This is one of the most common questions ecommerce brands ask us: should we use Mailchimp or Klaviyo? The answer is not as simple as most comparison articles make it seem, because both platforms have genuine strengths and the right choice depends on context.
We have used both platforms extensively — Mailchimp for over a decade and Klaviyo for the past six years. We have migrated brands from Mailchimp to Klaviyo, and we have seen brands thrive on Mailchimp when Klaviyo would have been overkill. This comparison is based on our direct experience, not feature list comparisons from marketing pages.
Our perspective and disclosure
Full transparency: we are a Klaviyo partner and offer Klaviyo email marketing services. We chose to partner with Klaviyo because, for the ecommerce brands we work with, it consistently delivers better results. That said, we have no interest in recommending Klaviyo to brands where Mailchimp would serve them better — a bad platform recommendation damages the client relationship and our reputation.
This comparison is written as honestly as we can make it. Where Mailchimp is better, we say so. Where Klaviyo is better, we say so. Where it depends on context, we explain the context.
Platform overview: different DNA
The fundamental difference between Mailchimp and Klaviyo is their origin and focus.
Mailchimp started as an email marketing platform for small businesses of all types — restaurants, consultants, nonprofits, local shops, and yes, ecommerce. It has evolved into an all-in-one marketing platform with email, social media scheduling, website building, CRM, and more. Its strength is breadth: it does a lot of things reasonably well.
Klaviyo was built specifically for ecommerce from day one. Every feature, every integration, and every reporting metric is designed around the ecommerce use case: driving revenue through personalised email and SMS marketing based on customer purchase behaviour. Its strength is depth: it does ecommerce email marketing exceptionally well.
This difference in DNA shapes every aspect of the comparison that follows.
Shopify integration depth
For Shopify stores, integration depth is arguably the most important factor. How much of your store's data does the email platform have access to, and how effectively can it use that data?
Klaviyo's Shopify integration
Klaviyo's Shopify integration is native and deep. It syncs:
- Complete customer profiles (contact details, order history, lifetime value)
- Real-time events (viewed product, added to cart, started checkout, placed order)
- Product catalogue (including images, prices, variants, inventory)
- Customer tags and metafields
- Historical data (backfilled on connection)
- On-site behaviour (active on site, viewed specific products or collections)
This means you can build segments like "customers who purchased a specific product more than 90 days ago, have viewed the site in the last 30 days, but have not purchased again" — and trigger automated flows based on these real-time behaviours.
Mailchimp's Shopify integration
Mailchimp's Shopify integration syncs customer data, purchase history, and product information. After the 2019 split and 2022 reconnection, the integration has improved significantly. However, it does not match Klaviyo's depth in several areas:
- Real-time on-site behaviour tracking is limited compared to Klaviyo's event-based system
- Product recommendation algorithms are less sophisticated
- Predictive analytics (predicted customer lifetime value, expected purchase date) are not available at the same depth
- Dynamic product feeds in emails are less flexible
For basic ecommerce email marketing — abandoned cart emails, post-purchase sequences, and newsletters — Mailchimp's Shopify integration is adequate. For advanced segmentation and personalisation based on purchase behaviour, Klaviyo has a material advantage.
Segmentation and targeting
Segmentation is where Klaviyo's ecommerce focus becomes most apparent. The depth and flexibility of segmentation directly determines how targeted (and therefore how effective) your emails can be.
Klaviyo segmentation
Klaviyo allows you to build segments based on virtually any combination of customer properties, purchase behaviour, email engagement, on-site activity, and predictive metrics. Examples of segments that are straightforward to build in Klaviyo:
- Customers who bought from Category A but never from Category B
- Customers with a predicted lifetime value above £500
- Customers who are predicted to churn within 30 days
- Customers who viewed a specific product three or more times without purchasing
- VIP customers (top 10% by revenue) who have not opened an email in 60 days
- New subscribers who engaged with the welcome series but have not purchased
These segments update dynamically — customers enter and exit segments automatically based on real-time behaviour.
Mailchimp segmentation
Mailchimp's segmentation has improved in recent years and supports conditions based on demographics, purchase history, email engagement, and tags. However, the depth of ecommerce-specific segmentation is more limited:
- Fewer ecommerce behaviour triggers available
- No predictive analytics (predicted CLV, churn risk) on standard plans
- More limited conditional logic for complex multi-condition segments
- On-site behaviour data is less granular
For brands sending primarily broadcast campaigns to broad audiences, Mailchimp's segmentation is sufficient. For brands pursuing personalised, behaviour-driven email programmes, Klaviyo's segmentation is significantly more capable.
