Question 1

Why does everyone in ecommerce use klaviyo instead of mailchimp?

Accepted Answer

The short answer is that Klaviyo was designed specifically around purchase data, and Mailchimp was not. That difference in original intent shows up in almost every part of how the two tools work.

When an e-commerce store connects to Klaviyo, the integration isn't just about syncing email addresses. Klaviyo pulls in order history, product catalog data, purchase value, browsing behavior, cart events, and refund activity. That data sits natively inside the platform and becomes immediately available as segmentation criteria and automation triggers. A segment of customers who bought from a specific product category more than twice but haven't purchased in 90 days is a few clicks to build, not a data engineering project. That depth of purchase-aware logic is what e-commerce marketers are usually referring to when they explain why they use Klaviyo.

Mailchimp has added e-commerce integrations over the years, and for a basic store sending occasional promotional emails the gap has narrowed. But the structural difference is that Mailchimp was built as an email sender that added store connections, while Klaviyo was built as a revenue intelligence layer that outputs email and SMS. The automation templates that come with Klaviyo — abandoned cart, browse abandonment, post-purchase sequences, win-back flows — are pre-wired to order and product data in ways that would require significantly more setup to replicate from scratch in a general-purpose email tool.

The revenue attribution view also tends to resonate with e-commerce teams. Klaviyo attributes revenue to flows and campaigns and surfaces it as a primary dashboard metric, not a secondary report. For a marketing team being measured on revenue generated per email send, that framing aligns with how they're already thinking about performance.

There are honest caveats to name here. Klaviyo is meaningfully more expensive than Mailchimp at comparable contact counts, and the pricing scales with list size in ways that can surprise growing brands. The platform is also relatively complex, and teams without someone who has used it before may spend longer in the setup and learning phase than they expect. For a brand doing under a few thousand dollars a month in revenue, the cost-benefit analysis often doesn't favor Klaviyo's pricing tier.

The fit is strongest for brands where email and SMS are actively driving repeat purchase revenue, where segmentation based on purchase behavior matters, and where the marketing team has the bandwidth to build and test multiple automated flows. In those conditions, the native data model justifies the cost difference. For a very small store sending one newsletter a month, a lighter tool at a lower price point is probably the more practical starting place, with Klaviyo as a natural migration as volume and complexity grow.

Question 2

Does klaviyo handle SMS as well as email or is email still better?

Accepted Answer

Klaviyo handles SMS as a first-class channel within the same platform rather than as a bolt-on integration, which is one of the things that distinguishes it from tools where SMS feels like an afterthought added after the email product was already mature.

The key advantage of managing both channels inside Klaviyo is that the same contact profile, the same segmentation logic, and the same behavioral triggers drive both email and SMS decisions. A customer who abandoned a cart can receive an email an hour later and an SMS the following morning without that coordination requiring two separate platforms, two separate audiences, or manual syncing. The suppression logic also works cross-channel, so a contact who unsubscribes from SMS doesn't continue receiving SMS messages even if they're still active on email, and compliance state is tracked centrally rather than split across tools.

The flow builder treats SMS messages as nodes in the same canvas as email steps, which means a B2C brand can design a post-purchase sequence that delivers a confirmation email immediately, a product education SMS three days later, and a review request email at day seven — all within one flow, with shared conditional logic. That unified canvas approach reduces the operational overhead of running two channels simultaneously.

SMS in Klaviyo is available in a growing list of countries, though coverage varies and some features are limited to US and Canadian numbers depending on the carrier agreements and regulatory environment at the time. Toll-free numbers, short codes, and 10DLC registration for US senders are all handled through the platform, though the registration and approval process for certain number types can take longer than teams expect and is largely determined by carrier timelines outside Klaviyo's control.

Pricing for SMS is separate from the email plan and is typically charged on a per-message basis or through credit bundles depending on your plan structure. At meaningful send volumes, SMS costs add up quickly relative to email, so brands with very large lists should model out projected SMS spend before assuming the combined platform is cost-neutral. List growth for SMS also requires explicit opt-in under TCPA and similar regulations, which typically means smaller SMS audiences than email audiences for the same brand.

Where the SMS capability in Klaviyo tends to perform best is in time-sensitive or high-intent moments — a flash sale alert, a cart recovery nudge, a shipping update. The open rate differential between SMS and email is real in most contexts, and for those specific trigger points the incremental revenue often justifies the per-message cost. For ongoing educational content or lower-urgency communication, the same message through email is usually the more cost-efficient path.

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Why does everyone in ecommerce use klaviyo instead of mailchimp?

Does klaviyo handle SMS as well as email or is email still better?