Stellacarakasi review for Klaviyo: Email Marketing & SMS

I've been using Klaviyo for over a year. I chose it because of the deep integration with Shopify. I can create lists or automation flows for people who have bought certain products or even people who have bought something blue in size small, or just people who viewed a certain product page. The customer service has always been great and the development team has been continuously pumping out new features.