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 103,547

11,140

United Kingdom 40,783

3,959

Canada 33,265

3,772

Australia 30,331

2,496

Germany 26,133

2,298

India 22,437

3,980

France 23,908

2,342

Spain 16,738

1,879

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, 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.

All Klaviyo sites · All OptinMonster sites