Klaviyo

Email and SMS built around Shopify data, with the segmentation and flow logic most stores eventually need.

Marketing · Free up to 250 contacts; paid from around $20/month

Klaviyo syncs your Shopify catalogue, orders and browsing behaviour, which is what makes proper segmentation possible — first-time buyers, lapsed customers, people who browsed one collection twice.

The three flows that pay for it are welcome, abandoned checkout and post-purchase. Get those right before building anything more elaborate.

It gets expensive as your list grows, so prune unengaged profiles regularly rather than paying to store them.

Good for

• Behaviour-triggered email flows
• Segmentation on Shopify order data
• Revenue attribution per flow and campaign