Mailchimp to Klaviyo migration
Move your list, automations, and sending history to Klaviyo without losing data, damaging deliverability, or going dark on your subscribers.
Mailchimp works. But if you're running an e-commerce business with Shopify or WooCommerce and you're serious about email as a revenue channel, you're leaving significant money on the table.
The gap isn't just features — it's data. Klaviyo is built around behavioural and purchase data. Mailchimp isn't. That difference determines what automations you can run, how precisely you can segment, and how much of your revenue email can actually claim credit for.
What the migration covers
Data export and cleaning. We pull everything out of Mailchimp: subscriber list, custom fields, tags, segments, and suppression list. Before we import anything to Klaviyo, we clean the list — removing invalid emails, flagging long-inactive subscribers, and structuring the data to match Klaviyo's contact model.
Suppression list transfer. Your unsubscribes and complaint records come with you. This is non-negotiable for compliance — we make sure every opt-out from Mailchimp is respected in Klaviyo from day one.
Sending domain setup. We configure your sending domain in Klaviyo and set up or verify SPF, DKIM, and DMARC records. If you're moving to a dedicated sending domain (recommended for high-volume senders), we handle that setup.
Flow rebuilding. We don't copy-paste your Mailchimp automations into Klaviyo. We rebuild them to take advantage of Klaviyo's trigger logic — browse abandonment, cart abandonment with dynamic product blocks, post-purchase sequences based on product category. If your Mailchimp automations were simple, this is where you immediately start to see the difference.
Warm-up plan. Moving to a new ESP means starting fresh on sender reputation for that domain. We run a phased warm-up — increasing send volume gradually while monitoring deliverability — so you don't take a reputation hit at the moment you most need performance.
Integration connection. We connect Klaviyo to your Shopify, WooCommerce, or other e-commerce platform and verify that order data, product feeds, and behavioural events are flowing correctly before you send anything.
What you get
A fully operational Klaviyo account with your list clean, your flows rebuilt for Klaviyo's data model, your sending domain authenticated, and a warm-up plan that protects deliverability through the transition. Most brands see improved results within the first month — more from better trigger logic than from any single campaign.
Want to know what a Klaviyo setup should look like at full maturity? Run the free email audit and see how your current program scores. Or if you're ready to talk migration specifics, get in touch — we'll tell you what's involved for your setup.
Not sure where to start?
Take the free 3-minute audit. Ten questions on your automations, deliverability, and segmentation — and a scored breakdown of what to fix first.
Start the free audit →Frequently asked
- Why migrate from Mailchimp to Klaviyo?
- Mailchimp is a generalist tool — it does email reasonably well but lacks the e-commerce data model that makes Klaviyo powerful. Klaviyo ingests order history, browse events, cart activity, and product data natively from Shopify and most major platforms. That data depth unlocks segmentation and trigger logic (browse abandonment, replenishment flows, RFM tiers) that simply aren't available in Mailchimp.
- Will I lose my subscriber data when I migrate?
- No. We export your full subscriber list, custom fields, tags, and suppression list from Mailchimp before anything changes. We clean and restructure the data for Klaviyo's data model, then import it in a way that preserves consent records and unsubscribe history.
- How long does a Mailchimp to Klaviyo migration take?
- Most migrations take 3–4 weeks from kickoff to first send on Klaviyo. The timeline depends on the complexity of your existing automations and the number of segments to recreate. We don't rush the warm-up phase — a proper ramp protects the domain reputation you've built up.
- Do you handle the Klaviyo account setup too?
- Yes. We set up the Klaviyo account, connect the e-commerce integration, configure sending domains and authentication records, rebuild the flow architecture, and run the first few sends. You get a fully operational account, not just a data import.
Let's have a chat.
Tell us a bit about your business and where email is at. We'll come back to you within one business day.
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