Klaviyo vs Mailchimp: which is better in 2026?

Pricing and real cost at scale

Start with the part most comparisons skip: neither of these tools prices on how much you send. Both price on how many contacts you store, and both have billing mechanics that push the real bill above the sticker price. The honest comparison is not $20 versus $13. It is what each platform charges at the list size you will have twelve months from now, and what each one counts as a billable contact.

In our Klaviyo review we read the ladder directly off the live klaviyo.com/pricing calculator in August 2026: $20 per month at 251 to 500 active profiles, $100 at 5,000, $150 at 10,000, $400 at 25,000, and $1,495 at 110,000. Every email tier includes monthly sends equal to 10 times your profile count, so send volume is effectively never the constraint. The constraint is the profile count itself. Since February 18, 2025, Klaviyo requires every account to sit on a plan matching its total active profiles, whether you email those contacts or not, and when your count crosses a tier boundary the plan auto-upgrades at the next billing cycle. Auto-downgrade exists only as an opt-in billing preference for credit-card customers. There is also no annual plan advertised anywhere, so there is no discount for commitment and no rate lock.

Mailchimp’s marketing tiers, verified June 2026 and covered plan by plan in our Mailchimp pricing breakdown, run from $13 per month on Essentials at 500 contacts to $310 on Standard at 25,000, with Premium flat at $350 from 10,000 contacts up. The catch is the definition of a contact: Mailchimp bills on every contact stored in your audience, including people who unsubscribed and people who never subscribed at all, and the same person kept in two audiences is billed twice. Only contacts you manually archive or delete stop costing money. Like Klaviyo, Mailchimp offers no standard annual prepay discount on the marketing plans; the only built-in break is 15 percent for verified nonprofits.

Read across the 10,000-contact row and Mailchimp looks like the cheaper platform: $135 on Standard against Klaviyo’s $150, or $1,620 a year against $1,800. Two things complicate that reading. First, Klaviyo’s $150 includes 100,000 email sends per month; Mailchimp’s Essentials tier caps automations at four steps, which pushes most growing senders onto Standard whether they planned to be there or not. Second, both platforms bill contact bloat. On Mailchimp, unsubscribed and duplicate records quietly inflate the count. On Klaviyo, the problem is the cliffs above 10,000 profiles: 11,500 profiles costs $225 per month and 13,000 costs $300, so a 15 percent larger list can carry a 50 percent larger bill, and the upgrade happens automatically. You can model your own list size and growth rate against both ladders in our real cost calculator.

At 25,000 contacts the gap widens in Mailchimp’s favor on paper, $310 versus $400, with one asterisk: if you want phone support at that size, Mailchimp charges $620 per month for Premium. Klaviyo has no phone-support tier to upsell you into, but its free plan cuts off email support after 60 days, and Mailchimp’s free plan after 30. Neither company is generous once you stop paying.

Automation, segmentation, and attribution

This is where the two products stop being comparable. Klaviyo’s paid plans include revenue attribution, predictive analytics, and real-time segmentation on every tier. The pitch is not that you can build an automation; it is that you can see which flow, campaign, and segment produced which dollars, because the platform is built around order data from Shopify, WooCommerce, BigCommerce, and Magento. For a store, that attribution layer is the actual product, and it is the reason Klaviyo’s G2 profile claims more than 170,000 businesses.

Mailchimp’s automation is capable on Standard, at around 200 steps, but capped at four steps on Essentials, which in our Mailchimp review we called the single biggest reason to skip the cheaper paid plan. A/B testing and advanced segmentation are also gated to Standard and above. The feature list looks complete from a distance; the parts that drive results sit on the more expensive tiers. Mailchimp does have behavioral segmentation, tags, and contact profiles, and for a general-purpose sender that is enough. What it does not have is Klaviyo’s depth of ecommerce attribution, and no add-on closes that gap.

The practical test: if your first question after a campaign is how much revenue it drove per segment, Klaviyo answers it natively. If your first question is whether the email went out and got opened, Mailchimp answers that too, for less money.

