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Email Marketing Comparison

Iterable vs. Klaviyo

At a glance

At a glance

Iterable

Best for

Best for enterprise marketing teams running email together with mobile channels such as in-app, Mobile Inbox and embedded messages.

  • Enterprise

Klaviyo

Best for

Best for ecommerce and B2C teams that want email and SMS driven by a customer data platform with real-time segmentation and deep store data.

  • Freelancers
  • Small and mid-sized
  • Enterprise

Cataleo does not name a winner. Both statements come from the vendors themselves.

Full Comparison

Criterion Iterable Klaviyo
Starting price Not stated Free plan for up to 250 active profiles and 500 email sends a month The free plan also carries $5 of mobile messages and $5 of Composer usage a month, with email support for the first 60 days. Paid plans scale with the number of active profiles and the message volume on top.
Free trial Not stated Free plan for up to 250 active profiles and 500 email sends per month, plus $5 of mobile messages a month
API Yes, a REST API for lists, events, user data, revenue tracking and campaign triggers, with native SDKs for Android, iOS and React Native Yes, a REST API with webhooks, SDKs, warehouse syncs and more than 350 integrations
Hosting Cloud (SaaS) Cloud (SaaS)
Made in United States United States
Campaign types Yes, email, SMS, push notifications, web push, in-app messages, Mobile Inbox and embedded messages Yes, email campaigns with SMS and push from the same customer profiles
Automation and journeys Yes, cross-channel journeys and workflows with milestones synchronised across touchpoints, plus Nova Agents for journey optimisation Yes, automation flows triggered by customer behaviour and events
Segmentation and personalisation Yes, real-time audience segmentation on behavioural, product and engagement data, with Nova Decisioning for next best action Yes, real-time segmentation with predictive analytics on unified customer profiles
Templates and editor Yes, five template types covering email, in-app, push, SMS and web push, with an optional WYSIWYG editor alongside the standard editors Yes, a drag-and-drop email editor with templates
Deliverability and testing Yes, spam reports to test whether messages land in the inbox, plus A/B and multivariate experimentation Yes, deliverability tools with reporting and revenue attribution
Ecommerce and CRM data Yes, unifies behavioural, product and engagement data into customer profiles Yes, a customer data platform with deep ecommerce data and more than 350 integrations including Shopify and WooCommerce
Integrations and API Yes, a REST API for lists, event data, user updates, revenue tracking and campaign triggers, with native SDKs for Android, iOS and React Native Yes, a REST API with webhooks, SDKs and warehouse syncs
AI features Yes Yes
Deployment Cloud (SaaS), Browser-based Cloud (SaaS), Browser-based
Support Email helpdesk, Community forum more entries Email helpdesk, Chat, Community forum
Onboarding Documentation and knowledge base, Video tutorials more entries Documentation and knowledge base, Live online demos and webinars, Personal consulting
Company size Enterprise more entries Freelancers, Small and mid-sized, Enterprise
Integrations Not stated Shopify, Magento 1.x, Magento 2.x, BigCommerce, WooCommerce, Wix, OpenCart, PrestaShop, Spree, Shift4Shop, Volusion

Compare more tools

Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.

The short version

Key Differences

  • Company size Iterable Enterprise Klaviyo Freelancers, Small and mid-sized, Enterprise
  • Support Iterable Email helpdesk, Community forum Klaviyo Email helpdesk, Chat, Community forum
  • API Iterable Yes, a REST API for lists, events, user data, revenue tracking and campaign triggers, with native SDKs for Android, iOS and React Native Klaviyo Yes, a REST API with webhooks, SDKs, warehouse syncs and more than 350 integrations
  • Campaign types Iterable Yes, email, SMS, push notifications, web push, in-app messages, Mobile Inbox and embedded messages Klaviyo Yes, email campaigns with SMS and push from the same customer profiles
  • Automation and journeys Iterable Yes, cross-channel journeys and workflows with milestones synchronised across touchpoints, plus Nova Agents for journey optimisation Klaviyo Yes, automation flows triggered by customer behaviour and events

Every line is one datapoint from the table above, picked automatically. Nothing here is written text.

The trade-offs

Strengths and Limitations

Iterable

Strengths

  • Mobile Inbox and embedded messages sit alongside email, SMS, push and web push
  • Real-time segmentation with A/B and multivariate experimentation
  • Nova agents automate audience building and journey optimisation
  • REST API plus native SDKs for Android, iOS and React Native

Limitations

  • No published pricing, every tier is quoted by sales
  • Positioned for enterprise scale rather than small lists
  • The WYSIWYG editor is a project setting rather than the default

Klaviyo

Strengths

  • Customer data platform with unified profiles behind email, SMS and push
  • Real-time segmentation with predictive analytics
  • More than 350 integrations including Shopify and WooCommerce
  • Free plan for up to 250 active profiles

Limitations

  • Pricing scales with the number of active profiles
  • The free plan is limited to 500 email sends a month

Plans

Pricing

Klaviyo

  • Free $0 / month Up to 250 active profiles, 500 email sends a month and $5 of mobile messages a month, with email support for the first 60 days.
  • Email Not stated Paid email plan that scales with the number of active profiles, with higher sending allowances.
  • Email and SMS Not stated Adds SMS and mobile messaging on top of the email plan, priced by active profiles and message volume.
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What users say

Review Scores · opens after launch

Iterable

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Klaviyo

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Where this comes from

Where this comes from

Iterable https://iterable.com · checked against the official source on 2026-09-03

Klaviyo https://www.klaviyo.com · checked against the official source on 2026-09-17

This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.