For an online store, Klaviyo is the stronger revenue tool and Mailchimp is the cheaper, broader all-rounder, and the honest answer to "which one sells more" is that Klaviyo is documented to be built around purchase data while Mailchimp is built for general marketing. If your sales come mostly from a store on Shopify, WooCommerce or BigCommerce and you want flows triggered by what shoppers actually did, Klaviyo is the better documented fit. If you send newsletters, run a small list and want one familiar tool for many jobs, Mailchimp costs less and is easier to start.
That is a pattern across published pricing pages, feature documentation and user reviews, not a result we measured. We did not run a store campaign in either platform, so no revenue figures appear here. What we can do is lay out how each product documents its pricing, its ecommerce features and its limits, so you can match them to your list size and your store.
How We Compared Klaviyo and Mailchimp
We compared the two platforms using each vendor's public pricing and feature pages, third-party price breakdowns and patterns in published reviews from store owners. We priced out three list sizes, 500, 10,000 and 50,000 contacts, and weighed four factors: how deeply each connects to store data, what automation is included, how the price grows with the list, and what reviewers consistently complain about. Third-party sites disagree on some figures, particularly Mailchimp's top tier, so treat every number as a starting point and verify current pricing on both vendors' sites.
Where Klaviyo Pulls Ahead for Stores
Klaviyo documents deep integrations with the major store platforms and builds segments and flows from shopper behavior: who viewed a product, abandoned a cart, bought once, or has not returned. Pre-built flows for abandoned carts, welcome series, browse abandonment and post-purchase follow-ups are the core of the pitch, and reviewers consistently credit them for being the reason ecommerce brands choose it. The product also documents SMS alongside email and reporting that ties campaigns to store revenue.
The documented cost of that depth is price growth. Klaviyo bills on active profiles rather than emails sent, and third-party breakdowns show the monthly bill climbing quickly with list size.
Where Mailchimp Still Makes Sense
Mailchimp documents a broader toolkit: email, landing pages, simple websites, social ads, forms and a light CRM, with templates and an editor that reviewers find approachable for non-specialists. It also documents ecommerce integrations and basic automations, so a small store can run an abandoned-cart email without switching tools. For a creator, a local shop or a store that mostly sends newsletters, that breadth at a lower entry price is a real advantage.
Reviewers criticize Mailchimp for shifting plan limits and for contact counting that can inflate the bill, since sources report a person on several audiences may be counted more than once. Confirm how contacts are counted before importing a large list.
Klaviyo vs Mailchimp Pricing Side by Side
Both platforms document a free tier capped around 250 contacts and 500 sends a month. Past that, third-party breakdowns put Klaviyo's email plan from about $20 a month at 251 to 500 profiles, rising to roughly $150 a month near 10,000 profiles and about $720 near 50,000. Mailchimp's Essentials is listed near $13 a month and Standard near $20 at 500 contacts, with the top Premium tier reported at around $350 a month, though sources disagree on the contact count that figure applies to.
| Factor | Klaviyo | Mailchimp |
|---|---|---|
| Free tier | Documented, about 250 profiles, 500 sends | Documented, about 250 contacts, 500 sends |
| Paid entry at 500 contacts | About $20 a month (verify) | About $13 to $20 a month (verify) |
| At 10,000 contacts | About $150 a month (verify) | Varies by tier, often lower (verify) |
| Store data and flows | Deepest, core strength | Good, lighter |
| Other tools | Email, SMS, reporting | Landing pages, sites, ads, light CRM |
| Best fit | Store where email drives sales | Small list, mixed marketing needs |
For the wider field beyond these two, see our best email marketing software guide.
What Store Owners Consistently Praise and Criticize
Across published reviews, Klaviyo earns praise for segmentation that reflects real purchase history, for flows that run without constant attention, and for reporting that connects emails to orders. The recurring complaints are price growth, a learning curve for people new to flows and segments, and support that is limited on the free tier. Documented free-plan support is time-limited, so a new store should not assume it will have help indefinitely.
Mailchimp earns praise for an approachable editor, a large template library and the convenience of one login for several marketing jobs. Its criticisms run the other way: reviewers say plan structure and limits have shifted over the years, that ecommerce segmentation is shallower than Klaviyo's, and that costs can surprise users who did not realize how contacts are counted. Neither set of complaints is disqualifying, but they point to different kinds of risk. With Klaviyo the risk is a bill that outgrows your margins, and with Mailchimp the risk is hitting a ceiling on what you can automate.
Questions to Ask Before You Commit
Three questions settle most decisions. First, how large is your list today and in twelve months? A list near 10,000 profiles is where the documented price gap becomes real money, so price both platforms at that size, not at 500. Second, does your store platform connect natively to each tool? Both document major integrations, but sync depth and the data available for segments can differ, so check your exact platform. Third, who will build and maintain the flows? Klaviyo's strength rewards someone who will use segments, while a team that only sends occasional newsletters will not use most of what it is paying for.
How to Choose Based on Your Store
Choose Klaviyo if email and SMS are a major sales channel, your catalog and customer data live in a supported store platform, and you are willing to pay more as the list grows in exchange for behavior-based segmentation. Choose Mailchimp if your list is small, your budget is tight, or you want one product for newsletters, landing pages and basic store emails.
A practical middle path is to start on Mailchimp's free or lowest plan, and move to Klaviyo when abandoned-cart and segmentation revenue would clearly exceed the price difference. Both platforms document export of contacts, so switching is possible, though flows and templates must be rebuilt by hand.
The bottom line: Pick Klaviyo if email is a major sales channel for your store and you can afford the profile-based pricing, and pick Mailchimp if you want a cheaper, simpler all-rounder for a smaller list.
