# What does Chai use?

Chai (chaijs.com) shows public evidence of 10 tools, according to runsonwhat (last checked 2026-11-01).

## Edge & Hosting

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

## Application

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

## Data & Observability

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

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |
| [Fastmail](https://www.runsonwhat.com/reverse/fastmail) | Workspace | Email records |  |

## FAQ

### What tools does Chai use?

As of November 2026, runsonwhat has found 10 tools at Chai (chaijs.com) in public records. Edge & Hosting: Cloudflare and Fastly. Application: jQuery. Data & Observability: Google Analytics. Company Ops: Let's Encrypt, Sectigo and DigiCert. Last checked November 1, 2026.

### What email provider does Chai use?

Chai uses Fastmail for email and office software, according to runsonwhat (November 2026). runsonwhat found Fastmail through email records that authorize Fastmail. Fastmail is used by 1,219 companies runsonwhat tracks.

### What analytics tools does Chai use?

Chai uses Google Analytics for analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on chaijs.com. Google Analytics is used by 905,960 companies runsonwhat tracks.

### Does Chai use jQuery?

Yes. runsonwhat found jQuery at Chai through jQuery code on chaijs.com. jQuery is a Frontend tool used by 929,929 companies runsonwhat tracks.

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

The companies with the stacks most like Chai's are IT Engineering Company Edusoft Ltd Skopje, Elite Seller, Goodyear Bicycle Tires and mnot, according to runsonwhat (November 2026). Each shares 2 to 4 tools with Chai, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Chai uses?

runsonwhat reads public records only. Of the 10 tools at Chai, 6 were found through DNS records, 3 through code on chaijs.com and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and chaijs.com about monthly.


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