Klaviyo vs Poptin

Klaviyo runs on 55,004 ranked sites (0.6%); Poptin on 3,616 (<0.1%).

By rank tier
TierKlaviyoSharePoptinShare
Top 1,0000<0.1%10.1%
Top 10,00070.1%3<0.1%
Top 100,0002430.2%25<0.1%
Top 1,000,0002,1270.2%220<0.1%
All ranked55,0040.6%3,616<0.1%