runsonwhat

ChatGPT's tech stack

What does ChatGPT use?

ChatGPT (chatgpt.com) uses at least 6 tools we can see from public records, including Vercel for hosting, web-vitals for monitoring, Cloudflare for content delivery and dmarcian for security. Last checked .

Re-check liveVisit chatgpt.com
Tools found
6
Categories
5
Layers
4 of 5
Last checked
Oct 2026

ChatGPT's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

2 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Data & Observability

1 tool, what they measure and store

Monitoring

Go-to-market

1 tool, how they find and keep customers

Marketing

Company Ops

2 tools, what the team runs on day to day

Security & Compliance

Companies like ChatGPT also use

Tools common among companies with a similar stack that we haven't found at ChatGPT.

Companies with a stack like ChatGPT's

Ranked by shared tools, with rare tools counting more.

ChatGPT tech stack FAQ

What tools does ChatGPT use?

As of October 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 October 7, 2026.

What cloud does ChatGPT run on?

ChatGPT uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a subdomain that points at Vercel and a DNS verification record. Vercel is used by 46,123 companies runsonwhat tracks.

What monitoring tools does ChatGPT use?

ChatGPT uses web-vitals for monitoring, according to runsonwhat (October 2026). runsonwhat found web-vitals through web-vitals code on chatgpt.com. web-vitals is used by 25,652 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 689,793 companies runsonwhat tracks.

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

The companies with the stacks most like ChatGPT's are Nebraska Equine Veterinary Clinic, RacingJunk, SurveyMonkey and FIS Global, according to runsonwhat (October 2026). Each shares 1 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 email records, 1 through DNS records, 1 through subdomains that point at the vendor, 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.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.