Cohere vs OpenAI API: who uses which
Customers, public proof and the companies that use both.
On usedby, 23 companies use Cohere and 5 use OpenAI API. No company is listed with both yet. Cohere leads among the IT Services & System Integration companies on usedby that use either tool.Latest check Oct 7, 2026: 25 of 28 public lines checked. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side.
Who uses Cohere, OpenAI API, or both
Every company with a public proof for at least one of the two tools.
23
use only Cohere
0
companies use both
5
use only OpenAI API
23 companies use only Cohere, 5 use only OpenAI API and 0 use both, out of the 28 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 2, 2026.
Where it lands
Newest customers
We have not started tracking changes for OpenAI API yet.
Who uses both
Companies with a confirmed or observed line on both tools.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Cohere
OpenAI APIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Cohere
OpenAI API
No reviewed story for OpenAI API yet.
Questions about Cohere and OpenAI API
Which is used more, Cohere or OpenAI API?
Cohere has more customers on usedby: 23 against 5 for OpenAI API.
Do companies use both Cohere and OpenAI API?
usedby has not found a company with a confirmed or observed line on both Cohere and OpenAI API yet.
Who uses Cohere?
23 companies on usedby, each with the public page that shows it. See who uses Cohere.
Who uses OpenAI API?
5 companies on usedby, each with the public page that shows it. See who uses OpenAI API.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of three proof levels: confirmed, observed or signal (a job post, the weakest). A company is named as using both tools when its lines on both are confirmed or observed.