Klaviyo vs OptinMonster

Head-to-head usage across the sites we track.

Top sites by authority

Klaviyo · OptinMonster · 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

Klaviyo · OptinMonster · share of sites in each country using one or the other

United States 94,562

9,806

United Kingdom 37,244

3,334

Canada 29,978

3,179

Australia 27,541

2,180

Germany 24,145

1,964

India 20,024

3,397

France 21,230

1,797

Spain 16,028

1,546

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

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.

All Klaviyo sites · All OptinMonster sites