ConvertKit vs Sendinblue

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

Top sites by authority

ConvertKit · Sendinblue · 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

ConvertKit · Sendinblue · share of sites in each country using one or the other

United States 7,034

19,918

France 801

25,958

Germany 1,077

14,883

United Kingdom 2,496

12,372

Italy 563

13,878

India 2,075

10,203

Spain 637

10,428

Canada 2,570

7,431

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 ConvertKit sites · All Sendinblue sites