The biggest difference between Brevo and Klaviyo is what they optimize for: Brevo positions itself as an easy-to-use, all-in-one CRM suite that unifies the customer journey across channels, while Klaviyo positions itself as a data-first B2C CRM designed to turn rich customer data into highly personalized marketing. If your priority is a broader, unified workspace for customer engagement, Brevo leans that way; if your priority is deeper data-driven targeting and lifecycle automation, Klaviyo leans that way.
That split exists because Brevo evolved from email marketing into a broader CRM suite (formerly Sendinblue), emphasizing a single platform view of the customer journey, while Klaviyo started in 2012 as a customer database built to solve the “customer data problem” and then expanded into marketing automation, analytics, and service around its built-in data platform. In practice, Brevo’s product bets favor breadth and accessibility, whereas Klaviyo’s bets favor depth in customer data unification and activation.
For buyers, this difference shapes how much of your growth motion can run on unified customer profiles versus how much your team relies on an all-in-one suite to keep work consolidated. Expect the rest of this comparison to dig into how each approach affects automation sophistication, segmentation depth, omnichannel coordination, and the day-to-day operating overhead required to keep data, campaigns, and customer touchpoints aligned.