EcommerceCustom integration

Shopify Klaviyo integration

Shopify and Klaviyo connected with predictive segmentation and advanced flows.

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Shopify

↔

Klaviyo

Implementation time · 5-10 días laborables

Diagnosis

The problem

The official Shopify to Klaviyo integration is very good for 80% of basic cases. But brands with multi-store setups, complex segmentations, or flows that depend on backend events (not just orders and customers) fall short. The result: they hire Klaviyo agencies at 2-5k euros a month for things that are technical integration work, not strategy. The official one covers the basics; we cover what is missing so your Klaviyo delivers maximum ROI.

Proposal

The solution

Klaviyo is the premium standard for email marketing on Shopify. The official integration is good, but there are cases where you need more: multi-store with shared flows, segmentation by custom-calculated LTV, events triggered from the backend, and so on. Our integration extends the official one to cover those advanced cases. For serious Shopify brands where email marketing is the primary channel, it is the difference between 'having Klaviyo' and 'getting the most out of it'.

Scope

What we automate

Multi-store Shopify with shared Klaviyo flows but correct attribution
Custom-calculated LTV (including refunds, returns, shipping costs) to a Klaviyo property
Backend events (customer added a payment method, opened a support chat) to Klaviyo
Browse abandonment with the specific products viewed
Churn prediction with simple ML to an at-risk segment
Sync of custom products (non-standard Shopify) to Klaviyo
Reviews received (Stamped, Loox) to Klaviyo properties for segmentation
Loyalty (Smile.io, LoyaltyLion) to points in Klaviyo for campaigns

Who uses it

Real use cases

These are the profiles that most ask us for the Shopify ↔ Klaviyo integration and what they get in the end.

Case 01

DTC brand with 3 Shopify stores (ES/FR/IT)

Before: A single customer buying in 2 stores showed up as 2 separate Klaviyo profiles.

After: Unified identity. One customer equals one profile with cross-store history.

Case 02

Brand with Smile.io loyalty active

Before: Loyalty points never reached Klaviyo for redemption campaigns.

After: Points in a Klaviyo property. Campaigns like 'you have 500 points, redeem for 10% off' triggered.

Case 03

Brand with an external review platform (Stamped)

Before: Reviews received did not segment in Klaviyo.

After: A customer with a 5-star review to an ambassadors segment. A dedicated refer-a-friend campaign.

Before / After

What changes exactly

Without the integration

Multi-store with duplicated customers in Klaviyo
Loyalty and reviews unused for email
LTV miscalculated by leaving out returns
Klaviyo agency charging for technical work

✓

With the integration

Single cross-store identity with complete history
Loyalty and reviews integrated as triggers
Accurate LTV including costs and returns
Klaviyo agency focused on strategy, not setup

Architecture

How we build it

Shopify webhooks (orders/*, customers/*, checkouts/*) plus custom backend events and the Klaviyo Client API and Server API. Idempotency with metadata IDs. For multi-store, we aggregate identity correctly so a customer across 3 stores becomes a single Klaviyo profile with a triple history.

flow.ts

webhook klaviyo.event

→ queue.enqueue(jobId)

→ worker.handle() // idempotent

→ shopify.api.call() // retries with backoff

→ log.emit({ status: 'ok' })

FAQ

Frequently asked questions

What about the official Shopify to Klaviyo integration?

Keep it active. We extend it, we do not replace it. The official one covers 80%; we cover the advanced 20% you need to stand out.

Multi-store?

Yes, this is one of the main cases. Each store can have its own flows or share a unified identity. We decide that in the diagnosis.

Klaviyo SMS?

Yes. For companies with Klaviyo SMS active, we connect Shopify triggers to SMS for high order values, urgent recovery, and so on.

Klaviyo Predictive Analytics?

If your Klaviyo Pro or above plan has it, we expose it as a property in Shopify for cross-system segmentation.

Apps like Smile.io, LoyaltyLion, Stamped?

Any Shopify app with webhooks or an API we connect to Klaviyo. If you have a specific one, we assess it in the diagnosis.

How long does it take?

Between 5 and 10 business days depending on complexity. Multi-store plus external apps rises to 12-15.

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