1Click Popups offers a seamless integration with Klaviyo, allowing you to sync leads from your popups directly to your email lists. Follow the steps below to connect your Klaviyo account.

Step 1: Get your Klaviyo API Key

Log in to your Klaviyo account.

Click your avatar (top right) and go to Settings.

Select the Account tab, then click API Keys.

Click Create Private API Key.

Choose Custom Key, then enable the following permissions:


Copy the Private API Key.

Step 2: Connect Klaviyo to your campaign

Open your campaign in 1Click Popups.

Go to the Settings tab, then look for the Integrations section.

Click Add integration.

Choose Klaviyo.

Paste your Private API Key.

Click Refresh and select the Klaviyo list you want to use.

Click Add, then Save.

Done! Klaviyo is now ready to receive emails collected via 1Click Popups.

FAQs

What fields are synced?

We send the following data to Klaviyo:

Email

First name and Last name

Phone number

Custom fields – These are passed as Custom Properties* in Klaviyo. If the property doesn’t already exist, Klaviyo will create it automatically.

What happens if I enable double opt-in in 1Click Popups?

If Double email opt-in is turned on for your campaign:

Contacts will receive a confirmation email from 1Click Popups.

They must click the link in this email to confirm their subscription.

Only confirmed contacts will appear in your Klaviyo list.

Updated on: 31/05/2025