What powers 
happy.engineering?
Last seen Aug 2026 · 10 technologies across 7 categories
Analytics
Cloudflare Browser Insights
since Nov 2025
Caching
Varnish
since Sep 2025
CDN
Cloudflare
since Sep 2025
Fastly
since Sep 2025
Miscellaneous
PaaS
GitHub Pages
since Sep 2025
Performance
Priority Hints
since Sep 2025
SEO
Ahrefs
since Oct 2025
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 73% desktop
- 27% phone
United States
China
India
Japan
Singapore
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.46 / 10 · ranked #935,720 of all domains
42 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Fastly
- Weight: 1.3 MB · 13 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Industry: Software and apps (declares
SoftwareApplication)
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Fastly (185.199.108.153, IPv6)
- DNS: Cloudflare DNS
- Email: Fastmail
- Email security: SPF (neutral), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 2,030,728, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| happy.engineering | 7 |
| app.happy.engineering | 4 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Headless UI Aug 2026
- dropped Next.js Aug 2026
- dropped Next.js App Router Aug 2026
- dropped Node.js Aug 2026
- dropped React Aug 2026
- dropped Tailwind CSS Aug 2026
- dropped Webpack Aug 2026
- dropped Stripe Feb 2026
- dropped Svelte Feb 2026
- detected Cloudflare Browser Insights Nov 2025
- detected Ahrefs Oct 2025