Editor, templates, and ease of use

Mailchimp wins this section, and it is not close. It has the most polished drag-and-drop editor in the category, backed by hundreds of mobile-responsive templates that look professional without design work. G2 reviewers score it 8.7 out of 10 for ease of use across more than 11,000 ratings; Capterra puts ease of use at 4.4. Someone who has never sent a marketing email can build and ship a decent campaign in an afternoon, and Standard and Premium include a dedicated onboarding specialist free for the first 90 days.

Mailchimp also bundles things Klaviyo does not: a free website builder and landing pages come with the platform, so a small business can capture signups and host simple pages without a separate tool. Klaviyo is not hard to use, and Capterra scores it 4.5 for ease of use, but it assumes you have a store, a catalog, and order data to wire in. Its setup effort pays off in attribution, not in getting a first newsletter out the door.

If the team running email is non-technical and the use case is campaigns rather than commerce, Mailchimp lowers the barrier more than almost anything else in the category. That convenience is genuinely worth something. The question this article keeps returning to is whether it is worth the bill at scale.

Deliverability and included sends

For an email platform, nothing else matters if campaigns land in spam, and this is where Mailchimp has slipped. In EmailToolTester’s 2026 testing, Mailchimp reached about 89.5 percent deliverability, ranking seventh out of fifteen tools with 3 out of 5 stars for deliverability tooling. In plain terms, roughly 105 of every 1,000 emails may not reach the primary inbox. On a 5,000-contact list, that is a few hundred people per send who may never see the campaign you paid to deliver. Mailchimp includes reputation monitoring and benchmarking to help, but the raw number is mid-pack.

We do not have an equivalent independent inbox-placement figure for Klaviyo, so we will not invent one. What we can say from the pricing data is that Klaviyo removes a different sending constraint entirely: every email tier includes monthly sends equal to 10 times your profile count, which means 100,000 emails per month at the 10,000-profile tier. A brand emailing that list twice a week will never touch the ceiling, so Klaviyo’s variable cost pressure comes from list growth alone, not from send volume. For high-frequency senders, that is a structural advantage worth as much as a template gallery.

SMS and channels beyond email

Klaviyo is the broader platform by a wide margin. It covers email, SMS/MMS, RCS, WhatsApp, push notifications, social, and reviews in one tool, with more than 350 advertised integrations, and email and SMS tiers upgrade independently, so a brand heavy on one channel does not over-buy the other. The cost caveat from our review stands: SMS is never inside the headline price. The combined Email + SMS plan starts at $35 per month with only 150 SMS/MMS credits included, after which US toll-free SMS runs $0.01 plus carrier fees per send; Klaviyo’s own calculator priced 2,900 monthly texts at roughly $40. Budget SMS as a second subscription.

Mailchimp’s multichannel story is thinner. SMS is a separate paid add-on starting around $20 per month, and there are no native push notifications. What Mailchimp has instead is reach in the general-purpose direction: 300-plus native integrations, an open marketing API, and the bundled website and landing-page tools. For a business whose marketing is mostly email plus a website, that bundle covers more of the actual job. For a store that wants email and SMS coordinated around order data, it does not.

Independent ratings

The review-site data tells the same two-audience story for both products. On software marketplaces, where practitioners review the tool they use, Klaviyo scores 4.6 out of 5 on G2 across 1,361 reviews and 4.6 on Capterra across 537. Mailchimp scores 4.3 on G2 across roughly 12,885 reviews and 4.5 on Capterra across 17,626. Klaviyo rates higher; Mailchimp has vastly more reviews, which fits a product most people try first.

Trustpilot, where anyone can post, inverts the picture for both. Klaviyo sits at 1.7 out of 5 across 367 reviews, 57 percent of them one star. Mailchimp sits at 2.6, with about 67 percent one-star reviews. The complaints cluster identically: billing, surprise charges, and support that is hard to reach. Our reading is that both products earn their marketplace scores and both billing models generate the consumer anger, which is consistent with everything in the pricing section above. Neither Trustpilot score should be read as a verdict on the software; both should be read as a verdict on the invoices.

