# What does Claude use?

Claude (claudeusercontent.com) shows public evidence of 5 tools, according to runsonwhat (last checked 2026-11-07).

- LinkedIn: https://www.linkedin.com/company/anthropicresearch

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Segment](https://www.runsonwhat.com/reverse/segment) | Analytics | Website code |  |

## FAQ

### What tools does Claude use?

As of November 2026, runsonwhat has found 5 tools at Claude (claudeusercontent.com) in public records. Edge & Hosting: Cloudflare. Application: Next.js. Data & Observability: Segment. Last checked November 7, 2026.

### What analytics tools does Claude use?

Claude uses Segment for analytics, according to runsonwhat (November 2026). runsonwhat found Segment through Segment code on claudeusercontent.com. Segment is used by 6,793 companies runsonwhat tracks.

### Does Claude use Cloudflare?

Yes. runsonwhat found Cloudflare at Claude through DNS records that point at Cloudflare and code on claudeusercontent.com. Cloudflare is a CDN & Edge tool used by 734,513 companies runsonwhat tracks.

### How does runsonwhat know what Claude uses?

runsonwhat reads public records only. Of the 5 tools at Claude, 3 were found through code on claudeusercontent.com, 1 through DNS records and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and claudeusercontent.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/claudeusercontent.com (updated November 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.