What powers challengers.academy?
Last seen Aug 2026 · 19 technologies across 13 categories
Analytics
Google Analytics
since May 2023
CDN
cdnjs
since May 2023
Cloudflare
since May 2023
Google Hosted Libraries
since May 2023
jsDelivr
since May 2023
CMS
Databases
MySQL
since May 2023
JavaScript frameworks
JavaScript libraries
Marketing automation
Salesforce Marketing Cloud Account Engagement
since Nov 2023
Miscellaneous
Open Graph
since May 2023
Programming languages
PHP
since May 2023
SEO
Tag managers
Google Tag Manager
since May 2023
Web servers
Nginx
since May 2023
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Aug 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 65% phone
- 35% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.15 / 10 · ranked #10,470,305 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 88.6 MB · 229 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Aug 2026.
Full technology history →
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Recent changes
- dropped Twitter Emoji (Twemoji) Jun 2026
- detected Twitter Emoji (Twemoji) Jan 2026