Websites Powered by RackCache

55,773 websites tracked using RackCache (Caching) · github.com

RackCache is a caching layer that speeds up page delivery by storing generated content. Its official site is github.com. PoweredBy tracks the websites that use RackCache across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the caching ecosystem.

Usage trend

Domains observed using RackCache in each month's HTTP Archive crawl, Apr 2018 to Jun 2026 · peak 18,761 in Mar 2023. The tracked total above also counts sites not re-crawled recently.

Core Web Vitals

LCP 2 s INP 75 ms CLS 0 TTFB 900 ms

Median site among 12,386 RackCache sites with Chrome UX data, p75 values, Jun 2026.

Top countries

United States 6,090
Taiwan 3,125
Canada 2,335
United Kingdom 2,040
India 1,915
Germany 1,600
Japan 1,502
France 1,420

Sites using RackCache by audience country, Chrome UX Report.

Top sites by authority

9+ 1% · 4 of 372 sites
8+ <1% · 48 of 7,677 sites
7+ <1% · 138 of 45,712 sites
6+ <1% · 227 of 110,136 sites
5+ <1% · 350 of 246,751 sites

The share of the web's most authoritative domains, by Open Page Rank tier, seen running RackCache in recent crawls. Only 372 domains worldwide score 9 or higher.

Websites using RackCache

#DomainOpen Page RankOPREst. monthly visits (US)Visits (US)KeywordsFirst seen
8201 zuzubits.com - - - Jun 2026
8202 zxc-lab.com 0.10/10 - - Jun 2026

Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.

Download top 10,000 as CSV (zip) →

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