Automation and flows
Automated email sequences (flows) generate the majority of email revenue for most ecommerce brands. The quality and flexibility of the automation builder is therefore critical.
Klaviyo flows
Klaviyo's flow builder is purpose-built for ecommerce automation. Key capabilities:
- Trigger diversity. Flows can be triggered by purchases, cart abandonment, product views, segment entry, date-based events (birthdays, subscription renewal), and custom events.
- Conditional splits. Branch flows based on any customer property, purchase history, or engagement metric. Send different emails to first-time buyers versus repeat customers within the same flow.
- A/B testing within flows. Test different email content, timing, or subject lines within automated sequences.
- Dynamic product blocks. Automatically populate emails with recommended products based on the customer's browsing and purchase history.
- Revenue attribution. Every flow and every email within a flow shows attributed revenue, allowing precise optimisation.
The essential Klaviyo flows for ecommerce — welcome series, abandoned cart, browse abandonment, post-purchase, and win-back — are where most email revenue is generated.
Mailchimp automations
Mailchimp has rebuilt its automation capabilities significantly in recent years. The Customer Journey Builder provides a visual, drag-and-drop interface for creating multi-step automated sequences. It supports:
- Standard ecommerce triggers (purchase, abandonment, signup)
- If/else branching based on conditions
- Wait steps and time delays
- Tagging and list management actions
Mailchimp's automation is capable for standard flows. Where it falls behind Klaviyo is in the depth of conditional logic, the granularity of ecommerce triggers, and the ability to use purchase behaviour and browsing data within flow logic.
We have set up abandoned cart sequences on both platforms for the same brand. Klaviyo's version, with conditional splits based on cart value, customer purchase history, and predicted CLV, consistently recovered 30-50% more revenue than the Mailchimp equivalent. The platform's deeper data access makes a measurable difference.
Pricing comparison
Pricing is where Mailchimp has a clear advantage for smaller lists and where the comparison gets nuanced at scale.
Side-by-side pricing (as of early 2026)
| List size | Mailchimp Standard | Klaviyo Email | Difference |
|---|---|---|---|
| 500 | Free tier available | Free tier available | Both free at this size |
| 2,500 | ~£30/month | ~£50/month | Klaviyo ~67% more |
| 10,000 | ~£75/month | ~£120/month | Klaviyo ~60% more |
| 25,000 | ~£170/month | ~£375/month | Klaviyo ~120% more |
| 50,000 | ~£270/month | ~£720/month | Klaviyo ~167% more |
Note: Prices are approximate and subject to change. Both platforms adjust pricing periodically. Check current pricing on their websites for exact figures.
The pricing nuance
Klaviyo is more expensive at every list size. That is a fact. However, the relevant metric is not cost per subscriber — it is return on investment. Klaviyo's deeper integration, better segmentation, and more sophisticated automation typically generate higher revenue per email. For ecommerce brands generating meaningful email revenue, the higher cost is usually offset by higher returns.
Mailchimp's free tier is generous (up to 500 contacts, 1,000 emails per month) and is perfectly adequate for brands just starting out with email marketing. Klaviyo also offers a free tier (up to 250 contacts), which is more limited.
For a deeper look at what email marketing management should cost across different service levels, see our guide on how much Klaviyo management should cost.
Reporting and attribution
Understanding what your email marketing is actually generating in revenue is essential. The two platforms approach reporting differently.
Klaviyo reporting
Klaviyo attributes revenue to specific emails and flows using a configurable attribution window (default: 5-day click, 24-hour open). This means you can see exactly how much revenue each abandoned cart email generated, how much each campaign earned, and which flows are your highest performers. Klaviyo also provides:
- Predicted customer lifetime value at the individual level
- Expected date of next order (per customer)
- Churn risk scores
- RFM (recency, frequency, monetary) analysis
- Benchmarking against similar-sized ecommerce brands
Mailchimp reporting
Mailchimp provides standard email metrics (open rate, click rate, bounce rate, unsubscribe rate) and has added revenue reporting for ecommerce integrations. Revenue tracking shows which campaigns and automations drove purchases. However:
- Attribution modelling is less sophisticated than Klaviyo's
- Predictive analytics are limited to Mailchimp's Premium plan
- Individual customer-level revenue data is harder to access
- Flow-level revenue breakdowns are less granular
For brands that need to justify email marketing spend to stakeholders with clear revenue data, Klaviyo's reporting is substantially stronger.
SMS marketing
SMS is increasingly important for ecommerce brands, and both platforms now offer it — but with different levels of maturity.
