Klaviyo

Best for: E-commerce Email & SMS

Last updated: August 03, 2026

4.9 / 5.0

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Klaviyo is the email and SMS platform built specifically for ecommerce — and for serious stores it's the benchmark. Its deep Shopify integration syncs order and behaviour data into unified profiles in real time, powering best-in-class segmentation, automation flows and revenue attribution across email, SMS, WhatsApp and push. Every feature is available on every paid tier. The honest catch: Klaviyo bills on active profiles, not on emails sent, so costs climb steeply as your list grows — and there's a real learning curve, with full value often 60–90 days out.

Pros

Deepest Shopify integration — store data syncs in real time
Best-in-class ecommerce segmentation & automation flows
Predictive analytics & clear revenue attribution per email/flow
Email, SMS, WhatsApp, RCS & push in one platform
Every feature on every paid tier — no capability gating

Cons

Bills on active profiles — cost climbs steeply as your list grows
You pay for reachable contacts whether you email them or not
SMS billed separately via a monthly credit system
Learning curve & a 60–90-day onboarding for full value
Value narrows for non-ecommerce or list-only use

Key features

Unified customer profiles with full historical data

Deep Shopify & 350+ platform integrations

Advanced segmentation & pre-built automation flows

Predictive analytics & revenue attribution

Email, SMS, WhatsApp, RCS & push messaging

AI-generated segments & content

Marketing Agent — AI campaign & flow creation

Product reviews & sell-in-email tools

A/B testing & benchmarks

Free plan up to 250 active profiles

Pricing

STARTS AT

Free – $2,300+/mo

Monthly billing Annual discount

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Frequently asked questions

How much does Klaviyo cost in 2026? +

There's a free plan up to 250 active profiles, then the Email plan scales by contact tier: about $20/mo at 500 contacts, $45 at 1,500, $100 at 5,000, $150 at 10,000, roughly $720 at 50,000, climbing toward $2,300 at 250,000 before custom billing. SMS is billed separately via credits, and the Email + Mobile bundle adds ~$15 at entry. The key detail: Klaviyo bills on active profiles, not sends.

Why does Klaviyo get expensive as you grow? +

Because you're billed on active profiles — reachable contacts — not on sends or features. That single fact drives the whole bill: store more reachable contacts and you pay more, whether you email them or not. A list that balloons with inactive or never-emailed subscribers quietly inflates cost. The fix is list hygiene: periodically suppress or remove profiles you'll never contact so you're not paying to hold dead weight.

What makes Klaviyo strong for ecommerce? +

It's purpose-built for stores. The Shopify integration syncs order, browsing and customer data into unified profiles in real time, powering segmentation and automation general tools can't match — abandoned-cart, post-purchase and win-back flows triggered on actual store behaviour. Add predictive analytics, clear revenue attribution per email and flow, and multichannel email/SMS/WhatsApp/push, and marketing ties directly to revenue. For a serious store, that depth is the point.

How does SMS billing work? +

Separately from email, through a monthly credit pack rather than a flat fee. Each message consumes credits by destination country and message type, so a US text differs from an international one or an MMS. Every paid plan includes ~150 credits, and above ~5,000 credits the US rate settles near a cent per credit. If SMS is central, model your send volume by country — credits, not the base email price, drive that cost.

Klaviyo or Mailchimp? +

Depends whether you're ecommerce or general. Klaviyo is the specialist — deeper store integrations, sharper ecommerce segmentation and revenue attribution for lifecycle marketing — the stronger choice if selling products is your core. Mailchimp is the broader, often cheaper generalist for newsletters, small businesses and non-commerce, with a gentler learning curve. Run a store and ready to invest in flows? Klaviyo pays off. Mainly need simple campaigns? Mailchimp is lighter and cheaper.

What are the drawbacks? +

Cost trajectory and complexity. Billing on active profiles means expenses escalate as your list grows, SMS adds a separate credit cost, and full value typically involves a 60–90-day onboarding and a real learning curve — powerful, not plug-and-play. Value also narrows outside ecommerce, where the deep store integrations matter less. For a committed online store the payoff justifies the effort; for a small list or non-commerce sender, a simpler, cheaper tool often fits better.

Not sure yet?