# Who uses OpenAI API?

5 companies use OpenAI API on usedby: 3 confirmed, 1 observed and 1 signal. 20% of them are in Biotech & Pharma. Confirmed or observed customers include Amgen, Pendo and Chip Ganassi Racing. Latest check 2026-10-07: 4 of 5 companies checked, from 3 public sources.

> APIs for GPT, DALL-E, and more

- Category: [Foundation Models (LLMs)](https://www.usedby.ai/tools/category/foundation-models-llms.md)
- Website: [platform.openai.com](https://platform.openai.com)

## Customers

Every line is a customer, at one of three proof levels: confirmed (a case study, a named quote or a press release), observed (the vendor shows the company on its own pages) or signal (a job post shows the company's employees use the tool, the weakest proof). The first public proof is the first public page we found, not an adoption date.

| Company | Industry | Proof | First public proof | Source |
|---|---|---|---|---|
| [Amgen](https://www.usedby.ai/companies/amgen.md) | Biotech & Pharma | Confirmed | — | [openai.com](https://openai.com/stories/), captured 2026-10-05 |
| [Match Group](https://www.usedby.ai/companies/match-group.md) | Streaming & Content | Signal | Job post, November 2024 | [jobs.lever.co](https://jobs.lever.co/matchgroup/849c888a-0348-4794-9c8d-5e4da7e76b2d), captured 2026-10-07 |
| [Pendo](https://www.usedby.ai/companies/pendo.md) | Marketing Tech | Observed | — | [platform.openai.com](https://platform.openai.com/customers) |
| [Chip Ganassi Racing](https://www.usedby.ai/companies/chip-ganassi-racing.md) | Sports & Fitness | Confirmed | — | [openai.com](https://openai.com/stories/), captured 2026-10-05 |
| [Cursor](https://www.usedby.ai/companies/cursor.md) | DevTools & Infrastructure | Confirmed | — | [openai.com](https://openai.com/stories/), captured 2026-10-05 |

## Before you buy

usedby has not verified OpenAI API’s pricing, security or data terms yet.

## Alternatives

- [Claude](https://www.usedby.ai/tools/claude.md): 73 public customers. Compare: https://www.usedby.ai/compare/claude-vs-openai-api.md
- [Cohere](https://www.usedby.ai/tools/cohere.md): 23 public customers. Compare: https://www.usedby.ai/compare/cohere-vs-openai-api.md
- [Gemini](https://www.usedby.ai/tools/gemini.md): 2 public customers. Compare: https://www.usedby.ai/compare/gemini-vs-openai-api.md

More: https://www.usedby.ai/alternatives/openai-api.md

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Source: https://www.usedby.ai/tools/openai-api · How we check: https://www.usedby.ai/methodology