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 610

27,194

United States 4,325

19,846

Germany 786

14,837

Italy 457

14,444

United Kingdom 1,714

12,352

India 1,392

10,040

Spain 519

10,837

Canada 1,756

7,447

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, Sep 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