# What does 21YunBox use?

21YunBox (21cloudbox.com) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-10-23).

- Industry: Internet
- Size: 11–50 employees
- Based in: China
- LinkedIn: https://www.linkedin.com/company/21yunbox

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records |  |
| [Astro](https://www.runsonwhat.com/reverse/astro) | Frontend | Website code |  |

## FAQ

### What tools does 21YunBox use?

As of October 2026, runsonwhat has found 7 tools at 21YunBox (21cloudbox.com) in public records. Edge & Hosting: Vercel. Application: jQuery, YouTube and OpenAI. Last checked October 23, 2026.

### What cloud does 21YunBox run on?

21YunBox uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a subdomain that points at Vercel and code on 21cloudbox.com. Vercel is used by 49,551 companies runsonwhat tracks.

### Does 21YunBox use jQuery?

Yes. runsonwhat found jQuery at 21YunBox through jQuery code on 21cloudbox.com. jQuery is a Frontend tool used by 922,857 companies runsonwhat tracks.

### Does 21YunBox use AI tools?

Yes. runsonwhat has found OpenAI at 21YunBox; OpenAI, for example, through a DNS verification record for OpenAI. AI services called only from servers leave no public trace, so 21YunBox may use more AI tools than these.

### How does runsonwhat know what 21YunBox uses?

runsonwhat reads public records only. Of the 7 tools at 21YunBox, 3 were found through code on 21cloudbox.com, 2 through DNS records, 1 through website configuration files and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and 21cloudbox.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/21cloudbox.com (updated October 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.