# Azure OpenAI vs Claude: who uses which

On usedby, 3 companies use Azure OpenAI and 184 use Claude. 1 company uses both, including Harvey. 1 of them is known through a job post (the weakest proof) on at least one side. Counts include every proof level, job-post signals included; each company keeps its proof level on each side. Latest check 2026-11-15: 161 of 187 public lines checked.

## Side by side

|  | [Azure OpenAI](https://www.usedby.ai/tools/azure-openai.md) | [Claude](https://www.usedby.ai/tools/claude.md) |
|---|---|---|
| Public customers | 3 | 184 |
| Confirmed | 0 | 96 |
| Observed | 0 | 37 |
| Signals (job posts) | 1 | 50 |
| Top industries of customers (every proof level) | Artificial Intelligence (2), Legal & Compliance (1) | Artificial Intelligence (28), DevTools & Infrastructure (28), Fintech & Payments (19) |
| Category | Foundation models & model APIs | AI assistants |
| Security | — | SOC 2 Type II, ISO 27001, ISO 42001, HIPAA, FedRAMP, Cyber Essentials ([trust.anthropic.com](https://trust.anthropic.com/), checked 2026-11-13) |
| Your data | — | Consumer inputs and outputs · Training can be disabled in account settings. Safety-flagged conversations and material explicitly reported as feedback are exceptions. ([anthropic.com](https://www.anthropic.com/legal/privacy), checked 2026-11-13) |
| Data processing terms | — | A data processing agreement is available. ([trust.anthropic.com](https://trust.anthropic.com/), checked 2026-11-13) |
| Free trial | — | Free trial or free plan available. ([claude.com](https://claude.com/pricing), checked 2026-10-26) |
| Integrations | — | Jira, Confluence, Bitbucket, Loom ([claude.com](https://claude.com/marketplace/connectors-plugins), checked 2026-10-26) |
| Pricing | — | Free: $0; Max: from $100 Per month ([claude.com](https://claude.com/pricing), checked 2026-10-26) |

## Companies that use both

Every proof level counts; the proof level of each side is shown, strongest proofs first. The first public proof is not an adoption date.

| Company | Proof, Azure OpenAI | Proof, Claude | First public proof, Azure OpenAI | First public proof, Claude |
|---|---|---|---|---|
| [Harvey](https://www.usedby.ai/companies/harvey.md) | Signal (job post) | Confirmed | Publication date unknown (job-post evidence) | On or before October 2026 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Claude: [Spellbook](https://www.usedby.ai/case-studies/spellbook-claude.md): **10x**: “Cuts the time to complete an agreement 10x, from roughly 10 hours of lawyer work to about one” (captured by usedby 2026-10-30)
- Claude: [Pictet](https://www.usedby.ai/case-studies/pictet-claude.md): **700 people**: “Gave around 700 people access to Claude Code and Claude Cowork to date” (captured by usedby 2026-10-30)

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