List growth and pop-up options
We do not have a pop-up but you have lots of options for that because it only needs to integrate with Shopify and not us specifically.
You can either use your theme's pop-up, if it has one, and/or our email capture banner. Our banner app is free for Seguno users when you install it from the "Grow your subscriber list" dashboard card within Seguno. If you don't like those options, any pop-up app that properly syncs signups into Shopify as 'accepts email marketing' will work and properly trigger the Seguno welcome automation. Privy has a generous free plan.