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

France 1,018

30,954

United States 7,944

22,537

Germany 1,245

16,656

United Kingdom 2,903

13,949

Italy 623

15,681

India 2,482

11,543

Spain 742

11,748

Canada 3,026

8,723

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 ConvertKit sites · All Sendinblue sites