Email Marketing8 min read

Best Email Marketing Tools for Ecommerce Retention: Klaviyo vs Mailchimp vs Brevo

Klaviyo, Mailchimp and Brevo compared for ecommerce: automation, segmentation, SMS, pricing and which one drives the most repeat revenue.

Key Takeaways

→Email is still the highest-ROI retention channel for ecommerce, often 25–40% of store revenue.
→Klaviyo leads for Shopify brands that want deep segmentation on purchase data.
→Brevo is the budget-friendly option, priced by emails sent rather than contacts.
→Mailchimp suits simple newsletters and small catalogues but gets expensive for complex automation.
→Five flows — welcome, abandoned cart, browse abandonment, post-purchase and win-back — generate most automated revenue.

Tools in This Comparison

Klaviyo

Brevo

Mailchimp

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Why the email platform matters for retention

Acquiring a customer costs five to seven times more than keeping one. Your email platform decides how precisely you can talk to existing customers: who bought twice, who is about to churn, who only buys on discount. That precision is where repeat revenue comes from.

Quick comparison

Platform	Best for	Pricing model	Starting price (2026, approx.)
Klaviyo	Shopify and DTC brands	Per contact	Free up to 250 contacts, then from ~$20/month
Brevo	Budget-conscious stores, EU businesses	Per email sent	Free tier, paid from ~$9/month
Mailchimp	Simple newsletters	Per contact	Free tier, paid from ~$13/month

Klaviyo: built for ecommerce data

Klaviyo syncs every order, product view and cart event from your store, so you can segment by predicted lifetime value, churn risk or product category. Its benchmarks show how your flows perform against similar brands.

Predictive analytics: next order date and churn risk per customer.
Email and SMS in the same flows.
Native integrations with Shopify, WooCommerce and Magento.

Brevo: more emails for less

Brevo charges by volume sent, not list size, which is attractive for large lists with infrequent sends. It includes email, SMS, WhatsApp and a simple CRM, and is EU-based — useful for GDPR-sensitive businesses in Portugal and Lithuania.

Mailchimp: familiar and simple

Mailchimp is easy to learn and fine for newsletters. For advanced ecommerce automation and segmentation, costs and limitations grow quickly compared with Klaviyo.

The five flows every store needs

Welcome series: 3–4 emails introducing the brand and best-sellers.
Abandoned cart: reminder within 1 hour, follow-up at 24 hours.
Browse abandonment: products viewed but not added to cart.
Post-purchase: thank you, usage tips, review request, cross-sell.
Win-back: customers past their expected reorder date.

Which should you choose?

Your situation	Pick
Shopify store growing past €20k/month	Klaviyo
Large list, tight budget, EU focus	Brevo
Simple newsletter, few products	Mailchimp

Conclusion

The best platform is the one whose data lets you treat loyal customers differently from one-time buyers. For most growing stores that is Klaviyo; for budget-focused teams, Brevo. Learn how we build retention programmes on our email marketing and customer retention pages.