FERMÀT supports native Klaviyo integrations using your Site ID and Public API Key. This setup allows you to sync lead capture events from FERMÀT funnels into your Klaviyo flows automatically—no code or custom setup required.
What’s in this guide:
What You’ll Need From Klaviyo
To complete setup, gather the following from your Klaviyo dashboard:
Site ID (formerly Public API Key)
Found under Account → Settings → API Keys → Public API Key
Make sure the list or form you’re passing leads to is live and set to collect subscribers.
Connecting Klaviyo in FERMÀT
Go to Funnels → [Select Funnel] → Settings → Email & SMS Popups
Click Email & SMS Capture
Select Klaviyo from the Retention Platform dropdown
Paste your Site ID / Public API Key in the field provided
Click Submit, then Done
Leads captured through native FERMÀT forms will now sync directly to your Klaviyo account.
Where Leads Are Sent
All leads will appear under your selected Klaviyo list associated with the API key. You can trigger flows, segment contacts, and start automations based on this source.

