What powers opencats.org?
Last seen Aug 2026 · 33 technologies across 20 categories
Caching
Varnish
since Mar 2022
CDN
Customer data platform
Documentation
GitBook
since Nov 2022
Font scripts
Google Font API
since Mar 2022
IaaS
Google Cloud
since Nov 2022
Issue trackers
Sentry
since Nov 2022
JavaScript frameworks
JavaScript libraries
Message boards
phpBB
since May 2023
Miscellaneous
HTTP/3
since Aug 2026
Open Graph
since May 2023
Prism
since Nov 2022
RSS
since May 2023
Webpack
since Aug 2026
Operating systems
Ubuntu
since Aug 2018
PaaS
GitHub Pages
since Mar 2022
Vercel
since Aug 2026
Performance
Google Cloud Trace
since Nov 2022
Priority Hints
since Aug 2026
Programming languages
Search engines
Algolia
since Nov 2022
Security
HSTS
since Nov 2022
UI frameworks
Web servers
Webmail
Google Workspace
since Aug 2022
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 72% desktop
- 28% phone
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.45 / 10 · ranked #943,699 of all domains
28 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Fastly
- Weight: 0.3 MB · 10 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Subdomains
| Host | Techs |
|---|---|
| documentation.opencats.org | 21 |
| forums.opencats.org | 11 |
| www.forums.opencats.org | 11 |
| www.opencats.org | 7 |
| demo.opencats.org | 2 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Cloudflare Bot Management Aug 2026
- dropped Google Analytics Aug 2026
- dropped Google Hosted Libraries Aug 2026
- dropped Twitter Aug 2026
- dropped Twitter Ads Aug 2026
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Bot Management Nov 2025