While Klaviyo does not have a built-in integration with WisePops, you can still integrate your WisePops account with Klaviyo. This is possible via an integration available through WisePops.
Before you get started, you must already have existing lists in your Klaviyo account. You will also be asked to enter your Klaviyo API key. Here, you'll need to generate a Private API Key in Klaviyo instead of using your public API key / Site ID. You can generate a Private API Key by navigating to Account > Settings > API Keys.
Sync a WisePops Form to Klaviyo
After you have created a sign-up form in WisePops, you are only a few clicks away from integrating this form with Klaviyo.
First, navigate to your sign-up form in WisePops. Find the signup box and click Edit.
In the Edit window, you will see an option to Sync your pop-up.
Click on this option and you will see Klaviyo under the Email Platforms section.
You will be prompted to enter in your Klaviyo API Key next. Here, you'll need to generate a Private API Key in Klaviyo instead of using your public API key / Site ID. You can generate a Private API Key by navigating to Account > Settings > API Keys.
After entering in your generated Private API Key, your form will officially be linked to Klaviyo! Next, however, you have to choose which Klaviyo list you'd like new subscribers to join.
This is the final step - after selecting a list from the dropdown menu, new subscribers opting-in through your WisePops form should automatically sync to Klaviyo.