Site Kit vs Siteimprove
Head-to-head usage across the sites we track.
Top sites by authority
Site Kit · Siteimprove · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
39
34
Open Page Rank 8+
636
371
Open Page Rank 7+
2,691
1,036
Open Page Rank 6+
5,912
1,656
Open Page Rank 5+
12,410
2,354
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Site Kit · Siteimprove · share of sites in each country using one or the other
United States
194,442
5,248
India
96,669
1,936
Brazil
73,670
766
Japan
73,684
616
United Kingdom
63,934
1,579
France
62,421
826
Spain
58,678
773
Italy
55,218
775
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Site Kit | Siteimprove |
|---|---|---|
| LCP | 2.4 s | 1.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1300 ms | 600 ms |
Median site's p75 values from the Chrome UX Report, Aug 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.
Site Kit to Siteimprove
| Domain | When |
|---|---|
| usdahomes.com | Jun 2026 |
| johnsoncontrols.es | Dec 2025 |
| hylandsestateweddings.co.uk | Dec 2025 |
Siteimprove to Site Kit
| Domain | When |
|---|---|
| cmlf.com | Jan 2026 |
| kruzey.com.au | Jan 2026 |