Klaviyo vs Mailchimp (2026): Which Suits an Online Store?

Klaviyo and Mailchimp both send email, but they came from different directions, and that's the reason they feel so different once you start using them. Mailchimp grew up as a friendly tool for newsletters and general marketing. Klaviyo grew up around online stores, where the money is in what shoppers browse, buy and abandon. If you run a store, that difference matters more than any feature list. This guide compares them by the jobs an ecommerce owner needs done, from the first welcome email to a win-back campaign. It's a decision guide, so check current features and plans on each company's site.

The question that settles most of it

Ask yourself whether your emails are driven by what customers do or by what you want to announce. If your best emails are triggered by behaviour, such as a basket left behind, a product viewed three times or a second purchase, you want a tool built around store data. If your main email is a weekly newsletter or event announcement with the occasional promotion, a general tool is perfectly fine.

If your email is mostly...	Lean towards	Why
Abandoned baskets, post-purchase and replenishment flows	Klaviyo	Built around store events and product data
Weekly newsletter with a few offers	Mailchimp	Familiar editor, simple campaigns
A mix of shop emails and wider marketing	Either	Compare automation depth against your own team's skills
A tiny list and no store	Mailchimp	Less to learn
Large catalogue with segments by behaviour	Klaviyo	Segmentation uses purchase and browsing data

Data and segmentation

Segmentation is where ecommerce tools earn their keep. In a store-first platform you can build a group such as customers who bought twice, haven't ordered for a while and viewed a particular collection, without exporting spreadsheets. The deeper the connection with your shop, the more specific you can be.

Mailchimp can segment too, using tags, groups and purchase data when connected to a shop. Check how much of your store data flows in automatically and how much you have to set up by hand. Ask yourself how many segments you will realistically build and keep up to date. The most advanced option is useless if no one has time to use it.

Automations that matter to a shop

These are the flows most stores should have, in rough order of payoff. Compare how easy each is to build, and how much customising the templates need.

1. Welcome series for new subscribers.
2. Abandoned basket, for people who started checkout and left.
3. Browse abandonment, for people who looked at products without buying.
4. Post-purchase thank-you and review request.
5. Replenishment or reorder reminders for products that get used up.
6. Win-back emails for customers who've gone quiet.

Store-first platforms tend to give you more ready-made flows built on shop events. General platforms usually have automations too, but you may need to connect more pieces yourself. If you aren't sure how email fits with your shop, my guide on starting email marketing with Shopify covers the basics.

Integrations with your shop

A tool is only as good as its connection to your store. Check the integration for your platform, whether product catalogues, orders and customer data sync in near real time and what happens if the connection breaks. Also check what the integration can't do. Some integrations pull in orders but not discounts or product tags, which can limit your segments. If you're still choosing a platform, my Shopify vs WooCommerce comparison is a good place to start.

Email design and building

Design tools matter if you build a lot of campaigns. Mailchimp has long been known for an approachable drag-and-drop editor and many templates. Klaviyo has its own editor, with product blocks that pull from your catalogue. Try building the same email in both: a header, three product blocks from your shop and a button. Notice how long it takes and how it looks on a phone.

SMS and other channels

Both platforms have expanded beyond email. SMS is the usual extra for stores, with its own consent rules, costs and country restrictions. If you plan to text customers, read the legal requirements for the countries you sell to before you turn anything on, and check how each tool handles consent, opt-outs and quiet hours.

Reporting and revenue tracking

Ecommerce owners want one thing from reports: which emails produced orders. A store-first platform usually reports revenue by campaign and flow, based on shop data. Check how each tool attributes sales, how long after a click it counts an order and how it shows your best flows. Compare those numbers with your shop's own analytics, because different tools count differently.

Deliverability: getting into the inbox

Neither tool can promise inbox placement. What you control is list quality, sender reputation and content. Set up domain authentication, send to people who want your emails and remove those who never engage. Check whether the platform helps with warming up a new domain and whether you can use a dedicated sending setup as you grow.

Forms, popups and growing the list

A shop's list grows through sign-up forms, popups on the site and checkout opt-ins, so look at how each tool handles them. Check whether forms can be styled to match your brand, whether you can show different offers to new and returning visitors and how consent is recorded. A tool that makes it easy to capture emails politely, and respects unsubscribes, will serve your reputation better than one that pushes you towards aggressive tactics.

Learning curve and support

A tool you can't operate is not a bargain. Ask who will build and maintain your flows. If it's you, test how clear the interface feels on a quiet afternoon. If you will hire help, check how many freelancers and agencies know each platform, since a bigger pool of experts can make finding help easier.

Costs, without guessing numbers

Plans for both tools change often, and pricing models differ. One may charge by the number of contacts or profiles, the other may add costs for features or sending volume. Work out your own numbers: how many contacts you have now, how many you expect in a year, how many emails you'll send and which features you need. Then price both for today and for twelve months from now, so you don't pick a plan that looks cheap until your list grows.

If you're moving from one to the other

1. Export your contacts with their subscription status and key data, such as last order date.
2. Rebuild your welcome and abandoned basket flows first, because they earn the most.
3. Authenticate your sending domain in the new tool before you send anything.
4. Send to your most engaged contacts first, so your reputation builds gradually.
5. Keep the old account active for a short overlap, and check that unsubscribes carry across.
6. Compare the first month's revenue per email against the old tool before you celebrate.

Moving takes effort, so don't switch for a minor feature. Switch when the way you want to email customers is held back by the tool you've got.

A simple way to decide

1. List your top three email goals, such as more repeat orders or fewer abandoned baskets.
2. Connect both tools to a test store or a copy of your data.
3. Build the welcome flow and the abandoned basket flow in each.
4. Send test emails to yourself and a colleague and check the mobile view.
5. Compare the reports, the setup time and the quality of help available.
6. Pick the one you can run consistently, and review after a few months.

If you're deciding between Mailchimp and another newsletter-style tool, see Mailchimp vs ConvertKit, or browse the best email marketing software for small business for a wider shortlist.

A fair verdict

For most online stores with real product catalogues and an interest in behaviour-driven emails, Klaviyo is the natural thing to test first. For people sending mostly newsletters, running a small list or just starting out, Mailchimp's familiarity can be a gentler start. If you are close to the line, build the same two flows in each and let your own results decide.

Make email marketing or ecommerce tools? See how to get it featured on this list.

Frequently asked questions

Is Klaviyo better than Mailchimp for ecommerce?

Klaviyo is built around store data and behaviour-based flows, so many online shops find it a natural fit. Mailchimp can work well for simpler newsletters. Test the two flows that matter most to your shop.

Is Mailchimp good for small businesses?

Yes, particularly for newsletters and simple campaigns. Check current plan limits and what automation is included before you commit.

Can I move from Mailchimp to Klaviyo?

Usually yes. Export your contacts and engagement data, rebuild your key flows, authenticate your sending domain and send to engaged contacts first so your reputation stays healthy.

How do the two compare on price?

Pricing models differ and change often. Price both for your current list and for where you expect to be in a year, including the features you need.

Do both support SMS?

Both have offered SMS, with their own rules, costs and country limits. Check consent requirements and current availability for the countries you sell to.