Klaviyo + Shopify: Wiring the Integration and Starting Without Missing the Essentials

If you sell on Shopify, the integration with Klaviyo is probably the best reason to choose this tool over another. It automatically pulls in your customers, orders and catalogue, and turns every behaviour on your store into a marketing trigger. The connection is simple. What you do with it next makes all the difference.

Here is how to wire it properly, then switch on what matters, without leaving half the value on the table.

Step 1: connect Klaviyo and Shopify

The basics take a few minutes.

1. From Klaviyo, add the Shopify integration (or install the Klaviyo app from the Shopify App Store).
2. Authorise the connection between the two accounts.
3. Let the sync run: Klaviyo imports your customers, order history and product catalogue.

At this point you already have a valuable foundation: your existing contacts are in Klaviyo, with their purchase history. You can segment immediately on real data, without waiting to collect anything.

Step 2: switch on onsite tracking

This is the step many skip, and it is a mistake. Onsite tracking (Active on Site) places a script on your store that records browsing: products viewed, pages seen, cart additions.

Why it is decisive: without it, you lose triggers such as browse abandonment (a visitor looks at a product without adding it to the cart) and you weaken your behavioural segments. Switch it on, taking care to respect your visitors' cookie consent, as with any tracker.

Step 3: create your capture forms

An integration that is wired up but a list that does not grow is useless. Set up at least one signup form: a welcome pop-up with a clear incentive (guide, code, selection), or a form embedded in a page.

Two golden rules. Clean consent: an unticked box, a clear mention of what people are subscribing to, proof kept. And an honest incentive: promise something you will deliver in the welcome series. This is the fuel for all your flows.

Step 4: build the flows that pay

The integration comes into its own here. Thanks to Shopify data and onsite tracking, Klaviyo triggers scenarios on precise behaviours. Switch them on in this order:

1. Abandoned cart: the most profitable, it catches near-decided buyers.
2. Welcome: converts a new subscriber while attention is at its peak.
3. Post-purchase: drives repurchase and gathers reviews.
4. Browse abandonment: follows up a visitor who looked without adding to the cart (requires onsite tracking).

The step-by-step build of each, with the right delays and the mistakes to avoid, is in our dedicated guide: the Klaviyo flows that pay.

Step 5: check before sending at scale

Before opening the floodgates, three quick checks prevent damage.

• A test send on each flow, to check the rendering, the links and the product data shown.
• Deliverability: authenticate your sending domain (the email settings) so you do not land in spam. Our deliverability guide covers the reflexes.
• Consent: make sure only opt-in contacts enter your flows, never a list imported without a legal basis.

The mistakes that cost you

Wiring everything and switching on nothing. The integration alone sends nothing. Without flows or forms, you pay Klaviyo to watch data.

Forgetting onsite tracking. You deprive yourself of half the behavioural triggers.

Piling up contacts without cleaning them. At Klaviyo, every contact is paid for. A base bloated with inactive profiles weighs on the bill and drags down deliverability.

Confusing power with haste. Build a flow, measure, adjust, then move to the next. An abandoned cart that runs well beats five sloppy flows.

And then?

Once the integration is in place and the first flows are live, you have a machine that works continuously on your visitors' behaviour. That is exactly what Klaviyo exists for, and what justifies its price when you use it.

If you are still weighing Klaviyo against a cheaper European alternative before committing on Shopify, our Klaviyo vs Brevo comparison sets out the choice. And to place email in a full e-commerce view, see our AI stack for e-commerce and our guide to AI for small businesses in 2026.