified910%440%even
research and science650%100%even
construction and civil510%210%even
Travel, leisure & events410%90%even
real estate and property370%––outside top 12
manufacturing and production320%60%even
skilled trades and field service280%50%even
facilities cleaning and security270%30%even
healthcare clinical220%20%even
hospitality and food service170%––outside top 12
public safety and protective services––30%outside top 12
Retail & store operations––30%outside top 12
Go deeper

The companies behind each column

Companies using Claude →
Companies using OpenAI →
LLM models & APIs ranked →

Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

OpenAI is named by 3,389 companies in job postings and Claude by 8,753; 1,382 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/claude-vs-openai)
How we know

Read from the source, not self-reported

Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →

  • Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
  • Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
  • SegmentsCountry, size and industry from the company profile built from its website.
  • Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
FAQ

Claude vs OpenAI: questions

Which is more used, Claude or OpenAI?

By companies naming it in their own job postings, Claude (8,753) over OpenAI (3,389). By website-and-DNS footprint, OpenAI (110,707 vs 0), because its scripts and mail records sit on many small company sites.

Who chooses Claude?

51% of Claude companies have 2 to 200 employees, against 48% for OpenAI. 20% of Claude companies have over 1,000 employees, against 26% for OpenAI.

Do companies run both?

1,382 companies name both in their postings, usually Claude in marketing and OpenAI in sales, or during a migration.

Where do these numbers come from?

From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.

Companies and people

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