Klaviyo vs HubSpot Marketing Hub vs MailerLite: Which One Fits What You're Selling?

Updated August 2026

These three names show up in the same searches and get compared in the same breath, but they weren't built to solve the same problem. Klaviyo is built for ecommerce revenue: deep Shopify and store-data integration, flows triggered by what someone browsed or bought, and revenue attributed per send, which is why DTC brands accept its price. HubSpot Marketing Hub is the platform play: email is one part of a CRM-attached suite with landing pages, forms, workflows, and reporting across the funnel, bought by B2B teams who want one system instead of stitching together best-of-breed tools. MailerLite is the lean sender: genuinely cheap, pleasant to use, automation strong enough for a creator or a small business, and it doesn't pretend to be a platform.

So the real sorting question isn't which tool has more features. It's whether you're selling products, running a B2B funnel, or just trying to send good email without the bill turning into a second rent payment. We priced all three at 5,000, 50,000, and 250,000 contacts using each vendor's own live pricing tools, checked August 26, 2026, because in this category the meter is the actual story and the ranking moves with where your list sits today.

TL;DR

What Each Tool Is Actually Built For

Klaviyo: revenue is the entire design principle

Klaviyo's philosophy is that email and SMS should get measured the way a paid ad channel gets measured: by revenue produced, not open rate. Every flow ties back to real purchase data pulled directly from Shopify, WooCommerce, and other store platforms, so a merchandiser can see exactly how many dollars an abandoned-cart flow produced. That data-first design shows up in Klaviyo's own numbers: across more than 183,000 accounts, automated flows generate close to 41% of total email revenue from just 5.3% of sends, and revenue per recipient runs nearly 18 times higher on flows than on one-off campaigns, according to Klaviyo's own email marketing benchmarks. Behavior-triggered flows built on store data outperform broadcast sends by an order of magnitude, and Klaviyo is built to make that gap visible rather than just real.

HubSpot Marketing Hub: email is one seat at a bigger table

HubSpot's bet has never really been about email. It's the flywheel: attract, engage, and close, all fed by one shared contact record across marketing, sales, and service. Marketing Hub extends that record to landing pages, ad attribution, forms, and nurture, so a lead's path from first click to closed deal lives in one place instead of scattered across a marketing tool and a separate CRM. That's the whole reason to pick it over Klaviyo or MailerLite: you're buying a data model, and email is one channel that runs on top of it. The tradeoff shows up fast in the pricing: HubSpot's Professional and Enterprise tiers both carry a mandatory, one-time onboarding fee on top of the monthly price, $3,000 and $7,000 respectively, stated explicitly on HubSpot's own Marketing Hub pricing page.

MailerLite: cheap, clean, and not pretending otherwise

MailerLite's philosophy is that a small business or a creator shouldn't need a steep learning curve or a five-figure budget to run professional campaigns. The drag-and-drop builder and a genuinely usable free tier are aimed at getting someone sending inside an hour, and the pricing follows the same logic: every paid plan gets the full feature set, and you only pay more for a bigger list or more sending, not for features a competitor would gate behind a higher tier. One thing worth knowing before you commit: MailerLite isn't the independent, bootstrapped company it used to be. It was acquired by Vercom S.A., a Polish communications software company that's part of the cyber_Folks group, confirmed by MailerLite's own leadership page, which lists a Chief Legal Officer shared across MailerLite and Vercom, and by Computer Weekly's reporting on the acquisition. The product and pricing haven't changed because of it, but know that going in if vendor independence matters to your evaluation.

Decision by Business Goal

Team and Role Fit

For the buying framework behind this decision rather than just these three vendors, see how to choose email marketing software.

Pricing at 5,000, 50,000, and 250,000 Contacts

Every pricing page here leads with its cheapest number, and none of the three meter your bill the same way, so the sticker price alone tells you almost nothing. Here's exactly what counts toward what you pay on each, verified directly against each vendor's own source.

That difference is worth real money on a list with any churn. A brand with 30,000 signups but 10,000 hard bounces and unsubscribes pays for roughly 20,000 on Klaviyo or MailerLite, but a HubSpot account with the same churn keeps those 10,000 dead contacts free, since they simply stop counting as marketing contacts.

Pricing at 5,000 contacts

MailerLite wins on price by a wide margin here, and it isn't close. HubSpot Starter looks competitive with Klaviyo on paper, but it buys a single seat and no real automation builder, the actual reason most teams look at HubSpot in the first place.

Pricing at 50,000 contacts

MailerLite still leads on raw price, but Klaviyo's gap narrows once you weigh what it buys: revenue attribution and store-triggered flows that neither MailerLite nor a standalone HubSpot subscription is built to do. HubSpot Professional has grown to more than 6 times Klaviyo's rate for the same list size, before the onboarding fee even enters the math.

