OpenSSL vs Shelf
Head-to-head usage across the sites we track.
Top sites by authority
OpenSSL · Shelf · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
34
0
Open Page Rank 8+
733
1
Open Page Rank 7+
2,357
1
Open Page Rank 6+
3,971
1
Open Page Rank 5+
6,181
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
OpenSSL · Shelf · share of sites in each country using one or the other
United States
28,919
13
Japan
22,279
5
India
16,626
5
Brazil
12,544
7
Germany
11,646
7
Italy
11,443
5
United Kingdom
11,177
170
South Korea
11,314
6
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | OpenSSL | Shelf |
|---|---|---|
| LCP | 1.7 s | 1.2 s |
| INP | 75 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 300 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.