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Tool review · Commerce

Klaviyo

Email and SMS for ecommerce, now with a serious AI layer.

8.9/10Best ecommerce CRM

Gregory Greenstein, Aiacent

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  • Updated
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  • How we rank

The Aiacent take

Klaviyo is not 'an AI tool.' It is the ecommerce CRM that added AI in the places that matter: segments, subject lines, product recommendations, and (carefully) content. That is why it leads our ecommerce ranking, the 2026 marketing stack, and the AI email ranking. The brands making money on owned channels already live here; the AI features are leverage, not the reason the category exists.

If a vendor pitches you an 'AI email tool' for your store and they are not integrating with this customer graph, you are buying a sidequest. Mailchimp, Brevo, and HubSpot are real peers on the email page — they are the right buy when the job is a newsletter, a cheap send, or a B2B CRM, not a Shopify lifecycle graph.

Klaviyo ecommerce CRM — official www.klaviyo.com marketing shot of a tablet audience segment with per-profile channel and revenue
Klaviyo ecommerce CRM. Frame: official www.klaviyo.com product marketing tablet of a 4,182-profile segment. Not a lab test.

Pros

  • Still the default marketing OS for serious ecommerce
  • AI helps with segments, content, and predictions — on top of a real platform
  • SMS, email, and reviews in one customer graph

Cons

  • Bills grow with your success, which feels like a tax
  • You can over-message if you turn every AI suggestion on
  • B2B / non-commerce CRM use is a stretch

Who it's for

  • DTC and ecommerce teams on Shopify, BigCommerce, and similar
  • Retention marketers who think in flows, not blasts

Who should skip it

  • B2B SaaS — use a product-led lifecycle tool
  • Stores that have not fixed their product catalog or tracking

What matters in the product

Flows and segmentation

The product. AI can suggest; your offer and cadence still decide whether you are a brand or an inbox pest.

AI content and predictions

Useful for variants and likely-to-buy audiences. Review everything that sounds like a person wrote it, because customers can tell.

Verdict

The ecommerce marketing platform to beat. Adopt its AI features after the flows are right, not instead of them.

Start with Klaviyo

FAQ

Usage-based on profiles and messages Public list we last checked: Free: $0 (Small list, real product); Email / SMS: Scales with usage (Watch the profile count). Confirm on the vendor site. We do not set their prices, and we do not invent promotional codes.

Refund and cancel terms are not listed here because we do not republish unpublished vendor policies. Check the vendor checkout and help center before you buy.