Mailchimp is a good tool to start with, but it falls short once an ecommerce brand needs advanced segmentation, flows built on purchase behaviour and deep Shopify integration. That is why so many brands move to Klaviyo, the most capable email marketing platform for ecommerce.
Done properly, the migration multiplies what the channel produces. Done badly, it can damage your deliverability for months. At STRAT, as an official Klaviyo Agency Partner, we handle the full migration while preserving subscribers, history and sending reputation.
Migrating platforms is not just exporting a list of email addresses. It means moving your entire email programme while protecting your sending reputation. This is what we migrate in full.
The most valuable and most fragile asset in your email marketing is deliverability: the reputation that decides whether your emails land in the inbox or in spam. A badly handled migration (importing inactive contacts without cleaning, ignoring suppressions, or sending at full volume from day one without warming the domain) can damage that reputation for months. Recovering lost deliverability is slow and expensive, and in the meantime your campaigns are not arriving. That is why an email platform migration is not a simple transfer of lists: it is a process that protects the most profitable channel in your business.
As an official Klaviyo Agency Partner, STRAT is recognised for designing and implementing high-performance email marketing and automation programmes in Klaviyo. That partnership is not decorative: in a migration it is a direct guarantee that the project is run protecting the most sensitive part of your channel, deliverability, with official technical knowledge of the platform.
Verify our credentials in the official Klaviyo Partners directory.
We are not an agency that also happens to do email. We work exclusively with ecommerce and email marketing is one of our core pillars. As an official Klaviyo Agency Partner, we have run migrations that preserved what actually matters: deliverability, valid subscribers and the performance of the channel.
And we do not simply move you across: we use the migration to rebuild your flows better than they were in Mailchimp, leaving your retention programme ready to generate more revenue from the first send. Every decision is made on commercial criteria, not just technical ones.
Not if the migration is done properly. The critical factor is respecting contact statuses (active, inactive, unsubscribed) and managing the sending transition gradually to preserve domain reputation. In fact, a well-executed migration usually improves deliverability, because we take the opportunity to clear out inactive contacts that were damaging your reputation in Mailchimp. The risk only appears when everything is imported without judgement and sending starts at full volume on day one.
Yes, though rather than migrating them we rebuild them. Mailchimp automations are recreated as Klaviyo flows, improving them along the way with the purchase-behaviour segmentation Mailchimp does not offer. The result is not a copy of what you had, but a stronger version of your automation programme.
Klaviyo usually costs more than Mailchimp, but for an ecommerce brand the relevant comparison is not price, it is return. Klaviyo generates more revenue through the depth of its segmentation, its ecommerce flows and its Shopify integration. The right question is not what it costs, but what percentage of additional revenue it contributes. In ecommerce, that return normally justifies the difference in cost.
It depends on the size of the database, the number of flows to rebuild and the complexity of the segmentation. A standard Mailchimp to Klaviyo migration is usually completed in two to five weeks, including audit, data migration, flow rebuilding, Shopify integration and deliverability validation.
No. We manage the transition so your email activity never stops. We keep your operation running while we set up Klaviyo and rebuild the flows, then make the switch gradually, warming up sending on the new platform so neither your deliverability nor your communication with customers is affected.
