runsonwhat

Companies that use OpenAI

30,958 companies use OpenAI, as of October 2026.

OpenAI: LLM APIs / ChatGPT Enterprise. We've found 30,958 companies using OpenAI, most often in IT Services (18%) and Software (16%), typically with 11–50 employees and 48% based in United States.

Customers30,958companies use it
Most popular with1,001–5,000 employees2.6× more likely than average
New customers+17started in the last 30 days
  1. GitHubgithub.com
    Seen Oct 2026
  2. DigiCertdigicert.comComputer & Network Security · United States
    1,001–5,000 employeesSeen Oct 2026
  3. Zendeskzendesk.comSoftware · United States
    1,001–5,000 employeesSeen Oct 2026
  4. Datadogdatadoghq.comIT Performance Management · United States
    Seen Oct 2026
  5. LaunchDarklylaunchdarkly.comUnited States
    Seen Oct 2026
  6. Cloudinarycloudinary.comIsrael
    Seen Oct 2026
  7. RevenueCatrevenuecat.comEngineering, Product and Design · United States
    51–200 employeesSeen Oct 2026
  8. Sendbirdsendbird.comEngineering, Product and Design · United States
    201–1,000 employeesSeen Oct 2026
  9. Splashtop Inc.splashtop.comUnited States
    Seen Oct 2026
  10. Zapier Inczapier.comCloud Computing · United States
    201–1,000 employeesSeen Oct 2026
  11. Egnyteegnyte.comTechnology · United States
    Seen Oct 2026
  12. Pipedrivepipedrive.comSoftware As a Service · United States
    201–1,000 employeesSeen Oct 2026
  13. AgenticAssureagenticassure.aiSingapore
    Seen Oct 2026
  14. Aytmaytm.comMarket Research · United States
    51–200 employeesSeen Oct 2026
  15. Basedashbasedash.comAnalytics · Canada
    1–10 employeesSeen Oct 2026
  16. BigIDbigid.comSoftware · Israel
    Seen Oct 2026
  17. CoLabcolabsoftware.comEngineering, Product and Design · Canada
    51–200 employeesSeen Oct 2026
  18. Content Snarecontentsnare.comAustralia
    Seen Oct 2026
  19. Credalcredal.aiProductivity · United States
    11–50 employeesSeen Oct 2026
  20. CybelAngelcybelangel.comComputer & Network Security · France
    51–200 employeesSeen Oct 2026

Showing 40 of 30,958

OpenAI customers also use

How much more likely OpenAI customers are to use each tool than the average company.

What kind of companies use OpenAI

Segments where OpenAI customers are more common than among all the companies we track.

  • 1,001–5,000 employees7% of customers2.6×more likely
  • Software10% of customers2.1×more likely
  • 201–1,000 employees19% of customers1.8×more likely

OpenAI customers by industry

  1. IT Services18%
  2. Software16%
  3. Financial Services9%
  4. Marketing and Advertising8%
  5. Internet6%
  6. Management Consulting5%
  7. Real Estate4%
  8. Retail4%

OpenAI customers by company size

  1. 1–10 employees3%
  2. 11–50 employees39%
  3. 51–200 employees28%
  4. 201–1,000 employees19%
  5. 1,001–5,000 employees7%
  6. 5,001–10,000 employees1%
  7. 10,000+ employees2%

OpenAI customers by country

  1. United States48%
  2. United Kingdom7%
  3. Germany6%
  4. Canada4%
  5. Australia4%
  6. Spain3%
  7. Netherlands3%
  8. India3%

Breakdowns cover the 28,755 customers with company details so far.

Alternatives to OpenAI

Other tools in the same category, by how many companies use them.

OpenAI FAQ

How many companies use OpenAI?

As of October 2026, 30,958 companies show public evidence of using OpenAI across the 1,789,069 company domains runsonwhat tracks. That makes OpenAI the second most used of the 52 AI tools with confirmed customers, behind Anthropic (57,786). The number is a lower bound: a company counts only when a public record, such as a DNS entry or OpenAI's code on its website, shows the tool in use.

Which companies use OpenAI?

Companies that use OpenAI include GitHub, DigiCert, Zendesk, Datadog and LaunchDarkly, according to runsonwhat's public-record scans (October 2026). The biggest industries among OpenAI customers are IT services (18%) and software (16%). The full list of 30,958 companies can be filtered by industry, company size and country on runsonwhat's OpenAI page.

What industries use OpenAI the most?

The industries with the most OpenAI customers are IT services (18%), software (16%) and financial services (8.7%), based on the 16,246 companies with a known industry. Relative to all companies runsonwhat tracks, OpenAI stands out most in software (2.1× the average rate).

Is OpenAI more popular with startups or large companies?

OpenAI is used mostly by mid-size companies: of the 25,111 companies with a known size, 42% have up to 50 employees, 48% have 51 to 1,000 and 11% have more than 1,000. Compared with all companies runsonwhat tracks, OpenAI is 2.6× as common among companies with 1,001–5,000 employees.

Which countries use OpenAI the most?

Most OpenAI customers runsonwhat has found are based in the United States (48%), the United Kingdom (7.2%) and Germany (6.4%), out of 24,251 companies with a known country. Outside the United States, the biggest markets are the United Kingdom and Germany.

Is OpenAI gaining or losing customers?

In the 90 days to October 2026, 17 companies started using OpenAI and 4 companies stopped, a net gain of 13. runsonwhat counts a start or a stop only between two checks of the same company done the same way, so a change in how a site is scanned never shows up as churn.

OpenAI vs Anthropic: which is more widely used?

Anthropic is more widely used: 57,786 companies show public evidence of Anthropic, against 30,958 for OpenAI (1.9× as many), according to runsonwhat (October 2026). 13,779 companies run both, which is 45% of OpenAI's customers.

What are the most popular alternatives to OpenAI?

By the number of companies using them, the most used AI tools other than OpenAI are Anthropic (57,786), Perplexity (1,288), Chatbase (1,208) and TollBit (956), according to runsonwhat (October 2026). Not every tool in a category does the same job, so check each one's page; runsonwhat ranks all AI tools at https://www.runsonwhat.com/tools/ai-tools.

What other tools do OpenAI customers use?

OpenAI customers use Zapier, Cursor and Notion far more often than the average company. For example, 3.3% of OpenAI customers also run Zapier, 15× the rate among all companies runsonwhat tracks, and 9.3% run Cursor.

How does runsonwhat know a company uses OpenAI?

runsonwhat reads public records only. For OpenAI, that means a domain-verification record for OpenAI in the company's DNS or OpenAI on the company's own subprocessor list. A company is listed only when one of these direct records is present, and each match keeps the record it came from. DNS is rechecked weekly and websites about monthly.