RackCache vs Varnish
Head-to-head usage across the sites we track.
Top sites by authority
RackCache · Varnish · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
2
115
Open Page Rank 8+
37
1,502
Open Page Rank 7+
109
5,418
Open Page Rank 6+
185
9,371
Open Page Rank 5+
279
14,620
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
RackCache · Varnish · share of sites in each country using one or the other
United States
5,043
85,715
Germany
1,367
32,333
United Kingdom
1,685
28,057
France
1,111
27,422
India
1,576
26,370
Canada
1,950
22,275
Netherlands
859
21,890
Italy
1,011
20,151
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | RackCache | Varnish |
|---|---|---|
| LCP | 2 s | 1.6 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 600 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
RackCache to Varnish
| Domain | When |
|---|---|
| softwaretestingweekly.com | May 2026 |
| shesspeakingsongs.com | Apr 2026 |
| mollyhealey.com | Dec 2025 |
| forrestmccurren.com | Dec 2025 |
| peterbreinholt.com | Dec 2025 |
| justtatem.com | Oct 2025 |
| kurloureggae.com | Oct 2025 |
| dieseltrampoline.com | Oct 2025 |