OpenAI API vs Runware: who uses which
Customers, public proof and the companies that use both.
On usedby, 45 companies use OpenAI API and 20 use Runware. 1 company uses both, including Wix. OpenAI API leads among the Marketplace companies on usedby that use either tool, Runware among the Artificial Intelligence companies.Latest check Nov 12, 2026: 64 of 65 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses OpenAI API, Runware, or both
Every company with a public proof for at least one of the two tools.
44
listed for OpenAI API only
1
company uses both
19
listed for Runware only
On usedby, 44 companies are listed for OpenAI API only, 19 are listed for Runware only and 1 uses both, out of the 64 companies listed for at least one. An absent listing does not prove non-use.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, OpenAI API |
|---|---|
 Wix | On or before Oct 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use OpenAI API, Runware or both: a share of the companies on usedby, not of the market.
Listed for OpenAI API onlyBothListed for Runware only
More common with OpenAI API
- Marketplace4 of the 6 Marketplace companies on usedby that use either tool use OpenAI API.
- DevTools & Infrastructure5 of the 5 DevTools & Infrastructure companies on usedby that use either tool use OpenAI API, 1 of them alongside Runware.
More common with Runware
- Artificial Intelligence12 of the 22 Artificial Intelligence companies on usedby that use either tool use Runware.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: OpenAI API, 2 of 4; Runware, 0 of 4. Missing facts remain unverified, not absent features.
OpenAI APIRunwareWhat customers report
Results as the vendor or the customer published them, with the source and the date.
OpenAI API
No reviewed story for OpenAI API yet.
Runware
by 11pm—just four hours after first contact—they were live and running production traffic
Higgsfield
Vendor case study, runware.ai, captured Nov 12, 2026
Overall cost per image dropped by over 50%, which changed how the team approached product development.
HeyGen
Vendor case study, runware.ai, captured Nov 12, 2026
Questions about OpenAI API and Runware
Which is used more, OpenAI API or Runware?
OpenAI API has more customers on usedby: 45 against 20 for Runware. OpenAI API leads among the Marketplace companies on usedby that use either tool, Runware among the Artificial Intelligence companies.
Do companies use both OpenAI API and Runware?
Yes. 1 company uses both on usedby, including Wix.
Who uses OpenAI API?
45 companies on usedby, each with the public page that shows it. See who uses OpenAI API.
Who uses Runware?
20 companies on usedby, each with the public page that shows it. See who uses Runware.
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 four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.