AddEvent vs EventOn
Head-to-head usage across the sites we track.
Top sites by authority
AddEvent · EventOn · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
5
3
Open Page Rank 8+
25
65
Open Page Rank 7+
65
151
Open Page Rank 6+
113
260
Open Page Rank 5+
159
446
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
AddEvent · EventOn · share of sites in each country using one or the other
United States
588
3,319
Germany
150
1,218
United Kingdom
253
1,016
Spain
135
1,006
France
161
943
Canada
232
781
Italy
130
826
India
253
593
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AddEvent | EventOn |
|---|---|---|
| LCP | 1.9 s | 2.3 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 1200 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.