Klaviyo

Key points

• Category: Email marketing & ESPs
• Pricing: Freemium
• Best for: Ecommerce brands running lifecycle programmes.
• Ecommerce data model
• Flows and segmentation
• SMS in the same platform

What Klaviyo is

Klaviyo is a marketing automation platform built for ecommerce, developed by Klaviyo Inc. (Nasdaq: KVYO), that combines email and SMS sending with a built-in customer data platform. It ingests customer and order events directly from Shopify, WooCommerce, Magento and other commerce platforms, storing them as unified customer profiles that power segmentation and flows. Under the hood it uses profile-based data storage rather than simple contact lists, so every interaction, purchase, and web event attaches to a single customer record.

Ecommerce teams use Klaviyo to build automated flows such as abandoned cart, browse abandonment, post-purchase, and win-back sequences, alongside one-off email campaigns and SMS. It includes drag-and-drop email design, AI subject-line and content generation, predictive analytics (like expected date of next order), and a helpdesk module for customer service, letting marketing and support share the same customer profile.

It sits in the email marketing & esps part of an email stack - campaign, lifecycle and transactional sending platforms. In practice it is the right pick when your priority is: ecommerce brands running lifecycle programmes.

What it does well

The capabilities teams rely on most are ecommerce data model, flows and segmentation, sms in the same platform. Taken together these cover the day-to-day work in this category, and they are the features worth testing during a trial rather than reading about.

Klaviyo is particularly strong for ecommerce brands that need deep integration between order/customer data and messaging, offering more granular ecommerce-specific segmentation and flow triggers than general-purpose ESPs. Its combined email/SMS/data platform reduces the need for a separate CDP for mid-market online retailers.

In real use the strongest points people report are excellent ecommerce integrations; powerful segmentation.

Key features

• Ecommerce data model
• Flows and segmentation
• SMS in the same platform
• Excellent ecommerce integrations
• Powerful segmentation

Pricing tiers

Klaviyo is a freemium product. Klaviyo bills primarily on the number of active profiles (contacts who can be emailed) rather than send volume, with separate charges for SMS/mobile messaging; a free tier covers a small number of profiles and monthly sends. Since February 2025 accounts must be on a plan matching or exceeding their active profile count, with optional auto-upgrade/downgrade billing preferences. Exact tier prices change periodically, so current figures should be checked on Klaviyo's pricing page.

• Klaviyo bills primarily on the number of active profiles (contacts who can be emailed) rather than send volume, with separate charges for SMS/mobile messaging; a free tier covers a small number of profiles and monthly sends.
• Since February 2025 accounts must be on a plan matching or exceeding their active profile count, with optional auto-upgrade/downgrade billing preferences.
• Exact tier prices change periodically, so current figures should be checked on Klaviyo's pricing page.

Pricing pages move often, so confirm the current figures with the vendor before you budget. The number worth modelling is not the licence fee on its own but the cost per delivered email once bounces, suppressed contacts and spam-foldered sends are taken out.

Ideal customer profile

• Best fit: Ecommerce brands running lifecycle programmes.
• Where it sits in the stack: Email marketing & ESPs - campaign, lifecycle and transactional sending platforms.
• Budget profile: Freemium - suited to teams comfortable with this commercial model.
• Probably not for you if: cost rises quickly with list size would block your team.

What it connects to

Klaviyo is commonly wired into Shopify, WooCommerce, Magento/Adobe Commerce, BigCommerce, Meta Ads, Google Ads, Zapier, Gorgias, Okendo, Recharge, Stripe and Yotpo. Check that the specific objects and events you rely on are covered, not just that a logo appears on the integrations page - shallow connectors are a frequent source of rework.

Where it falls short

No tool in this space is complete on its own. With Klaviyo the trade-offs to plan around are cost rises quickly with list size. None of these are reasons to avoid it - they are the gaps another layer of your stack needs to fill.

Costs scale quickly with list size because pricing is based on total active profiles rather than actual engagement or sends, which has drawn criticism after the 2025 billing changes tightened plan-matching requirements. Non-ecommerce businesses may find its feature set and pricing model less suited to their needs compared with simpler general-purpose tools.

A useful test before committing: send a real campaign through your intended setup, then check where it actually lands across Gmail, Outlook, Yahoo and your customers' corporate filters. Tooling that looks identical on a feature list often behaves very differently once reputation and authentication are involved.

The essentials

Category

Email marketing & ESPs

Pricing model

Freemium

Vendor

klaviyo.com

G2 rating

4.6 / 5

Best for

Ecommerce brands running lifecycle programmes.

Works alongside Warmy

Yes - warm-up, placement, DMARC

Review scores are rounded public averages and change over time - treat them as indicative rather than exact.

How it fits a deliverability stack

Deliverability is decided by four things: the reputation of the sending domain and mailbox, the quality of the list, correct SPF, DKIM and DMARC authentication, and proof of where mail actually lands. Klaviyo covers part of that picture. The mistake most teams make is buying four separate products for those four jobs and still having no single place that tells them whether the last campaign reached the inbox.

Warmy runs warm-up, inbox placement testing, email verification and DMARC monitoring as one platform, which is why Klaviyo usually sits alongside it rather than against it: it keeps doing what it is good at, while reputation, placement and authentication are handled in one loop.

Klaviyo provides built-in reporting on opens, clicks, bounces and spam complaints, and supports standard domain authentication (SPF/DKIM/DMARC) during setup, but it relies on shared sending infrastructure for most accounts rather than dedicated IPs. It does not replace ongoing sender reputation management or list hygiene practices, which senders must still handle through their own engagement and suppression strategies.