Pricing at 250,000 contacts

This is where the sticker-price story falls apart, and it's the most useful thing this comparison can show you.

None of the three vendors publish a self-serve price at 250,000 contacts. Klaviyo and MailerLite both cap their public calculators well below that size and hand you to a sales conversation instead. HubSpot is the only one with a fully published number this high, and only because its contact-tier schedule technically extends that far; a list this size is a strong Enterprise candidate regardless, and Enterprise beats Professional here because its per-contact rate drops faster as volume climbs. Anywhere near this size, budget for a real sales conversation, not a number off a pricing page.

Send volume is a separate limit from contact count, and each platform handles it differently

Implementation and Change Management

All three require the same groundwork before day one matters: authenticate your sending domain with SPF, DKIM, and a DMARC record. Google has required this for any sender pushing more than 5,000 messages a day to Gmail addresses since February 1, 2024, and it applies no matter which of these three platforms sends the mail, according to Google's own email sender guidelines. None of the three do that DNS setup for you, and skipping it is the single most common reason a migration tanks deliverability in week one.

None of the three import a competitor's automation logic. Whatever flow, workflow, or automation trigger you rely on today gets rebuilt from scratch, a real project even when the contact import itself takes an afternoon. Budget that rebuild time separately from the switch date, and don't cut over fully until a real campaign has sent and landed from the new platform.

Risk and Governance

Dedicated IPs exist on all three, but none of them hand one out by default

If consistent inbox placement at scale matters more than any pricing-table number above, none of the three make it easy to buy off a shelf; all three gate it behind a sales conversation and steady, meaningful send volume first.

Ownership and lock-in

None carry an obvious shutdown risk. But "who owns this" is still worth checking before you commit, since a company that looked independent two years ago isn't necessarily independent today.

When Klaviyo Is the Right Call

• You run a Shopify or WooCommerce store and want every flow's revenue traceable to an actual purchase, not just an open or a click
• Your highest-value sends trigger off real store events (an abandoned cart, a browsed product, a post-purchase window), not a calendar
• The premium over MailerLite is smaller than what a manual reporting workaround would cost your team
• SMS and email need to run off the same purchase data, even paying per message

When HubSpot Marketing Hub Is the Right Call

• Marketing and sales genuinely need to work off the same contact record, not a shared spreadsheet export
• You're building a full funnel, forms, landing pages, ad attribution, and nurture, in one connected system instead of four stitched-together tools
• You've budgeted the $3,000 or $7,000 onboarding fee as a real line item, not a surprise found after signing
• Someone owns CRM hygiene, since the platform's value depends on the contact record staying clean

When MailerLite Is the Right Call

• Your list is a few thousand to a few tens of thousands of contacts, and the monthly bill is a real constraint
• You need real, multi-step automation but don't have a marketing ops hire to build something as deep as Klaviyo's flows or HubSpot's workflows
• You don't need a CRM, store-data attribution, or SMS, just good email sent reliably and cheaply
• Vendor independence isn't a dealbreaker, since MailerLite now operates under Vercom and cyber_Folks rather than as a standalone company

Decision Framework

The verdict: if revenue attribution on purchase-triggered flows is the job, Klaviyo is worth its premium over MailerLite at every size tested. If the job is unifying marketing and sales on one contact record, HubSpot is the only one of the three actually built for that, and the onboarding fee is the cost of buying a CRM, not an email tool. If the job is just sending good email without the bill creeping past what the list is worth, MailerLite wins on price at 5,000 and 50,000 contacts by a wide enough margin that the other two need a specific reason to justify the gap.

What to Do Next

Pull your actual contact count and churn rate (unsubscribes and bounces as a share of your list), not next year's target, and run both through the tables above; the ranking moves with list size more than with any feature comparison. If you're leaning Klaviyo or MailerLite, build one real flow or automation with your own data during the trial before committing annually. If you're leaning HubSpot, get the $3,000 or $7,000 onboarding fee written into your budget approval before you sign, since it's easy to miss on a page that leads with the monthly number.

For the wider field, the best email marketing software roundup ranks 12 platforms by fit. If Klaviyo's pricing curve is the sticking point, best Klaviyo alternatives covers 10 other options. If HubSpot is more platform than you need, best HubSpot alternatives covers lower-cost ways to get marketing and CRM data talking to each other. For a broader buying framework rather than these three vendors, see how to choose email marketing software for ecommerce, how to choose an all-in-one marketing platform, or how to choose email marketing software for a small business.