# Companies that use OpenAI

As of October 2026, 31,126 companies show public evidence of using OpenAI (LLM APIs / ChatGPT Enterprise), according to runsonwhat.

- Tool: [OpenAI](https://openai.com), category [AI](https://www.runsonwhat.com/tools/ai-tools)
- Companies using it now: 31,126
- Stopped using it (seen on a same-method rescan): 9
- Started in the last 30 days: 94

## Who uses OpenAI

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

- 1,001–5,000 employees: 2.6× more likely (1,865 customers)
- Software: 2.1× more likely (2,652 customers)
- 201–1,000 employees: 1.8× more likely (4,877 customers)

## OpenAI customers by industry

| Industry | Share of customers |
|---|---|
| IT Services | 18% |
| Software | 16% |
| Financial Services | 8.7% |
| Marketing and Advertising | 8.4% |
| Internet | 5.7% |
| Management Consulting | 4.6% |
| Retail | 3.5% |
| Real Estate | 3.5% |

## OpenAI customers by company size

| Company size | Share of customers |
|---|---|
| 1–10 employees | 2.8% |
| 11–50 employees | 39% |
| 51–200 employees | 28% |
| 201–1,000 employees | 19% |
| 1,001–5,000 employees | 7.4% |
| 5,001–10,000 employees | 1.3% |
| 10,000+ employees | 2.0% |

## OpenAI customers by country

| Country | Share of customers |
|---|---|
| United States | 48% |
| United Kingdom | 7.2% |
| Germany | 6.5% |
| Canada | 4.3% |
| Australia | 3.8% |
| Spain | 3.2% |
| Netherlands | 2.7% |
| India | 2.6% |

## Alternatives to OpenAI

| Tool | Companies |
|---|---|
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | 58,250 |
| [Perplexity](https://www.runsonwhat.com/reverse/perplexity) | 1,294 |
| [Chatbase](https://www.runsonwhat.com/reverse/chatbase) | 1,285 |
| [TollBit](https://www.runsonwhat.com/reverse/tollbit) | 957 |
| [ElevenLabs](https://www.runsonwhat.com/reverse/elevenlabs) | 826 |
| [Mistral AI](https://www.runsonwhat.com/reverse/mistral) | 726 |
| [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) | 628 |
| [Langdock](https://www.runsonwhat.com/reverse/langdock) | 507 |
| [Voiceflow](https://www.runsonwhat.com/reverse/voiceflow) | 360 |
| [Azure Bot Service](https://www.runsonwhat.com/reverse/azure-bot-service) | 328 |

## OpenAI customers also use

- [Zapier](https://www.runsonwhat.com/reverse/zapier): 3.3% of OpenAI customers, 20× the average company
- [Cursor](https://www.runsonwhat.com/reverse/cursor): 9.3% of OpenAI customers, 20× the average company
- [Notion](https://www.runsonwhat.com/reverse/notion): 5.3% of OpenAI customers, 16× the average company
- [Jamf](https://www.runsonwhat.com/reverse/jamf): 6.6% of OpenAI customers, 14× the average company
- [Figma](https://www.runsonwhat.com/reverse/figma): 5.1% of OpenAI customers, 13× the average company
- [Slack](https://www.runsonwhat.com/reverse/slack): 8.4% of OpenAI customers, 13× the average company
- [Miro](https://www.runsonwhat.com/reverse/miro): 8.3% of OpenAI customers, 10× the average company
- [Anthropic](https://www.runsonwhat.com/reverse/anthropic): 45% of OpenAI customers, 9.8× the average company
- [Zoom](https://www.runsonwhat.com/reverse/zoom): 13% of OpenAI customers, 8.3× the average company
- [DocuSign](https://www.runsonwhat.com/reverse/docusign): 13% of OpenAI customers, 8.1× the average company

