NetSuite Klaviyo Integration: Sync Customer and Order Data Automatically

Klaviyo is the email and SMS platform of choice for most eCommerce brands. NetSuite is where your orders, customers, and revenue data actually live. Between them is a gap that costs you marketing precision.

If your Klaviyo segments are based on purchase data from Shopify or BigCommerce but your actual source of truth for customer records is NetSuite, your email lists are incomplete. High-value B2B customers who order offline, wholesale orders processed directly in NetSuite, and phone orders never appear in Klaviyo -- meaning your best customers are not in your email flows.

Why NetSuite and Klaviyo Do Not Talk by Default

Klaviyo is designed to pull data from eCommerce platforms like Shopify, BigCommerce, and WooCommerce via native integrations. It was not designed to pull from NetSuite directly.

If all of your orders flow through your eCommerce platform, Klaviyo's native integration gives you reasonable coverage. But if any significant revenue -- offline B2B sales, wholesale accounts, phone orders, EDI orders -- lives only in NetSuite, Klaviyo never sees it.

What a NetSuite Klaviyo Integration Does

A NetSuite to Klaviyo integration pulls customer and order data from NetSuite and pushes it to Klaviyo as profile properties and events. This enables:

Complete customer profiles. A customer who buys wholesale offline and retail online appears as one unified profile in Klaviyo with their full purchase history.

Revenue-based segmentation. Segment by lifetime value calculated from NetSuite, not just eCommerce platform data. Identify your top 100 customers by total revenue, including offline orders.

Triggered flows from NetSuite events. A NetSuite fulfillment triggers a shipping notification. A NetSuite invoice triggers a payment reminder. A NetSuite renewal triggers a re-order email.

Suppression lists from NetSuite. B2B accounts with a dedicated account manager should not receive generic promotional emails. NetSuite customer tags or types can suppress those contacts from standard flows.

What Data Should Flow from NetSuite to Klaviyo

Customer profile properties: Customer name, company, NetSuite customer ID, customer type (B2C, B2B, wholesale), payment terms, credit limit, assigned sales rep, NetSuite class or department.

Order events: Order placed, order amount, items ordered, fulfillment status, tracking number, return and refund events.

Custom properties: Subscription renewal date, contract value, PO number, last order date, average order value from NetSuite data.

How to Build a NetSuite Klaviyo Integration

Option 1: Klaviyo's API and custom middleware. Klaviyo has an API that accepts profile and event data. You can build custom middleware that reads from NetSuite's SuiteScript or REST APIs and pushes to Klaviyo. Development cost: $10,000 to $40,000.

Option 2: iPaaS platform. Celigo or Boomi can connect NetSuite to Klaviyo using their connector libraries. If you are already on one of these platforms, adding a Klaviyo flow is incremental. If you are not, the iPaaS cost alone ($1,500 to $3,500/month) is hard to justify for this single use case.

Option 3: eCommerce connector plus Klaviyo's native integration. If your eCommerce platform is connected to both NetSuite (via a connector like Dominate) and Klaviyo (via its native integration), most customer data flows automatically. The gap to fill is offline and B2B orders that originate in NetSuite but never touch your eCommerce platform.

The Bottom Line

If all of your orders come through a single eCommerce platform and none originate in NetSuite directly, Klaviyo's native platform integration is sufficient. If you have any significant offline, wholesale, or direct B2B revenue tracked in NetSuite, a dedicated sync will make your email marketing meaningfully more effective.

The Foundation: Get NetSuite and Your eCommerce Platform Synced First

The most practical path to Klaviyo getting complete data is: (1) connect your eCommerce platform to NetSuite with a purpose-built connector, (2) connect Klaviyo to your eCommerce platform via its native integration, (3) handle the offline/B2B gap with a direct NetSuite to Klaviyo sync.

Steps 1 and 2 are straightforward. Dominate handles Step 1 -- connecting Shopify, Magento, Adobe Commerce, BigCommerce, or WooCommerce to NetSuite. Klaviyo's native integration handles Step 2 automatically once your platform is the source of truth for all orders. For Step 3, the right approach depends on how much revenue flows through NetSuite without touching your storefront.

For most eCommerce brands, Steps 1 and 2 cover 80 to 95% of customer data. The direct NetSuite to Klaviyo sync (Step 3) is only necessary if you have significant offline B2B revenue.

View the integration options for your eCommerce platform, or contact our team to discuss your specific data flow setup.