Constant Contact vs OneSignal
Head-to-head usage across the sites we track.
Top sites by authority
Constant Contact · OneSignal · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Constant Contact · OneSignal · share of sites in each country using one or the other
United States
26,811
12,390
India
1,648
14,332
Brazil
494
9,729
Canada
3,324
5,991
United Kingdom
1,472
7,472
Germany
532
7,819
France
532
6,996
Italy
421
6,485
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Constant Contact | OneSignal |
|---|---|---|
| LCP | 1.7 s | 2.5 s |
| INP | 50 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 700 ms | 1000 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Constant Contact to OneSignal
| Domain | When |
|---|---|
| neworleansrvresort.com | Nov 2025 |
OneSignal to Constant Contact
| Domain | When |
|---|---|
| southasianherald.com | Jan 2026 |
| neworleansrvresort.com | Nov 2025 |