What powers 
seo-stack.io?
Last seen Sep 2026 · 39 technologies across 21 categories
Analytics
Google Analytics
since Feb 2023
Microsoft Clarity
since Jul 2024
CDN
Cloudflare
since Jul 2024
CMS
Databases
MySQL
since Feb 2023
Font scripts
Google Font API
since Feb 2023
Issue trackers
Sentry
since Nov 2025
JavaScript libraries
Live chat
Tawk.to
since Jul 2024
Miscellaneous
Operating systems
Ubuntu
since Feb 2023
PaaS
Vercel
since Aug 2025
Performance
Priority Hints
since Aug 2025
Programming languages
Security
Tag managers
Google Tag Manager
since Feb 2023
UI frameworks
Video players
Vimeo
since Jul 2024
Web frameworks
Express
since Jul 2024
Web servers
Webmail
Google Workspace
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 83% desktop
- 17% phone
United Kingdom
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.77 / 10 · ranked #727,815 of all domains
37 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Vercel
- Weight: 24.5 MB · 71 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Amazon Web Services (216.150.1.1)
- DNS: DigitalOcean
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 6,996,591, 3 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| seo-stack.io | 17 |
| app.seo-stack.io | 15 |
| www.seo-stack.io | 13 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Headless UI Apr 2026
- dropped MobX Apr 2026
- dropped Next.js Apr 2026
- dropped Next.js App Router Apr 2026
- dropped React Apr 2026
- dropped Webpack Apr 2026
- dropped Google Hosted Libraries Nov 2025
- dropped HTTP/3 Nov 2025
- dropped jsDelivr Nov 2025
- dropped Webflow Nov 2025