Klaviyo vs Brevo (Sendinblue): Which Is Better?

Quick answer: Klaviyo and Brevo (formerly Sendinblue) suit different priorities. Brevo bills by emails sent, not contacts, so it’s dramatically cheaper for budget-conscious or low-frequency senders (~$29/mo vs ~$150/mo at 10k contacts). Klaviyo costs more but offers far deeper ecommerce flows, predictive analytics, and segmentation. If email is a high-frequency revenue engine, Klaviyo wins; if you’re watching budget and send occasionally, Brevo is the value pick.

Key takeaways

• Brevo bills by emails sent, Klaviyo by stored contacts — a big difference at scale.
• Brevo is far cheaper; Klaviyo is far deeper for ecommerce.
• Klaviyo’s predictive analytics and flows are the gap Brevo can’t match.
• Choose on whether email is a revenue engine or a cost to minimize.

Weighing Klaviyo against Brevo? Here’s the honest comparison. For the wider field, see the best Klaviyo alternatives.

Quick verdict

If your store treats email as a serious, high-frequency revenue channel, Klaviyo — its flows and data earn back the premium. If you’re budget-conscious, send less often, or want a cheap multichannel generalist, Brevo is the rational, far-cheaper choice.

Pricing: the budget angle

The headline difference is the billing model. Brevo charges by emails sent, so a large list you email infrequently costs little — around $29/month for 40k sends versus roughly $150/month for Klaviyo at 10k contacts. If you store a big list but send sparingly, Brevo’s model is far kinder to your budget. Full cost mechanics in our Klaviyo pricing guide.

Ecommerce features

This is where Klaviyo pulls ahead. Klaviyo offers 60+ prebuilt ecommerce flows, real-time behavioral data, review-app sync, and predictive analytics (CLV, churn, next-order). Brevo covers the basics — email, SMS, some automation — but its ecommerce depth and segmentation are lighter. For a store optimizing revenue per email, that depth is the whole point.

Automation and deliverability

Both run automations and handle deliverability competently. Klaviyo’s flow builder is purpose-built for ecommerce journeys with conditional splits and predictive timing; Brevo’s is more general-purpose. On deliverability, discipline matters more than platform — authenticate your domain and send to engaged people on either tool (see our deliverability guide).

Who should pick which?

• Choose Klaviyo if: email/SMS is a core revenue channel, you want deep ecommerce flows and predictive data, and the ROI justifies the spend.
• Choose Brevo if: you’re budget-first, send infrequently, or want a cheap multichannel tool and can live with lighter ecommerce features.

Many brands start on Brevo and migrate to Klaviyo as email becomes a bigger revenue driver — a migration we handle regularly.

Frequently asked questions

Is Klaviyo or Brevo cheaper?

Brevo is usually much cheaper because it bills by emails sent, not contacts — roughly $29/month for 40k sends versus about $150/month for Klaviyo at 10k contacts. Klaviyo costs more but offers deeper ecommerce features.

What’s the main difference between Klaviyo and Brevo?

The billing model and the depth. Brevo charges per email sent and is a budget multichannel generalist; Klaviyo charges per stored contact and is a deep, ecommerce-specialized platform with predictive analytics and 60+ prebuilt flows.

Should I switch from Brevo to Klaviyo?

Switch when email becomes a meaningful revenue channel and you want the deeper flows, segmentation, and predictive analytics. If you send infrequently and budget is the priority, staying on Brevo can be the rational choice.

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About the author

Ravinder is the founder of Excelohunt, a Klaviyo-focused email & SMS agency. We migrate brands from budget ESPs to Klaviyo as they scale.

Outgrowing a budget ESP? We’ll migrate you to Klaviyo.