Klaviyo
Email & MarketingAI-powered B2C CRM platform unifying email, SMS, WhatsApp marketing and customer service with advanced segmentation and automation for ecommerce brands.
Klaviyo is an AI-first B2C CRM platform designed specifically for ecommerce brands, combining marketing automation across email, SMS, WhatsApp, and mobile push with customer service capabilities. It features advanced segmentation powered by a customer data platform that unifies all customer data for 360-degree profiles, predictive analytics, and personalized messaging at scale. The platform serves 193,000+ brands with AI agents for marketing content creation and customer service, comprehensive analytics with benchmarks, and deep integrations with 350+ ecommerce platforms. While powerful for mid-to-enterprise ecommerce businesses, it can be cost-prohibitive for smaller brands and has a steeper learning curve than simpler email tools.
Best for
Fast-growing ecommerce and D2C brands needing sophisticated customer segmentation, omnichannel marketing automation, and data-driven personalization at scale.
Editorial profile generated March 17, 2026 · pricing & endpoint re-verified continuously (see badges above)
27/50
Overall Score
API Quality
9/10
GTM Relevance
18/20
PricingFreemium
Complexitymedium
Learningmedium
Visit klaviyo.com →API Analysis
REST API
✓
Available
Webhooks
✓
Available
GraphQL
—
—
OAuth
✓
Available
shopifywoocommercemagentobigcommercesalesforcezapiersegmentfacebook
Pricing
freemiumFree Tier
Free up to 250 contacts and 500 emails/month. Paid plans start around $20/month based on contact count, with pricing scaling up significantly for larger lists.
Listed pricing, as of Mar 2026 — not independently verified; confirm on the vendor's site before relying on it.
What users say
Themes from 1,357 real reviews on G2 · ★ 4.5
Users like
Strong integrations with ecommerce platforms like Shopify
Powerful segmentation and personalization capabilities
Easy to use email and automation builder
Good analytics and reporting features
Users dislike
Expensive pricing that scales quickly with contact list size
Steep learning curve for advanced features
Customer support can be slow to respond
SMS costs add up significantly
Alternatives
Reviews
Links
FAQ
What is Klaviyo?
Klaviyo is an AI-first B2C CRM platform designed specifically for ecommerce brands, combining marketing automation across email, SMS, WhatsApp, and mobile push with customer service capabilities. It features advanced segmentation powered by a customer data platform that unifies all customer data for 360-degree profiles, predictive analytics, and personalized messaging at scale. The platform serves 193,000+ brands with AI agents for marketing content creation and customer service, comprehensive analytics with benchmarks, and deep integrations with 350+ ecommerce platforms. While powerful for mid-to-enterprise ecommerce businesses, it can be cost-prohibitive for smaller brands and has a steeper learning curve than simpler email tools.
Is Klaviyo free?
Yes, Klaviyo offers a free tier. Free up to 250 contacts and 500 emails/month. Paid plans start around $20/month based on contact count, with pricing scaling up significantly for larger lists. Pricing shown is as last reviewed and may change — confirm current pricing on the vendor's site.
What are Klaviyo alternatives?
Popular alternatives to Klaviyo include Mailchimp, ActiveCampaign, Customer.io, Brevo, HubSpot. Compare features, API quality, and pricing on GTM Tools.
Does Klaviyo have an API?
Yes, Klaviyo provides a REST API. API quality is rated EXCELLENT. Documentation: https://developers.klaviyo.com.
Who is Klaviyo best for?
Fast-growing ecommerce and D2C brands needing sophisticated customer segmentation, omnichannel marketing automation, and data-driven personalization at scale.
How current is Klaviyo's data on GTM Tools?
Endpoint reachability and pricing for verified-tier tools are re-checked on a schedule — see the verification badges on this page for the latest check. The editorial profile (description, strengths and weaknesses) is last generated March 2026, and any user-review themes are pulled from G2.