## Companies that use OpenAI (first 40 of 31,126)

| Company | Domain | Industry | Country |
|---|---|---|---|
| [GitHub](https://www.runsonwhat.com/company/github.com) | github.com |  |  |
| [DigiCert](https://www.runsonwhat.com/company/digicert.com) | digicert.com | Computer & Network Security | United States |
| [Zendesk](https://www.runsonwhat.com/company/zendesk.com) | zendesk.com | Software | United States |
| [Datadog](https://www.runsonwhat.com/company/datadoghq.com) | datadoghq.com | IT Performance Management | United States |
| [LaunchDarkly](https://www.runsonwhat.com/company/launchdarkly.com) | launchdarkly.com |  | United States |
| [Cloudinary](https://www.runsonwhat.com/company/cloudinary.com) | cloudinary.com |  | Israel |
| [RevenueCat](https://www.runsonwhat.com/company/revenuecat.com) | revenuecat.com | Engineering, Product and Design | United States |
| [Sendbird](https://www.runsonwhat.com/company/sendbird.com) | sendbird.com | Engineering, Product and Design | United States |
| [Splashtop Inc.](https://www.runsonwhat.com/company/splashtop.com) | splashtop.com |  | United States |
| [Zapier Inc](https://www.runsonwhat.com/company/zapier.com) | zapier.com | Cloud Computing | United States |
| [Egnyte](https://www.runsonwhat.com/company/egnyte.com) | egnyte.com | Technology | United States |
| [Pipedrive](https://www.runsonwhat.com/company/pipedrive.com) | pipedrive.com | Software As a Service | United States |
| [AgenticAssure](https://www.runsonwhat.com/company/agenticassure.ai) | agenticassure.ai |  | Singapore |
| [Aytm](https://www.runsonwhat.com/company/aytm.com) | aytm.com | Market Research | United States |
| [Basedash](https://www.runsonwhat.com/company/basedash.com) | basedash.com | Analytics | Canada |
| [BigID](https://www.runsonwhat.com/company/bigid.com) | bigid.com | Software | Israel |
| [CoLab](https://www.runsonwhat.com/company/colabsoftware.com) | colabsoftware.com | Engineering, Product and Design | Canada |
| [Content Snare](https://www.runsonwhat.com/company/contentsnare.com) | contentsnare.com |  | Australia |
| [Credal](https://www.runsonwhat.com/company/credal.ai) | credal.ai | Productivity | United States |
| [CybelAngel](https://www.runsonwhat.com/company/cybelangel.com) | cybelangel.com | Computer & Network Security | France |
| [Dailybot](https://www.runsonwhat.com/company/dailybot.com) | dailybot.com | Productivity | United States |
| [dynexo GmbH](https://www.runsonwhat.com/company/dynexo.de) | dynexo.de | IT Services | Germany |
| [Famly](https://www.runsonwhat.com/company/famly.co) | famly.co | Software | Denmark |
| [Getsleek](https://www.runsonwhat.com/company/getsleek.io) | getsleek.io |  |  |
| [Grata](https://www.runsonwhat.com/company/grata.com) | grata.com | Software | United States |
| [Hypatos GmbH](https://www.runsonwhat.com/company/hypatos.ai) | hypatos.ai | Software | Germany |
| [HYPD](https://www.runsonwhat.com/company/hypd.ai) | hypd.ai | Marketing and Advertising | Germany |
| [Kowalah](https://www.runsonwhat.com/company/kowalah.com) | kowalah.com | Information Technology Consulting | United Kingdom |
| [LemonLime AI Inc.](https://www.runsonwhat.com/company/lemonlime.com) | lemonlime.com | B2B | United States |
| [Lunio](https://www.runsonwhat.com/company/lunio.ai) | lunio.ai | Software | United Kingdom |
| [Maxio, LLC](https://www.runsonwhat.com/company/maxio.com) | maxio.com | Software | United States |
| [Midpage](https://www.runsonwhat.com/company/midpage.ai) | midpage.ai |  |  |
| [Mnemom](https://www.runsonwhat.com/company/mnemom.ai) | mnemom.ai |  |  |
| [Modern Treasury](https://www.runsonwhat.com/company/moderntreasury.com) | moderntreasury.com | Finance and Accounting | United States |
| [Ofelia](https://www.runsonwhat.com/company/ofelia.com) | ofelia.com | Publishing of Application Software | France |
| [OneSchema](https://www.runsonwhat.com/company/oneschema.co) | oneschema.co | Operations | United States |
| [Openlayer](https://www.runsonwhat.com/company/openlayer.com) | openlayer.com | Engineering, Product and Design | United States |
| [Oversight](https://www.runsonwhat.com/company/oversight.com) | oversight.com |  | United States |
| [Perceptyx](https://www.runsonwhat.com/company/perceptyx.com) | perceptyx.com | Software | United States |
| [Respond.io](https://www.runsonwhat.com/company/respond.io) | respond.io | IT Services | Malaysia |

The full list is on https://www.runsonwhat.com/reverse/openai for signed-in users.

## FAQ

### How many companies use OpenAI?

As of October 2026, 31,126 companies show public evidence of using OpenAI across the 1,791,213 company domains runsonwhat tracks. That makes OpenAI the second most used of the 52 AI tools with confirmed customers, behind Anthropic (58,346). 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 31,126 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 16,305 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 25,184 companies with a known size, 42% have up to 50 employees, 47% 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 (6.5%), out of 24,315 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, 119 companies started using OpenAI and 10 companies stopped, a net gain of 109. 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: 58,346 companies show public evidence of Anthropic, against 31,126 for OpenAI (1.9× as many), according to runsonwhat (October 2026). 13,911 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 (58,346), Perplexity (1,295), Chatbase (1,288) and TollBit (957), 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, 20× 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.


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Source: runsonwhat, https://www.runsonwhat.com/reverse/openai (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.