On the sub-scores where the two diverge, Mailchimp takes ease of use (8.7 on G2) and Klaviyo takes capability, with Capterra scoring it 4.6 for features. That split matches the Lab Scores: Klaviyo 7.4, Mailchimp 6.8, with Klaviyo ahead on depth and included send volume, and both held back by contact-based billing.

Who should choose Klaviyo

Ecommerce brands with meaningful revenue per contact. If your list lives on Shopify, WooCommerce, or BigCommerce, your program is flows-and-campaigns driven, and each subscriber is worth dollars per year rather than cents, Klaviyo’s $150 at 10,000 profiles buys attribution, prediction, and segmentation depth that Mailchimp does not match at any tier. The included 100,000 monthly sends at that size remove overage anxiety entirely.

Brands that want email and SMS under one roof are the other clear case, since the two channels bill and scale independently. Go in with the SMS line modeled separately, and go in with a pruned list: Klaviyo bills every active profile you store, a 9,500-profile list pays $150 while a lazy 13,000-profile list with the same engaged core pays $300, and tier upgrades happen automatically. Klaviyo is a strong product you should only buy with a spreadsheet open. It is still the better product of these two, which is why it wins this comparison at 7.4 to 6.8.

Who should choose Mailchimp

Small businesses and solo marketers with a modest list, a real use for the bundled website builder and landing pages, and a strong preference for the easiest possible tool. At 500 contacts, Essentials at $13 or Standard at $20 is genuinely reasonable, the editor is the best in the category, and the 90-day onboarding specialist on Standard makes the first quarter easy. If your business is general-purpose rather than commerce-driven, Mailchimp covers more of the job than Klaviyo would, for less setup effort.

Know what you are accepting: mid-pack deliverability at about 89.5 percent, automation capped at four steps unless you pay for Standard, phone support locked behind the $350 Premium plan, and billing that counts unsubscribed and duplicate contacts. And if you are considering Mailchimp as the cheap escape from Klaviyo, note that it shares the same contact-based cost problem with less depth; at 5,000 contacts, Standard and Klaviyo both cost exactly $100 a month. Neither tool is the budget option in this category. They are the famous options.

FAQ

Which is cheaper at 10,000 contacts, Klaviyo or Mailchimp?

On sticker price, Mailchimp: Standard is $135 per month at 10,000 contacts against Klaviyo’s $150, and Essentials is $110 if a four-step automation cap is acceptable. The gap narrows in practice. Klaviyo’s $150 includes 100,000 monthly sends, while Mailchimp bills unsubscribed and duplicate contacts, which pushes real counts above 10,000. At 5,000 contacts the two are tied at $100 on Standard.

Is Klaviyo worth switching to from Mailchimp?

For an ecommerce brand on Shopify, WooCommerce, or BigCommerce, usually yes. Klaviyo’s revenue attribution, predictive analytics, and real-time segmentation are the depth Mailchimp lacks, and the price difference at 10,000 contacts is $15 per month. For a newsletter or general small-business list, usually no; you would pay more for ecommerce machinery built around order data you do not have.

Do Klaviyo and Mailchimp both charge for contacts you never email?

Yes, and this is the defining cost trap of both platforms. Since February 18, 2025, Klaviyo bills on total active profiles and auto-upgrades your plan when the count crosses a tier, with downgrades opt-in. Mailchimp bills every stored contact, including unsubscribed and non-subscribed people, and bills the same person twice if they sit in two audiences. Regular pruning directly lowers both bills.

How do the free plans compare?

They are nearly identical on paper and both thin. Each gives 250 contacts and 500 sends per month. Klaviyo adds $5 of mobile message credit and 10,000 Composer AI credits, with email support for the first 60 days and no expiry on the plan. Mailchimp’s free tier, cut in February 2026, adds a 250-per-day send cap and ends email support after 30 days. Both work for testing, neither for real sending.

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