Klaviyo SMS
Klaviyo includes SMS as a native channel within the same platform. You can combine email and SMS in the same flows, segment based on both channels, and coordinate messaging to avoid over-communication. SMS and email share the same customer profiles and data, making cross-channel personalisation seamless. SMS pricing is pay-per-message on top of the email subscription.
Mailchimp SMS
Mailchimp added SMS marketing in 2023. It supports basic SMS campaigns and automations, but the integration between email and SMS is less mature than Klaviyo's. SMS segmentation options are more limited, and the ability to combine email and SMS in complex automated flows is less flexible.
For brands planning a serious SMS marketing programme alongside email, Klaviyo's unified approach is currently stronger. For brands that want basic SMS capabilities as an add-on to email, Mailchimp's offering may be sufficient.
Ease of use and learning curve
This is an area where Mailchimp has a genuine advantage.
Mailchimp
Mailchimp's interface is designed for accessibility. The email editor is intuitive, the campaign setup flow is straightforward, and someone with no email marketing experience can send a professional-looking campaign within an hour. The platform's breadth of tutorials, documentation, and community support is extensive. For small teams without dedicated email marketing expertise, Mailchimp's lower learning curve is a real advantage.
Klaviyo
Klaviyo's interface is more complex because the platform is more powerful. The flow builder, while excellent, takes time to learn. Segmentation, while more capable, requires understanding ecommerce data models to use effectively. Template building is flexible but less visually intuitive than Mailchimp's drag-and-drop editor.
Klaviyo provides extensive documentation, a certification programme, and a large partner ecosystem. But the platform rewards expertise — a skilled Klaviyo operator will generate significantly more revenue than someone using it casually. This is why many brands work with a managed Klaviyo service rather than running it in-house.
Which to choose: the honest recommendation
After years of working with both platforms, here is our honest recommendation based on business context:
Choose Mailchimp if:
- You are just starting out. Fewer than 1,000 subscribers, limited email marketing experience, and a modest product range. Mailchimp's free tier and ease of use let you start without investment.
- Ecommerce is not your primary business. If you are a consultancy, service business, or content creator who also sells products, Mailchimp's broader marketing tools are more useful.
- You do not have email marketing expertise. If nobody on your team has email marketing experience and you are not ready to hire or outsource, Mailchimp's lower learning curve means you will actually use it.
- Budget is the primary constraint. At larger list sizes, the price difference between the platforms is significant. If your email marketing is not yet generating enough revenue to justify the investment, Mailchimp makes financial sense.
Choose Klaviyo if:
- Ecommerce is your primary business. If you run a Shopify store and email is (or should be) a material revenue channel, Klaviyo's purpose-built capabilities will generate more revenue.
- You have more than 5,000 subscribers. At this size, the sophistication of segmentation and automation starts to have a meaningful impact on revenue.
- You want to invest seriously in email. Whether through an in-house specialist or an agency, if email marketing is a strategic priority, Klaviyo provides the tools to execute at a high level.
- You need advanced automation. Multi-step flows with conditional logic based on purchase behaviour, browsing history, and predictive metrics are Klaviyo's core strength.
- You plan to add SMS marketing. Klaviyo's unified email + SMS platform is currently the strongest integrated solution for ecommerce.
- You need revenue attribution. If you need to prove the ROI of email marketing with accurate revenue data, Klaviyo's attribution reporting is essential.
The migration question
If you are currently on Mailchimp and considering a move to Klaviyo, the migration itself is straightforward. Klaviyo offers a direct import tool for Mailchimp data. The larger investment is rebuilding your automation flows and optimising your segmentation to take advantage of Klaviyo's capabilities. Most migrations take 1-2 weeks to complete properly.
We generally recommend migration when email revenue reaches a point where the improved performance on Klaviyo would offset both the platform cost increase and the migration effort within 3-6 months. For most brands, this tipping point is around 5,000-10,000 active subscribers with regular purchasing behaviour.
Making the decision
Both Mailchimp and Klaviyo are capable platforms. Neither is universally better — they serve different needs at different stages. The worst outcome is choosing based on a blog post (including this one) without evaluating your specific situation.
If you are an ecommerce brand on Shopify with 5,000+ subscribers and email is a strategic revenue channel, Klaviyo will almost certainly deliver better results. If you are earlier in your journey, Mailchimp is a perfectly reasonable starting point that will serve you well until you outgrow it.
If you would like help evaluating which platform is right for your store, or if you are ready to optimise your Klaviyo setup, our email marketing team can help. Start a conversation — we will give you an honest recommendation based on your specific situation.