Advanced Custom Fields vs RankMath SEO

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

Top sites by authority

Advanced Custom Fields · RankMath SEO · 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

Advanced Custom Fields · RankMath SEO · share of sites in each country using one or the other

United States 2,045

125,647

India 538

80,255

Germany 591

54,659

United Kingdom 802

43,847

France 1,157

41,204

Spain 484

41,448

Brazil 363

36,283

Italy 446

36,163

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 Advanced Custom Fields sites · All RankMath SEO sites