Cartful + Klaviyo

Does Cartful integrate with Klaviyo?

Yes. Cartful has a native Klaviyo integration that sends quiz outcomes, answers, and product recommendations directly to Klaviyo profiles and metric events. It works on all platforms.

Why this matters for Klaviyo users

Most Klaviyo flows and segments rely on behavioral data: what someone browsed, what they bought, how they engaged with emails. That data is useful, but it tells you what a shopper did, not what they actually want.

Quiz data is different. It captures structured, declared intent (zero-party data): what the shopper is looking for, what constraints they have, what their preferences are. When that intent flows into Klaviyo as profile properties and metric events, you can build flows and segments based on what the shopper told you rather than what you inferred from clicks.

That makes post-quiz emails more relevant, segmentation more precise, and the data more durable (it does not decay the way browse behavior does).

What this integration does

When a shopper completes a quiz and submits their email, Cartful sends two things to Klaviyo:

1. A metric event called “Quiz Completed” — containing the quiz name, the shopper’s questions and answers, and the recommended products.
2. Profile properties — the shopper’s email, name (if captured), quiz source, and quiz questions and answers as custom properties.

This means you can trigger flows from the event and build segments from the profile data.

What you can do with it

Trigger post-quiz flows

The most common use case: a Klaviyo flow triggered by the “Quiz Completed” event that sends the shopper an email with their recommended products. This is the highest-leverage way to recover shoppers who don’t convert on-site.

Build segments from quiz answers

Quiz answers are written as custom profile properties, so you can build Klaviyo segments based on what shoppers said — their preferences, constraints, goals, or intended use case — and target campaigns accordingly.

Branch flows based on specific answers

You can branch a triggered flow based on quiz answer properties. For example, one brand in the jewelry/gift space branches on “Is this product for you or as a gift?” — sending a different email to gift shoppers versus those buying for themselves, each with tailored product recommendations.

How it works (setup)

1. Get your Klaviyo API key from your Klaviyo account settings.
2. Connect Klaviyo in Cartful Studio — paste the API key in the integration settings.
3. Enable the Klaviyo plugin within the quiz you want to connect.
4. Test it — run a quiz session, submit an email, and confirm the “Quiz Completed” event and profile properties appear in Klaviyo.

Customers can set this up entirely self-service. For enterprise onboarding or teams using add-on support hours, Cartful can configure it for you.

Data mapping

Cartful	Klaviyo	Notes
Email (from email modal)	Profile: email	Required. Nothing syncs without an email.
First name (if captured)	Profile: firstName	Standard property.
Last name (if captured)	Profile: lastName	Standard property.
Quiz source	Profile: source (custom)	Identifies which quiz the data came from.
Quiz questions and answers	Profile: custom properties + event payload	Written to both. Overwritten on retake.
Recommended products	Event payload (Quiz Completed)	Included alongside quiz name and Q&A.

Identification

Cartful identifies the person in Klaviyo using the email captured in the quiz email modal. No other identifier (Klaviyo cookie, Shopify customer ID, etc.) is used.

If a shopper does not submit their email, nothing is sent to Klaviyo.

Good to know

• Email required. No data syncs without an email submission.
• Forward-only. Historical quiz data cannot be backfilled. Data flows from the moment the integration is active.
• Overwrite on retake. When a shopper retakes a quiz, profile properties are overwritten with the latest values. A new “Quiz Completed” metric event is also created.
• No rate limits on Cartful’s side. Any applicable limits come from your Klaviyo plan.
• No intentional latency. Data is sent immediately after email submission.

Platform support

The Klaviyo integration is platform-agnostic. It works on Shopify, Shopify Plus, SFCC, and any other stack because it does not rely on any platform-specific mechanisms.

No specific Klaviyo plan or tier is required for the integration to function.

Common setup questions

Customers sometimes need help with two things during setup:

• Finding the Klaviyo API key — it’s in Klaviyo account settings, but the exact location can be hard to find.
• Understanding what syncs by default — the integration sends both the metric event and profile properties automatically once the plugin is enabled; no additional mapping configuration is required.

See: Integrations hub · Product