Klaviyo review

The store data comes first, the email second

Klaviyo is a marketing platform for consumer brands, and the thing it is built around is a customer database rather than an inbox. It pulls orders, browse activity and abandoned checkouts out of Shopify, WooCommerce, BigCommerce and 350 or more other integrations, stitches them into one profile per shopper, and sends email, SMS, MMS, WhatsApp, RCS and push off the back of that. Klaviyo calls itself the autonomous B2C CRM, which is a longer way of saying the same thing.

That data layer is why its customer list reads the way it does: Mattel, TaylorMade, Glossier, Liquid Death. The company is based in Boston, has been listed on the NYSE as KVYO since its September 2023 IPO, and reports more than 196,000 customers. If your emails are driven by what someone bought or nearly bought, nothing else in this category is close. If your emails are driven by what you wrote this week, you are paying for machinery you will never start.

Who Klaviyo is built for, and it is not creators

• Direct-to-consumer brands running abandoned cart, browse abandonment and post-purchase flows
• Shopify, WooCommerce and BigCommerce stores that want order data and revenue reporting in the same tool that sends
• Teams sending email and SMS against one profile instead of running two vendors
• Retention marketers who segment on purchase behaviour rather than on tags

Note who is missing. Klaviyo never uses "creator" as its unit of customer, and a newsletter writer gets very little out of the way it is designed.

Free for 250 profiles, and pricing we could not verify

As of July 2026 the free plan holds 250 active profiles and sends 500 emails a month, plus $5 a month to spend on mobile messaging. It is free forever rather than a trial. The unusual part is that it is capped by volume and not by features: flows, automations, segmentation, sign-up forms and A/B testing are all on it. Klaviyo branding sits in your email footers and your sign-up forms until you pay.

On the paid side we have to be plain with you. Klaviyo's pricing page renders its rates through an interactive configurator, and we could not read a single figure off it, so we are not quoting one and we are not borrowing one from a roundup. What we can tell you about the model is verified: you are billed on active profiles held, your plan includes roughly ten times that number in monthly sends, and three add-ons are separately priced at Customer Hub $20 a month, Helpdesk $10 a month and Customer Agent $50 a month.

500 emails, then the send limit locks you out

• Cross 250 profiles and you cannot send at all until you are back under it or you upgrade
• Reach 500 emails in a month and sending stops until the month turns over, and Klaviyo warns that flow email deliverability can fall when you hit that ceiling
• Since 18 February 2025 you pay for profiles you hold, not profiles you email, so a store with 20,000 profiles that mails 8,000 of them pays for 20,000
• Profiles who never consented still count, so somebody who abandoned a cart and never opted in is billable
• Email support runs for your first 60 days only, then you are on community support
• Mobile messaging is metered separately in dollars, and unused spend does not roll over

One correction, because most write-ups get it backwards: suppressed and unsubscribed profiles are not billable. Klaviyo's own documentation says they are not included in your billable profile count. Suppression, not deletion, is the lever if your bill is climbing faster than your list. An agency on Klaviyo's own community forum put the real complaint well, holding 10,000 active profiles against 5,000 actual newsletter subscribers: "Costs keep growing much faster than the actual subscriber base."

Would we start on Klaviyo's free plan? Only to test it

Klaviyo is the best tool in this category for the job it was built to do, and its free plan is the wrong way to meet it. Two hundred and fifty profiles is a fortnight of traffic for a working store, and the feature set you get for nothing is exactly the feature set you will have no room to use. Start here to see whether the flows and the revenue reporting justify a bill, then price it properly against the profile count you actually hold rather than the one you actually mail. If your emails are a newsletter rather than a storefront, free Klaviyo alternatives has cheaper answers, and the best free email marketing tools ranks the category on what zero dollars buys.