Who uses OpenAI API?
APIs for GPT, DALL-E, and more platform.openai.com
5
companies use OpenAI API
5 companies use OpenAI API. 20% are in Biotech & Pharma. Confirmed or observed customers include Amgen, Pendo, and Chip Ganassi Racing. 3 of them are confirmed by a published case study, quote or press release.Latest check Oct 7, 2026: 4 of 5 companies checked, from 3 public sources.
- Category
- Foundation Models (LLMs)
- Customers by proof
- 3 confirmed, 1 observed, 1 signal
- Top industry
- Biotech & Pharma, 20% of customers
- Most similar
- Claude, 2 shared customers
- Website
- platform.openai.com
What OpenAI API does
OpenAI API provides access to powerful AI models including GPT-4, DALL-E, and Whisper. Developers use these APIs to build applications with text generation, image creation, and speech capabilities.
Written by usedby from platform.openai.com.
Main features
Common uses
5 companies use OpenAI API
Every company below links to the public page that shows it uses OpenAI API. Open a row to see the dated capture.
Customers over time: appears once we have six months of archived captures.
| Company | Industry | First public proof | Proof |
|---|---|---|---|
 Amgen | Biotech & Pharma | — | |
 Match Group | Streaming & Content | Job post, Nov 2024 | |
 Pendo | Marketing Tech | — | |
 Chip Ganassi Racing | Sports & Fitness | — | |
 Cursor | DevTools & Infrastructure | — |
What customers report
Results as published by OpenAI API and its customers. Each one links to its dated source. We quote, we do not score.
Before you buy OpenAI API
What OpenAI API publishes on the points buyers check first, each with its source and check date.
Questions to ask in your demo
- Which of your customers look like us, by industry and size?
- What does a pilot cost, and what decides the move to a full contract?
- Where is our data stored, who can access it, and is it used to train models?
- How does OpenAI API work with the tools we already use?
OpenAI API alternatives
Tools compared with OpenAI API most often, with the customers they share.
| Tool | Customers | Shared with OpenAI API | Compare |
|---|---|---|---|
 Claude73 customers, 2 shared | 73 | 2 | OpenAI API vs Claude |
 Cohere23 customers, 0 shared | 23 | 0 | OpenAI API vs Cohere |
 Gemini2 customers, 0 shared | 2 | 0 | OpenAI API vs Gemini |
Questions about OpenAI API
Who uses OpenAI API?
5 companies use OpenAI API, including Amgen, Pendo, and Chip Ganassi Racing.
Which industries use OpenAI API?
The industries with the most OpenAI API customers are Biotech & Pharma (1), DevTools & Infrastructure (1), and Marketing Tech (1).
What are the alternatives to OpenAI API?
The tools compared with OpenAI API most often are Claude (73 customers, 2 shared), Cohere (23 customers, 0 shared), and Gemini (2 customers, 0 shared). See all OpenAI API alternatives.
How does usedby know who uses OpenAI API?
Each company is linked to a public page that names it: OpenAI API's customer page, a published case study, a press release or a job post. We save each page with a dated capture and check it again on each run. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
What do confirmed, observed and signal mean?
Confirmed (3): a case study, a named quote or a press release. Observed (1): OpenAI API shows the company on its own pages, for example a logo wall. Signal (1): a job post shows the company’s employees use OpenAI API, the weakest proof. Every level counts as a customer, and each line shows its level.
How current is this list?
The most recent check was on October 7, 2026, and 4 of 5 companies on this list have been checked so far. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
Changes and sources
New customers
We have not started tracking changes for this tool yet.