Sleeknote

Sleeknote is a no-code popup builder that's been around since 2011, bringing a mature approach to email and SMS list capture. The platform lets you build popups and forms without touching code, and targets them based on visitor behavior like pages visited, time on site, or whether they're a returning customer. Sleeknote syncs with Shopify so you can personalize popups for existing customers versus new visitors.

This tool suits store owners who want powerful behavioral targeting without hiring a developer. The long track record means Sleeknote handles the edge cases that simpler builders miss, like mobile responsiveness and browser compatibility. It's particularly strong if you want to treat new and returning customers differently or if you're running multiple popup strategies at once.