# What does ChatGPT use?

ChatGPT (chatgpt.com) shows public evidence of 6 tools, according to runsonwhat (last checked 2026-11-13).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Email records, DNS records, Website code |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS verification records, Custom domain |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [dmarcian](https://www.runsonwhat.com/reverse/dmarcian) | Security & Compliance | Email records |  |
| [Bugcrowd](https://www.runsonwhat.com/reverse/bugcrowd) | Security & Compliance | Website config |  |

## FAQ

### What tools does ChatGPT use?

As of November 2026, runsonwhat has found 6 tools at ChatGPT (chatgpt.com) in public records. Edge & Hosting: Cloudflare and Vercel. Data & Observability: web-vitals. Company Ops: dmarcian and Bugcrowd. Last checked November 13, 2026.

### What cloud does ChatGPT run on?

ChatGPT uses Vercel for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Vercel through a DNS verification record for Vercel and a subdomain. Vercel is used by 53,693 companies runsonwhat tracks.

### What monitoring tools does ChatGPT use?

ChatGPT uses web-vitals for monitoring, according to runsonwhat (November 2026). runsonwhat found web-vitals through web-vitals code on chatgpt.com. web-vitals is used by 29,905 companies runsonwhat tracks.

### Does ChatGPT use Cloudflare?

Yes. runsonwhat found Cloudflare at ChatGPT through email records that authorize Cloudflare and DNS records. Cloudflare is a CDN & Edge tool used by 736,361 companies runsonwhat tracks.

### Which companies have a tech stack similar to ChatGPT's?

The companies with the stacks most like ChatGPT's are RacingJunk, Windows Central, 12th Street Dental Office and QxMD, according to runsonwhat (November 2026). Each shares 2 to 4 tools with ChatGPT, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what ChatGPT uses?

runsonwhat reads public records only. Of the 6 tools at ChatGPT, 2 were found through DNS records, 2 through email records, 1 through code on chatgpt.com and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and chatgpt.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/chatgpt.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.