Bootstrap vs siimple
Head-to-head usage across the sites we track.
Top sites by authority
Bootstrap · siimple · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
180
0
Open Page Rank 8+
3,860
1
Open Page Rank 7+
18,993
1
Open Page Rank 6+
40,203
1
Open Page Rank 5+
74,817
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bootstrap · siimple · share of sites in each country using one or the other
United States
886,770
1
India
429,293
2
Germany
322,762
1
United Kingdom
295,976
1
France
279,130
1
Brazil
273,285
1
Italy
251,088
1
Spain
202,979
1
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bootstrap | siimple |
|---|---|---|
| LCP | 1.8 s | 2.5 s |
| INP | 75 ms | 150 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 1500 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.