# Claude vs Microsoft Copilot: who uses which

On usedby, 90 companies use Claude and 4 use Microsoft Copilot. 1 company uses both, including 6sense. 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 2026-10-17: 66 of 94 public lines checked.

## Side by side

|  | [Claude](https://www.usedby.ai/tools/claude.md) | [Microsoft Copilot](https://www.usedby.ai/tools/microsoft-copilot.md) |
|---|---|---|
| Public customers | 90 | 4 |
| Confirmed | 5 | 0 |
| Observed | 46 | 0 |
| Signals (job posts) | 39 | 4 |
| Top industries of customers (every proof level) | DevTools & Infrastructure (11), Fintech & Payments (10), Artificial Intelligence (7) | Agency & Studio (1), Data & Analytics (1), Legal & Compliance (1) |
| Category | AI assistants | AI assistants |
| Security | SOC 2 Type II, ISO 27001, ISO 42001, HIPAA, FedRAMP, Cyber Essentials ([trust.anthropic.com](https://trust.anthropic.com/), checked 2026-10-04) | — |
| Data processing terms | A data processing agreement is available. ([trust.anthropic.com](https://trust.anthropic.com/), checked 2026-10-04) | — |

## 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, Claude | Proof, Microsoft Copilot | First public proof, Claude | First public proof, Microsoft Copilot |
|---|---|---|---|---|
| [6sense](https://www.usedby.ai/companies/6sense.md) | Signal (job post) | Signal (job post) | Job post, October 2026 | Job post, June 2026 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Claude: [Carvana](https://www.usedby.ai/case-studies/carvana-claude.md): **65%**: “Claude Tag reduced the time required to reach an answer by 65%” (captured by usedby 2026-10-12)
- Claude: [Figma](https://www.usedby.ai/case-studies/figma-claude.md): **five minutes**: “I prototyped a new product flow with Figma Make in five minutes.” (captured by usedby 2026-10-12)

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