Connect Fluent Forms. Send every lead to Klaviyo.

Connect Fluent Forms to Klaviyo

Connect Fluent Forms to Klaviyo and every form submission becomes a profile in the list you choose. The free ClickSyncr for Klaviyo plugin adds a native Fluent Forms integration with per-form feeds: connect your private API key once, pick a list, map your fields, save. So there is no code, and it takes about two minutes per form.

Before you begin

You need three things: the ClickSyncr for Klaviyo plugin activated, Fluent Forms active, and a Klaviyo account (free accounts work) with permission to create a private API key. You store the key once, and every supported builder on the site then shares it.

Get your Klaviyo private API key

1. Log in to Klaviyo and go to Account → Settings → API Keys.
2. Create a private API key with lists:read, lists:write, profiles:write and subscriptions:write access.
3. Copy it and paste it into any ClickSyncr Klaviyo panel. One key serves the whole site, and free Klaviyo accounts work.

Treat the key like a password. Anyone holding it can read and modify your Klaviyo lists and profiles.

Fluent Forms setup, step by step

1. Connect Klaviyo in the global integrations. From Fluent Forms → Integrations, find ClickSyncr Klaviyo and paste your private API key. You connect once for the whole site.
2. Add a Klaviyo feed to your form. Also, edit the form, open Settings & Integrations → Marketing & CRM Integrations, and add a ClickSyncr Klaviyo feed.
3. Choose the Klaviyo list. In fact, the feed’s list picker shows opt-in mode and field counts.
4. Map your form fields. Then pair Email (required), the standard profile fields, and custom properties with your form inputs.
5. Optional: set a consent field. Also, select a checkbox input so ticked submissions subscribe with marketing consent and unticked ones join as non-marketing members.
6. Save the feed. In addition, every new submission now syncs to Klaviyo.

Standard fields and custom properties

Klaviyo identifies profiles by email, so Email is the one required mapping. First name, last name, phone number, organization and title map to Klaviyo’s standard profile fields; every other mapping is stored as a custom property on the profile. Also, ClickSyncr simply skips an unmapped field and never overwrites existing profile data with a blank value.

Subscriber status and double opt-in

Each form chooses a subscriber status: subscribe with marketing consent, add as a non-marketing member only, or Use list setting, which defers to the list’s own single or double opt-in mode. The list picker shows each list’s real opt-in mode, so you know before you choose. A consent field overrides it per submission: ticked subscribes, unticked stores a member without marketing consent. Klaviyo matches profiles by email, so it updates existing profiles instead of duplicating them.

Verify the sync

First, submit the form on the front end (not the admin preview) with a test address you can recognise, filling every mapped field. Then, in Klaviyo, open the list and confirm the profile exists with the mapped values and the consent state you expect. In short, that one minute catches almost every configuration mistake.

Troubleshooting

Does this work with the free Fluent Forms?

Yes. The ClickSyncr Klaviyo integration registers in the free Fluent Forms as a native integration module.

Can one Fluent Forms form have multiple feeds?

The integration follows Fluent Forms’ feed model, so each form’s Klaviyo feed carries its own list and mapping.

Other form builders

ClickSyncr for Klaviyo also connects Contact Form 7 · WPForms · Gravity Forms · Ninja Forms · Formidable Forms · Forminator. Overview, features and pricing: Klaviyo integration for WordPress. Browse all ClickSyncr integrations.

“Klaviyo” is a trademark of its respective owner. ClickSyncr for Klaviyo is an independent integration and is not affiliated with, endorsed by, or sponsored by Klaviyo.

Frequently asked questions

Why can a profile reach the Klaviyo list while consent recording fails?

The Klaviyo client imports the profile, adds list membership, and then requests marketing consent when the chosen status requires it. The final request can fail after the earlier steps succeed. ClickSyncr reports “Added to the list, but recording consent failed” with the error detail. Check that result for your Fluent Forms test and inspect the profile’s subscription state separately from its list membership.

Does an unchecked consent field create a Klaviyo member-only profile?

With the current sending code, an unchecked configured consent field blocks delivery from Fluent Forms. It does not create a new member-only profile for that submission. Member-only status is a separate choice available when no consent field overrides the saved status. Test those cases separately and inspect the recorded result; “Nothing was sent. Consent was not given.” means the submission stopped before the Klaviyo request.

Why can a Klaviyo birthday or age property be missing after a sync?

The plugin validates these property values before sending them. Birthday must be a real date in year-month-day format, and Age must contain a finite numeric value. Invalid values are omitted from the profile request. Check the actual answer submitted by Fluent Forms, not only the mapping label. Use a valid test value, then compare the stored property with the submitted answer.