> ## Documentation Index
> Fetch the complete documentation index at: https://fromhazel.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Klaviyo Analytics: Email and SMS Performance

> Klaviyo integration pulls email and SMS campaigns, flow revenue, subscriber growth, and attribution data into Hazel for lifecycle analysis.

## Overview

Klaviyo is where most consumer brands run their email and SMS marketing. Connect it to Hazel and you can analyze campaign performance, flow revenue, subscriber growth, and more — all alongside your Shopify and ad data.

## What Hazel pulls

Once you connect Klaviyo, Hazel has access to:

* **Campaigns** — every email and SMS campaign with open rates, click rates, and revenue
* **Flows** — automated sequences like welcome series, abandoned cart, and post-purchase flows
* **Messages** — individual sends with delivery, open, click, and conversion data
* **Events** — subscriber activity like opens, clicks, and purchases attributed to Klaviyo
* **Subscribers** — your full subscriber list with profile data and engagement history
* **Lists and segments** — how your audience is organized
* **Revenue attribution** — how much revenue each email, SMS, campaign, and flow generates

## How to connect

Find Klaviyo in the [Hazel marketplace](https://app.fromhazel.ai/integrations/marketplace?search=klaviyo) and click the **+** button. You'll sign in through Klaviyo in a popup window to authorize Hazel.

**What you'll need:** A Klaviyo account with admin access.

## Example questions you can ask

Once your Klaviyo data is connected, try questions like these:

* "What percentage of our revenue comes from email?"
* "Show me our top performing flows by revenue"
* "How are our email open rates trending?"
* "Compare email vs SMS performance this quarter"
* "Which campaigns had the highest click rate?"
* "What's our subscriber growth rate over the last 6 months?"

## Good to know

<Note>
  **Revenue attribution** is one of the most valuable parts of this integration. It lets you see exactly how much revenue each email and flow generates — so you know what's actually driving sales.
</Note>

* Hazel pulls both email and SMS data from Klaviyo.
* Pair with Shopify to compare Klaviyo-attributed revenue against total store revenue.
* **SMS doesn't have "open" rates** — unlike email, there's no way to track whether someone opened a text message. SMS engagement starts with clicks.
* **Attribution windows** — by default, Klaviyo attributes revenue within a 5-day window for email and a 1-day window for SMS. Keep this in mind when comparing Klaviyo revenue numbers to other sources.
* Your data refreshes roughly every 6 hours.

<Tip>
  **Ready to connect?** Head to the [Hazel marketplace](https://app.fromhazel.ai/integrations/marketplace) to get started. Need help? Reach out via your shared Slack channel or [contact support](/docs/resources/contact-support).
</Tip>