Klaviyo integration

Klaviyo in Polar: email and SMS revenue that's actually real.

Connect Klaviyo and campaigns, flows, subscriber growth, segments and attributed revenue flow into Polar, stitched to real Shopify orders. Polar re-attributes that revenue with its own first-party Pixel and de-duplicates it against paid and organic, so email stops double-counting orders other channels also claim. And with the Klaviyo Flow Enricher and audience activation, Polar sends first-party events and segments back to Klaviyo too.

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Connect Klaviyo See the setup
Google Sheets → Polar

What you can bring in

Campaigns & flows
"What did email actually earn?"
Campaigns, flows and segment revenue from Klaviyo, one row per campaign and flow, stitched to real orders.
per campaign & flow
Re-attributed revenue
"Klaviyo over-credits itself."
Polar re-attributes with its own first-party Pixel and de-duplicates against paid and organic.
deduped vs reported
Subscriber growth
"How is my list actually growing?"
Subscriber growth and segment performance, blended into your reporting.
list growth
Flow Enricher
"Can I feed Klaviyo better events?"
Send first-party events, product viewed, added to cart, checkout started, back to Klaviyo.
events -> Klaviyo
Audience activation
"Can I sync a Polar segment to Klaviyo?"
Build a segment in Polar and activate it straight into Klaviyo for targeting.
segments -> Klaviyo
Blended P&L
"Where does email sit against everything?"
Attributed email and SMS revenue blended into contribution margin and net profit.
blended into P&L

Klaviyo counts every click as its own. Polar counts what's real.

Klaviyo reports the revenue it can attribute on last-click, which means it claims orders that paid and organic also claim, and it cannot see the rest of your stack. So email always looks like a hero. Polar re-attributes it against the truth.

Klaviyo on its own

  • Revenue is Klaviyo's last-click number, so it over-credits itself.
  • Email sits apart from paid, organic and the store.
  • No de-duplication against orders other channels also claim.
  • One-directional: no clean way to feed Klaviyo first-party events.

Klaviyo with Polar

  • Revenue re-attributed with Polar's first-party Pixel, de-duplicated.
  • Email and SMS blended next to paid, organic and Shopify on one P&L.
  • Orders claimed by multiple channels are de-duplicated, so the number is real.
  • The Flow Enricher and audience activation send first-party data back to Klaviyo.
Setup Guide

Connect Klaviyo, both ways.

01 · What you need
Polar

A Polar account with Shopify

A Polar account with Shopify connected. This connector plugs in right next to your stack.

Connect your data →

A Klaviyo API key

A read-only Private API Key from Klaviyo with the accounts scope. Paste it into Polar and it backfills your history automatically.

Open Klaviyo →

The Polar Pixel

Polar's first-party Pixel is what re-attributes Klaviyo revenue and de-duplicates it against paid and organic.

02 · Connect Klaviyo
1

Connect with one API key ~2 min

Read-only Private key, accounts scope.
Paste a read-only Private API Key from Klaviyo with the accounts scope into Polar, and it backfills your history automatically, campaigns, flows, segments and subscriber growth.
2

Re-attributed and deduped automatic

Real revenue, not self-credit.
Polar re-attributes Klaviyo revenue with its own first-party Pixel and de-duplicates it against paid and organic, so email stops double-counting orders other channels also claim.
3

Send data back optional

Flow Enricher + audiences.
Turn on the Klaviyo Flow Enricher to send first-party events (product viewed, added to cart, checkout started) to Klaviyo, and activate audience segments from Polar straight into Klaviyo.
Get started

Email revenue, deduped and real, both ways.

Paste one API key to pull Klaviyo in, and turn on the Flow Enricher and audience activation to send first-party data back.

Book a demo Connect your data ↗
The Gap

The connector is only half of it.

Once your Klaviyo campaigns, flows and revenue are clean and attributed inside Polar, you can use them wherever you already work. Ask Polar in plain language, pull them live through the Polar MCP, or schedule a snapshot into the report your team reads every morning.

Klaviyo

campaigns, flows, segments
Polar

Polar

deduped, attributed revenue

Ask Polar

Polar MCP

Scheduled reports

Featured Use Case

Email revenue, de-duplicated.

Email revenue, de-duplicated

Klaviyo will always tell you email is your best channel, because it counts every order it can attribute on last-click, including the ones paid and organic also count. That double-counting makes email look like a hero and quietly inflates the number your team plans around. Polar pulls Klaviyo's campaigns, flows and segments, stitches them to real Shopify orders, and re-attributes the revenue with its own first-party Pixel, de-duplicated against every other channel. What you get is email and SMS revenue you can actually trust, blended into contribution margin and net profit. And it runs both ways: the Klaviyo Flow Enricher sends first-party events back to Klaviyo, and you can activate a Polar-built segment straight into Klaviyo for targeting.

What makes it real

Re-attributed, not self-reported. Polar's first-party Pixel re-attributes Klaviyo revenue and de-duplicates it against paid and organic.

Runs both ways. The Flow Enricher pushes first-party events to Klaviyo, and audience segments activate from Polar into Klaviyo.

Ask Polar, in plain language. “What's my real Klaviyo-attributed revenue, flow versus campaign, after dedup?” No SQL, no export.

See how the attributed view works
Other Use Cases

Other use cases

Use case 01

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See the use case › Use case 02

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See the use case › Use case 03

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Placeholder. The use case skill fills this. (rung: analyze it)

See the use case › Use case 04

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See the use case › Use case 05

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See the use case ›
Your Prompt Library

Klaviyo in plain language

A scannable wall of sample prompts for your Klaviyo data inside Polar. Ask Polar, or Claude with the Polar MCP connected.
See it
Show my Klaviyo campaign and flow revenue for the last 30 days.
Break down email and SMS revenue by flow this month.
Show my subscriber growth and best segments.
Analyze it
Compare Klaviyo-reported revenue to Polar-attributed after dedup.
Show blended CAC and email's real share of revenue.
Which flows drive the most revenue per recipient?
How much of Klaviyo's revenue is double-counted by paid and organic?
Decide from it
Which flows deserve more investment based on real attributed revenue?
Should I build a win-back segment, and how big is it in Polar?
Summarize how email performance changed since last month, deduped.
Get started · connect once · deduped both ways

Email revenue you can trust.

Paste one API key to pull Klaviyo in, let Polar re-attribute and de-duplicate the revenue, and send first-party events and segments back with the Flow Enricher and audience activation.

Get started by booking a demo Connect your data in Polar
Phase 1 ~2 minConnect with an API keyPaste a read-only Private key and backfill your history.
Phase 2 automaticRe-attributed and dedupedPolar re-attributes with its Pixel and de-duplicates against every channel.
Phase 3 optionalSend data backFlow Enricher events and audience segments activate into Klaviyo.