What powers captain.dev?
Last seen Sep 2026 · 18 technologies across 13 categories
Analytics
CDN
Development
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
Surveys
UI frameworks
AI Crawlers
Restricts 4 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- ClaudeBot Restricted
- GPTBot Restricted
Search and AI assistants
- OAI-SearchBot Restricted
- PerplexityBot Restricted
The other 29 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt not found
AI Crawlers
4 of 33 AI crawlers restricted
Standards: llms.txt, llms-full.txt
Audience
- 100% desktop
United States
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
0.88 / 10 · ranked #14,896,178 of all domains
2 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Infrastructure
- Hosted on Amazon Web Services (216.150.1.1)
- DNS: Cloudflare DNS
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 8,901,005, 3 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted