This page describes how to use Census with Klaviyo.

Klaviyo is a customer data and marketing platform specializing in marketing for Retail, Ecommerce and D2C businesses. It's a powerful, scalable, and secure platform for sending emails, SMS, and more.

🏃‍♀️ Getting Started

As always, the first step is connecting Census to your Klaviyo account.

Census requires two API keys, both a Public and Private key, in order to provide full functionality. To access your API Keys,

  1. Within Klaviyo, click your organization name in the bottom left.

  2. Navigate to Settings and click API keys from the submenu.

We'll cover how to create both below, and Klaviyo's Help Center provides additional details as well.

1. Private API Key

The Private API Key is used to sync most data to Klaviyo. We recommend creating a new API Key specifically for Census.

Census requires "Full Access" in order to write data to Klaviyo. However, you may use Klaviyo's "Custom Access" Private API Key to limit the access to only the necessary permissions.

2. Public API Key / Site ID

The Public API Key is used solely to access the Klaviyo API that powers Profile Update or Create at higher volume.

Klaviyo only allows a single Site ID so in this case, you can reuse your existing public API Key.

3. Configuring Census

Once you've collected both keys, you can create a new Klaviyo destination in Census.

  1. Within Census, navigate to Destinations.

  2. Click New Destination and select Klaviyo from the dropdown list.

  3. Paste in your Klaviyo Private and Public Keys and click Save.

You should now be ready to create a new sync to Klaviyo from Census!

🗄 Supported Objects and Behaviors

Object Name


Sync Keys



External ID (recommended), Email, Phone Number

Update or Create, Update Only, Delete

Profile & List Audience Sync

External ID (recommended), Email, Phone Number


Unique Event ID


Let us know if you want Census to support additional objects for Klaviyo.

Klaviyo Events

Klaviyo events work like most behavioral event destinations. They require a unique event ID which is used to prevent duplicate events from being created in Klaviyo, as well as a name, timestamp, and custom properties.

One quirk of events in Klaviyo is how events are associated with specific users. Klaviyo will associate events with a user based on the email address provided or the Klaviyo User ID (not an external ID), and so Klaviyo event syncs require at least an email address or Klaviyo ID to be captured properly. If you're using an external ID, you'll need to ensure that the email address is also provided in the event payload. Using phone numbers as identifiers does not work reliably in some cases depending on how Klaviyo is configured.

🚑 Need help connecting to Klaviyo?

You can send our support team an email at support@getcensus.com or start a conversation from the in-app chat.

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