What powers openletterbooks.org?
Last seen Jun 2026 · 15 technologies across 10 categories
Analytics
Google Analytics
since Jan 2019
CDN
Cloudflare
since Jun 2019
Google Hosted Libraries
since Feb 2022
CRM
Anthology Encompass
since Mar 2023
Ecommerce
Cart Functionality
since Aug 2020
Shopify
since Jan 2019
Font scripts
Google Font API
since Jan 2019
JavaScript libraries
Miscellaneous
HTTP/3
since Sep 2022
Open Graph
since Sep 2022
Payment processors
Shop Pay
since Feb 2022
Performance
Priority Hints
since Feb 2023
Security
HSTS
since Sep 2022
Audience
- 61% phone
- 39% desktop
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.69 / 10 · ranked #355,900 of all domains
135 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- CDN: Cloudflare
- Weight: 2.4 MB · 208 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- dropped Amazon S3 Feb 2026
- dropped Amazon Web Services Feb 2026
- dropped MailChimp Feb 2026
- dropped Twitter Feb 2026
- dropped Twitter Ads Feb 2026
- dropped Cloudflare Bot Management Nov 2025