Brevo (formerly Sendinblue) is a versatile tool to start with, offering an appealing free plan and features that go beyond email. But as an ecommerce brand grows, that all-purpose versatility starts to show its limits: it lacks deep Shopify integration, purchase-behaviour segmentation and the ecommerce flows Klaviyo has mastered. That is why so many brands make the switch.
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 email platforms is not just exporting a list of contacts. It means moving your entire marketing 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.
We are Klaviyo Agency Partners, a certification that reflects our experience building email marketing and automation programmes in Klaviyo. In a migration project, that recognition translates into a concrete advantage: we run the move safeguarding the most delicate asset in your channel, deliverability, with direct technical backing from 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 Brevo, 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 Brevo. The risk only appears when everything is imported without judgement and sending starts at full volume on day one.
The key difference is focus. Brevo is a generalist marketing and CRM platform serving many kinds of business, while Klaviyo is built specifically for ecommerce. That shows most in the Shopify integration (native and deep in Klaviyo, more limited in Brevo) and in purchase-behaviour segmentation, which is considerably more advanced in Klaviyo. For an ecommerce brand that takes retention seriously, that specialisation translates into more revenue from the channel.
Yes, though rather than migrating them we rebuild them. Brevo automations are recreated as Klaviyo flows, improving them along the way with the purchase-behaviour segmentation Brevo does not offer. The result is not a copy of what you had, but a stronger version of your automation programme, designed specifically for ecommerce.
Klaviyo usually costs more than Brevo, particularly against Brevo’s free plan. 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-specific flows and its native 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 automations to rebuild and the complexity of the segmentation. A standard Brevo 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.
