Websites using core-js
core-js is a modular standard library for JavaScript, with polyfills for newer ECMAScript features.
core-js is available as open-source software.
Wappalyzer tracks 5,000,000 live websites using core-js. Find top core-js websites, and build a filtered list of companies using core-js.
Top websites using core-js
These are the most trafficked websites using core-js.
| Hostname | Traffic | Tech spend | Country |
|---|---|---|---|
| app.clickup.com | Very high | Very low | |
| regulator-bpo.sqprod.co | Very high | Very low | |
| chess.com | Very high | Very low | |
| flaticon.com | Very high | Very high | |
| cloud.digitalocean.com | Very high | Medium | |
| regulator.sqprod.co | Very high | Very low | |
| gall.dcinside.com | Very high | Medium | 🇰🇷 |
| cursor.com | Very high | Low | |
| toolbox.sqprod.co | High | Very low | |
| chatgpt.com | Medium | 🇺🇸 | |
| fiverr.com | Medium | ||
| gitlab.com | Low | 🇺🇸 | |
| canva.com | Medium | 🇺🇸 | |
| bilibili.com | Very low | 🇨🇳 | |
| dash.cloudflare.com | Medium | 🇺🇸 | |
| claude.ai | Medium | 🇺🇸 | |
| mercadolivre.com.br | Very low | 🇧🇷 | |
| discord.com | Medium | ||
| app.asana.com | |||
| lista.mercadolivre.com.br | Very low | 🇧🇷 | |
| mercadolibre.com.ar | Low | 🇦🇷 | |
| chatwork.com | Medium | 🇺🇸 | |
| dribbble.com | Very low | 🇺🇸 | |
| chat.deepseek.com | Very low | 🇺🇸 | |
| status.claude.com | Medium |
Where is core-js used?
A breakdown of countries and languages across the websites where Wappalyzer detects core-js.
Countries
Languages
Top alternatives to core-js
The largest alternative technologies in the same category, ranked by detected websites.
| Technology | Websites |
|---|---|
| 5,000,000 | |
| 5,000,000 | |
| 5,000,000 | |
| 5,000,000 | |
| 5,000,000 | |
| 4,700,000 | |
| 3,200,000 | |
| 2,900,000 | |
| 2,400,000 | |
| 2,400,000 |
Find companies using core-js
Get company and contact details for 5,000,000 core-js websites, so you can turn research into outreach faster.
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Companies in United States
Find core-js companies located in United States.
Companies in United Kingdom
Find core-js companies located in United Kingdom.
Companies with emails and phone numbers
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Top 5,000 websites by traffic
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Websites with a .com domain
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5,000 low-traffic websites
Focus on lower-traffic core-js websites for long-tail prospecting.