Email marketing with AI content and optimization
Freemium
Free trial
Klaviyo
Email and SMS marketing built for e-commerce, with AI baked in
Freemium
Free trial
Affiliate program
Last reviewed April 2026
Overview
What Klaviyo Does
Klaviyo runs email and SMS marketing for e-commerce brands. It pulls in store and customer data, then uses it to power automated flows like welcome series, abandoned cart, and post-purchase, plus one-off campaigns. The difference from a general email tool is how tightly it ties messaging to what each shopper has browsed, bought, and spent, which is why it is a default choice for Shopify stores.
AI Across the Platform
Klaviyo's AI shows up in several places rather than as a single feature. It generates subject lines and content, builds segments from a plain-language description, predicts metrics like a customer's likely lifetime value and churn risk, and optimizes send times per recipient. A Marketing Agent can draft whole campaigns and flows, and a separate Customer Agent handles support and sales conversations with shoppers.
Data and Segmentation
Unified customer profiles sit at the center, holding each shopper's full history so segments and triggers can be specific instead of broad. With hundreds of integrations and predictive analytics, the platform leans toward marketers who want to slice their list finely and act on behavior, not just send the same blast to everyone.
Pricing Reality
There is a free plan for up to 250 profiles with a monthly email cap. Paid email plans start at $20/month and scale with the number of active profiles, while Email + SMS plans start higher and bill SMS message volume separately. Costs climb steeply as your list grows, and very large senders move to the enterprise Klaviyo One tier, so it pays to project your spend at scale before committing.
Pros
- ✓Built specifically for e-commerce and Shopify data
- ✓AI spans content, segments, predictions, and send times
- ✓Detailed customer profiles enable precise segmentation
- ✓Free plan lets small stores start without commitment
Cons
- ✕Costs rise steeply as your contact list grows
- ✕SMS is billed separately on top of email pricing
- ✕More platform than a small store with simple needs requires
Key features
AI content generation
Drafts subject lines, email copy and creative.
Send-time optimization
Recommends the best times to reach each contact.
Email and SMS flows
Automates welcome, abandoned cart, and post-purchase sequences triggered by shopper behavior.
Predictive analytics
Forecasts metrics like customer lifetime value and churn risk to guide targeting and timing.
AI segmentation
Builds audience segments from a plain-language description against unified customer profiles.
Deep Shopify integration
Syncs store and customer data through 350-plus integrations for behavior-based messaging.
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Frequently asked questions
- Yes. The free plan covers up to 250 profiles and 500 emails per month, which is enough to set up and test flows before upgrading.
- Paid email plans start at $20/month and are priced by active profiles, so cost scales with list size. Email + SMS starts higher and bills SMS message volume separately, and very large senders move to the enterprise Klaviyo One tier.
- Klaviyo offers AI subject lines and content, AI-built segments, predictive analytics such as lifetime value and churn, per-recipient send-time optimization, and agents for marketing and customer support.
- Yes. It is built for e-commerce and integrates deeply with Shopify, syncing store and customer data so messages can react to what each shopper actually does.
Editor’s note
Klaviyo is the heavyweight for e-commerce email and SMS, and the AI is genuinely woven through the product rather than tacked on. The data depth and segmentation are its real strength. The catch is price: it scales hard with your list and SMS bills on top, so smaller stores should run the numbers at their projected size before settling in.