Klaviyo Reverse ETL Connector

Sync data from your warehouse to Klaviyo with Weld's reverse ETL. Activate enriched data where your team works.

Get started for free View documentation

Warehouse

Destination

Host

account.warehouse.com

Database

analytics_db

REVERSE ETL

Klaviyo

Weld's Klaviyo reverse ETL connector lets you push enriched and transformed data from your data warehouse directly into Klaviyo. Activate your warehouse data by syncing computed segments, lead scores, and other insights, no manual exports or custom scripts required.

Klaviyo data schema

11tables

111fields

5relationships

- Table

- Sub table

React Flow

Open full-page schema explorer

REVERSE ETL

Supported objects in Klaviyo

Push data from your warehouse into the following Klaviyo objects. Map warehouse columns to destination fields with full control.

profile

campaign

segment

metric

event

flow

email_template

list

and 3 more

Everything you need to get started

DOCUMENTATION

Klaviyo setup guide→

Step-by-step instructions to configure and start syncing.

BLOG

Product updates & insights→

The latest on new connectors, features, and data best practices.

WELD CONNECT API

Build custom connectors→

Use the Weld Connect API to build and publish your own connector.

FAQ

Common questions→

Answers to frequently asked questions about Weld connectors.

Weld Connect API

Set up programmatically

Use the Weld Connect REST API to create Klaviyo connections, configure ELT syncs, and manage pipelines entirely through code. Built for embedding, automation, and CI/CD workflows.

Explore Weld Connect API reference

POST/elt_syncs

# Create a Klaviyo ELT sync
curl -X POST https://connect.weld.app/elt_syncs \
  -H "x-api-key: $API_KEY" \
  -d '{
    "connection_id": "conn_abc123",
    "integration_id": "klaviyo",
    "destination_schema_name": "klaviyo_data",
    "sync_interval": "0 * * * *"
  }'
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FAQs

What is a connector?

A connector links Weld to apps, files, ad platforms, and databases to move data to and from them. Each connector supports as many syncs as you need.

What data sources can I connect to Weld?

Weld supports a wide range of data sources, including databases, cloud storage, and APIs. You can find the full list on the connectors page.

What if I can’t find the connector I need?

We are constantly building new integrations based on customer demand. You can also build a custom connector yourself using the Weld Connect API.

Is there a free trial available?

Yes, Weld offers a 14-day free trial with no upfront credit card requirement. This lets you explore all features before committing to a paid plan.

Does Weld need to connect directly to my production database?

No. With high throughput systems, we recommend creating a read replica to avoid unnecessary load on your production services.

Does Weld store my data?

Weld does not store your data. We are only responsible for moving data from source to destination, we simply help you transfer and prepare it for analysis.