Klaviyo is the premium destination for e-commerce marketers who have outgrown Omnisend. If you need deeper revenue attribution, more sophisticated segmentation, or stronger Shopify integration, Klaviyo is the step up.
This guide covers everything you need to migrate from Omnisend to Klaviyo without losing subscribers or breaking your automations. Estimated time: half a day to a full day.
What transfers and what does not
| Item | Transfers? | Notes |
|---|---|---|
| Contacts and email addresses | Yes | Via CSV export/import |
| Tags and segments | Partial | Export as custom fields, remap on import |
| Custom field data | Partial | Transfers if mapped correctly during import |
| Unsubscribe history | Yes | Import as suppressed contacts |
| Email templates | No | Need to be rebuilt in Klaviyo |
| Automation workflows | No | Need to be rebuilt from scratch |
| Campaign history | No | Historical stats stay in Omnisend |
Step-by-step migration guide
Sign up at www.klaviyo.com before doing anything else. Keep your Omnisend account running throughout the migration: do not cancel it until everything is confirmed working in Klaviyo.
Add your domain to Klaviyo and follow the DKIM authentication instructions. This improves deliverability and ensures your emails arrive in inboxes, not spam folders. Complete this before importing any contacts.
In Omnisend, go to your audience and export your full contact list as a CSV. Make sure to include all custom fields, tags, and segments. Export your unsubscribed contacts separately: you will need to suppress these in Klaviyo to stay compliant.
Upload your CSV into Klaviyo and map each column to the correct field. Import your unsubscribed contacts as suppressed. Review the import report carefully before proceeding: fix any mapping errors before building automations.
Screenshot or document all your active automations in Omnisend before rebuilding them in Klaviyo. Start with your highest-priority flows: typically your welcome series and any active nurture sequences. Do not activate them until you have tested them with your own email address.
Build your signup forms in Klaviyo and replace the Omnisend embed codes on your website. Test each form to confirm subscribers land in the right list and trigger the correct automation.
Send a test campaign to yourself. Trigger your automations manually. Check every link. Confirm your unsubscribe flow works correctly. Only cancel Omnisend once you are fully satisfied that Klaviyo is working as expected.
Once Klaviyo is fully operational, cancel your Omnisend account. Check your billing date to avoid being charged for another month. Download any historical reports or data you want to keep before cancelling.
The bottom line
Klaviyo is worth the migration if you are a serious e-commerce operator who needs the best segmentation and revenue attribution available. It is more expensive than Omnisend but the depth is greater.
Not sure Klaviyo is the right destination? Take the Marketing Automation Buyer's Guide quiz for a personalized recommendation.