Migration & integrations
Klaviyo
Klaviyo is the email and SMS marketing platform most Shopify merchants use. Its value is the depth of its Shopify integration: it syncs order and browsing history, which is what makes abandoned-cart, win-back, and post-purchase flows target the right people. Those automated flows, not campaigns, are where nearly all of its revenue contribution comes from.
Why it matters
Email and SMS are the only acquisition and retention channels whose cost does not rise with an auction. Every other channel gets more expensive as competitors bid; an owned list costs the same to reach next year as this year, which is why CAC pressure pushes budget toward it.
The reason Klaviyo dominates on Shopify is depth of integration rather than features. It syncs orders, products, and browsing behaviour, which means segmentation can be based on what someone actually bought and viewed rather than on which form they filled in. That is the difference between a newsletter and a lifecycle programme.
The distinction that matters commercially: campaigns are the emails a team sends, flows are the ones that send themselves. Flows produce most of the revenue and receive most of the neglect.
How it works on Shopify
The integration pulls order history, product catalogue, and on-site behaviour into customer profiles, and pushes back segment membership Shopify can act on.
A small set of flows carries the majority of the value. Abandoned checkout and browse abandonment recover intent already demonstrated. Welcome series converts the subscriber who just arrived. Post-purchase sets expectations, reduces support contact, and asks for a review at the right moment. Win-back reaches customers whose purchase interval has lapsed. Replenishment suits consumables, timed from the product's actual consumption cycle.
Segmentation is where the platform earns its cost. Recency, frequency, and monetary value together identify the customers worth different treatment, and predictive attributes estimate when someone is due to buy again.
Deliverability is the constraint nobody plans for. Sending to an unengaged list damages sender reputation, which quietly reduces inbox placement for everyone else — so list hygiene, sunsetting inactive subscribers, and authentication records are foundational rather than optional.
For subscription businesses, dunning and churn-prevention flows connect directly to churn rate.
Common mistakes
- Campaigns without flows. Broadcasting weekly while the automated revenue sits unbuilt.
- Abandoned cart only. It is the first flow and the smallest part of the opportunity.
- Sending to everyone. Unsegmented sends to unengaged subscribers cost deliverability.
- No sunset policy. A list that only grows eventually stops reaching inboxes.
- Ignoring SMS consent rules. Consent requirements differ by jurisdiction and are enforced.
- Set and forget. Flows written at launch and never revisited decay as the catalogue and audience change.
When you need help
The common case is a store with the platform installed, one abandoned cart flow running, and everything else untouched — paying for capability it does not use. Building the full flow set and a segmentation model is a defined piece of work with revenue attached.
The other case is deliverability trouble: open rates falling, emails landing in promotions or spam. That is authentication, list hygiene, and sending practice, and it needs diagnosis rather than more sending. It is also the problem that gets worse the longer it is left, because reputation recovers slowly.
Related terms
- Cart abandonmentCart abandonment is when a shopper adds items to a cart and leaves without buying. Roughly 70% of carts are abandoned. The dominant causes are measurable and fixable: unexpected shipping cost, forced account creation, a slow or long checkout, and missing payment methods. Recovery emails claw back a share, but reducing the abandonment itself pays better.
- LTVLTV, or customer lifetime value, is the total profit a business expects from one customer across the whole relationship. It is what justifies acquisition spend: if LTV is $180 and it costs $60 to acquire a customer, the ratio of 3:1 is generally considered healthy. LTV rises with repeat purchase rate, AOV, and margin, and falls with churn.
- API integrationAn API integration connects Shopify to another system — an ERP, a 3PL, a CRM — so data flows between them without manual re-entry. Direction and authority matter more than the plumbing: deciding which system owns inventory, and which merely reflects it, prevents the two from overwriting each other. Most integration bugs are ownership bugs, not transport bugs.