What powers andrewheiss.com?
Last seen Aug 2026 · 37 technologies across 15 categories
Analytics
Appointment scheduling
Calendly
since Dec 2022
Caching
Varnish
since Nov 2022
CDN
cdnjs
since Dec 2021
Cloudflare
since Dec 2022
Fastly
since Nov 2022
Google Hosted Libraries
since Jan 2026
jsDelivr
since Sep 2020
Font scripts
Google Font API
since Sep 2020
JavaScript graphics
JavaScript libraries
Clipboard.js
since Oct 2022
Highlight.js
since Sep 2020
Instant.Page
since Dec 2021
Isotope
since Jul 2021
LazySizes
since Dec 2022
Lightbox
since Mar 2026
MobX
since Sep 2020
Tippy.js
since Oct 2022
Miscellaneous
HTTP/3
since Feb 2024
Open Graph
since Sep 2022
Popper
since Oct 2022
PWA
since Aug 2022
RSS
since Dec 2022
Operating systems
Ubuntu
since Feb 2019
PaaS
GitHub Pages
since Nov 2022
Programming languages
Static site generator
Hugo
since Dec 2020
UI frameworks
Bootstrap
since Sep 2020
Web server extensions
Web servers
Caddy
since Feb 2024
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 84% desktop
- 16% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.54 / 10 · ranked #395,177 of all domains
111 referring domains · OpenPageRank
Search traffic
440 est. monthly organic visits (US)
462 keywords in Google's top 30
Core Web Vitals
| LCP | 1.2 s |
| INP | 25 ms |
| CLS | 0.05 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 0.9 MB · 34 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Subdomains
| Host | Techs |
|---|---|
| evalf20.classes.andrewheiss.com | 24 |
| datavizs21.classes.andrewheiss.com | 23 |
| econs22.classes.andrewheiss.com | 20 |
| econsp21.classes.andrewheiss.com | 20 |
| evalf21.classes.andrewheiss.com | 20 |
| evalsp21.classes.andrewheiss.com | 20 |
| datavizm20.classes.andrewheiss.com | 19 |
| econs20.classes.andrewheiss.com | 19 |
| evalsp20.classes.andrewheiss.com | 19 |
| nullworlds.andrewheiss.com | 14 |
| datavizf23.classes.andrewheiss.com | 13 |
| bayess23.classes.andrewheiss.com | 12 |
| bayesf22.classes.andrewheiss.com | 11 |
| bayessp23.classes.andrewheiss.com | 11 |
| evalsp23.classes.andrewheiss.com | 11 |
| www.andrewheiss.com | 9 |
| bayesf22-notebook.classes.andrewheiss.com | 8 |
| datavizf24.classes.andrewheiss.com | 8 |
| datavizf25.classes.andrewheiss.com | 8 |
| datavizs23.classes.andrewheiss.com | 8 |
| datavizs24.classes.andrewheiss.com | 8 |
| datavizs25.classes.andrewheiss.com | 8 |
| datavizsp25.classes.andrewheiss.com | 8 |
| evalf22.classes.andrewheiss.com | 8 |