# Cohere vs OpenAI API: who uses which

On usedby, 23 companies use Cohere and 5 use OpenAI API. No company is listed with both yet. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-07: 25 of 28 public lines checked.

## Side by side

|  | [Cohere](https://www.usedby.ai/tools/cohere.md) | [OpenAI API](https://www.usedby.ai/tools/openai-api.md) |
|---|---|---|
| Public customers | 23 | 5 |
| Confirmed | 8 | 3 |
| Observed | 15 | 1 |
| Signals (job posts) | 0 | 1 |
| Top industries of customers | IT Services & System Integration (9), DevTools & Infrastructure (3), Banking & Mortgages (2) | Biotech & Pharma (1), DevTools & Infrastructure (1), Marketing Tech (1) |
| Category | Foundation Models (LLMs) | Foundation Models (LLMs) |
| Security | ISO 42001 ([trustcenter.cohere.com](https://trustcenter.cohere.com/), checked 2026-10-07) | — |
| Data residency | US ([trustcenter.cohere.com](https://trustcenter.cohere.com/), checked 2026-10-07) | — |
| Data processing terms | A data processing agreement is available. ([trustcenter.cohere.com](https://trustcenter.cohere.com/), checked 2026-10-07) | — |
| Free trial | Free trial or free plan available. ([cohere.com](https://cohere.com/pricing), checked 2026-10-07) | — |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Cohere: [Fujitsu](https://www.usedby.ai/case-studies/how-fujitsu-uses-cohere-ba861d8c.md): story without a checked figure. (captured by usedby 2026-10-02)

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