Convert vs Optimizely

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

Top sites by authority

Convert · Optimizely · 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

Convert · Optimizely · share of sites in each country using one or the other

United States 5,186

25,512

Canada 1,986

6,167

India 2,282

4,899

United Kingdom 2,275

4,567

Australia 1,324

4,029

Germany 1,776

3,412

Netherlands 1,863

2,940

France 1,424

3,284

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 Convert sites · All Optimizely sites