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Email Marketing Comparison

Klaviyo vs. Sender

At a glance

At a glance

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

Sender

Best for

Best for small businesses that want email and SMS together on a budget, with a generous free plan and pricing that scales with the list.

  • Freelancers
  • Small and mid-sized
  • Enterprise

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

Full Comparison

Criterion Klaviyo Sender
Starting price 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. From $7 / month Standard plan for up to 1,000 subscribers and 12,000 emails per month; the price scales with the subscriber count. A Free Forever plan covers up to 2,500 subscribers and 15,000 emails per month.
Free trial Free plan for up to 250 active profiles and 500 email sends per month, plus $5 of mobile messages a month Free Forever plan for up to 2,500 subscribers and 15,000 emails per month, with Sender branding
API Yes, a REST API with webhooks, SDKs, warehouse syncs and more than 350 integrations Not stated
Hosting Cloud (SaaS) Cloud (SaaS)
Made in United States Not stated
Campaign types Yes, email campaigns with SMS and push from the same customer profiles Yes, email newsletters and campaigns, plus SMS on paid plans and transactional email, with A/B testing
Automation and journeys Yes, automation flows triggered by customer behaviour and events Yes, unlimited marketing automation
Segmentation and personalisation Yes, real-time segmentation with predictive analytics on unified customer profiles Yes, unlimited segmentation for targeted messaging
Templates and editor Yes, a drag-and-drop email editor with templates Yes, a drag-and-drop builder with 1,600+ mobile-responsive templates and a custom HTML editor
Deliverability and testing Yes, deliverability tools with reporting and revenue attribution Yes, with 24/7 IP monitoring and sender-reputation tracking, plus A/B testing for subject lines, content and send times
Ecommerce and CRM data Yes, a customer data platform with deep ecommerce data and more than 350 integrations including Shopify and WooCommerce Yes, integrations for Shopify, WooCommerce, PrestaShop and WordPress
Integrations and API Yes, a REST API with webhooks, SDKs and warehouse syncs Yes, integrations including WordPress, WooCommerce, Shopify, PrestaShop and Zapier
AI features stated Yes No
Deployment Cloud (SaaS), Browser-based Cloud (SaaS), Browser-based
Support more entries Email helpdesk, Chat, Community forum Chat, 24/7
Onboarding Documentation and knowledge base, Live online demos and webinars, Personal consulting Not stated
Company size Freelancers, Small and mid-sized, Enterprise Freelancers, Small and mid-sized, Enterprise
Integrations more entries Shopify, Magento 1.x, Magento 2.x, BigCommerce, WooCommerce, Wix, OpenCart, PrestaShop, Spree, Shift4Shop, Volusion WordPress, WooCommerce, Shopify, PrestaShop, Zapier

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

  • Starting price Klaviyo Free plan for up to 250 active profiles and 500 email sends a month Sender From $7 / month
  • Free trial Klaviyo Free plan for up to 250 active profiles and 500 email sends per month, plus $5 of mobile messages a month Sender Free Forever plan for up to 2,500 subscribers and 15,000 emails per month, with Sender branding
  • Support Klaviyo Email helpdesk, Chat, Community forum Sender Chat, 24/7
  • AI features Klaviyo Yes Sender No
  • Campaign types Klaviyo Yes, email campaigns with SMS and push from the same customer profiles Sender Yes, email newsletters and campaigns, plus SMS on paid plans and transactional email, with A/B testing

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

The trade-offs

Strengths and Limitations

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

Sender

Strengths

  • Free plan for up to 2,500 subscribers and 15,000 emails per month
  • Email plus SMS from paid plans, with unlimited automation and segmentation
  • 1,600+ responsive templates and a drag-and-drop builder
  • Ecommerce integrations for Shopify, WooCommerce and PrestaShop

Limitations

  • The free plan carries Sender branding
  • SMS is only available on paid plans

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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Sender

  • Free $0 / month Up to 2,500 subscribers and 15,000 emails per month, with Sender branding.
  • Standard From $7 / month Up to 1,000 subscribers and 12,000 emails per month; removes branding and adds SMS and A/B testing. Scales with subscriber count.
  • Professional From $14 / month Up to 1,000 subscribers and 24,000 emails per month; adds advanced automation, more seats and priority support. Scales with subscriber count.
  • Enterprise Not stated Unlimited emails, a dedicated success manager, SSO and phone support, quoted by sales.
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What users say

Review Scores · opens after launch

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.

Sender

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

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

Sender https://www.sender.net · checked against the official source on 2026-08-22

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