Insights Guide

Klaviyo vs Omnisend for Shopify stores over $2M: an agency's view after running both

For a Shopify store under $1M a year with a simple catalogue, Omnisend is cheaper and good enough; we tell those stores to stay. Over $2M, with a catalogue that has sizes, brands or replenishment cycles and a team that reads reports, Klaviyo earns its higher price through its data model (every Shopify event, every product property, usable in segments and flows), its predictive and RFM segmentation, its flow builder and its reporting. We work in Klaviyo only and migrate stores from Omnisend as part of our Setup; a migration takes 2 to 4 weeks and costs about a month of the Setup fee. The decision is about data and the team, not about features lists.

By Ihor Poltavtsev · Published November 7, 2026

Our bias, stated

EMMPA works in Klaviyo only. We chose it in 2022 because it is where the Shopify data is richest and where our team’s ten years of knowledge compounds, and we migrate stores off Omnisend as part of our Setup. So read this as the view of a specialist, not a neutral reviewer. The useful part is that we say when Omnisend is the right answer, because taking those stores on would cost us money.

Where Omnisend wins

If that is you, stay on Omnisend and come back when the business changes.

Where Klaviyo pays for itself

  1. The data model. Klaviyo stores every Shopify event with its full payload (product, variant, collection, price, properties) and every customer property, and lets you segment and trigger on any of it. “Viewed a size 9 boot in the last 7 days, has not bought, lives in the US” is a segment you build in a minute. For the flow logic in our fashion, resale and home decor guides, this is the difference between a template and a program.
  2. Predictive and RFM segmentation. Expected next order date, predicted lifetime value, churn risk, RFM groups, computed for you and usable in flows. Replenishment on the predicted date beats replenishment on a fixed delay.
  3. Flow builder and testing. Conditional splits on any property, A/B at any step, flow-level revenue per recipient. Our benchmark median of $1.07 per flow recipient and the $7.49 on the rug store come from flows that branch; a linear flow does not get there.
  4. Reporting that a founder reads. Attributed revenue by flow and campaign, revenue per recipient, benchmarks by industry inside the product, and an API that lets an agency build the monthly report you actually want.
  5. The ecosystem. Reviews, loyalty, subscriptions, helpdesk and CDP integrations are built against Klaviyo first. Over $2M, you will use three of them.

What the migration involves

Inside our Setup, an Omnisend to Klaviyo move takes 2 to 4 weeks:

The cost sits inside the one-time Setup ($1,500); there is no separate migration fee. The risk is a dip in deliverability during warm-up; the schedule is designed to keep it small.

The decision in one table

QuestionOmnisendKlaviyo
Store under $1M, simple catalogue, small teamStayNot worth it
$1M to $2M, growing catalogue, nobody reads reports yetStay for nowPlan the move when a marketer joins
Over $2M, sizes or brands or replenishment, someone owns emailCosts more than it savesMove
Over $2M, planning loyalty, reviews or subscriptions integrationsMoveMove

If you are over $2M and still on Omnisend

The free 30-minute audit reads your Omnisend account and your Shopify data and tells you whether the move would change the number, with an estimate of what email could bring in Klaviyo for a store like yours (our Klaviyo stores sit at a median 22% of revenue from email). If the answer is “stay”, we say so on the call.

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