Klaviyo vs Sender

Klaviyo9.3Visit Sender7.5Visit

Higher score Klaviyo #1 in Email Marketing Software 9.3/10 Free plan Free plan✓ 4 of 4 features Visit Klaviyo

vs

Sender #18 in Email Marketing Software 7.5/10 Free plan Free plan✓ 4 of 4 features Visit Sender

• Klaviyo fits best

  Advanced ecommerce personalization

• Sender fits best

  Free email and SMS automation

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Side by side

Feature	Klaviyo 9.3/10 Visit ↗	Sender 7.5/10 Visit ↗
At a glance
Editor score	9.3	7.5
Ranking	#1 in Email Marketing Software	#18 in Email Marketing Software
Best for	Advanced ecommerce personalization	Free email and SMS automation
Pricing model	Free plan + paid	Free plan + paid
Starting price	—	$108/yr
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Live chat, Community, Docs · 24/7	Email, Live chat, Docs · 24/7
Compliance	ISO 27001, PCI DSS	GDPR, SSO/SAML
Integrations	350+ integrations	20 integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Klaviyo 4/4 · Sender 4/4
Email automation	✓	✓
Audience segmentation	✓	✓
Landing pages	✓	✓
A/B testing	✓	✓
Specs
Subscriber limit	Not checked yet	500 contacts
Monthly send limit	15000 emails/mo (best)	6000 emails/mo
Native integrations	350 integrations	Not checked yet
Our review
Pros	Behavior-triggered flows and dynamic audience segmentation Unified customer profiles support personalized targeting Email, SMS, and mobile push campaigns in one platform	Free Forever includes 2,500 subscribers and 15,000 monthly emails Visual automation, segmentation, landing pages, and A/B testing Supports SMS, transactional email, ecommerce, and API workflows
Cons	Paid marketing starts at $45 per month Free plan is limited to 250 active profiles Advanced capabilities may exceed simple email-only needs	Standard is limited to 500 subscribers and 6,000 monthly emails Advanced automation and reports require the Professional plan Enterprise features such as SSO and activity logs are tier-specific
Our verdict	Klaviyo is a B2C CRM and email marketing platform for consumer brands, with a particular fit for ecommerce teams focused on personalized customer journeys. It combines email campaigns, automated flows, audience segmentation, unified… Read the review →	Sender brings email campaigns, newsletters, visual automation workflows, segmentation, landing pages, signup forms, popups, SMS, transactional email, and reporting into one web and API-based platform. It is aimed at small businesses,… Read the review →

Strengths and trade-offs

• Klaviyo — where it wins

  • Behavior-triggered flows and dynamic audience segmentation
  • Unified customer profiles support personalized targeting
  • Email, SMS, and mobile push campaigns in one platform

  Where it doesn't

  • Paid marketing starts at $45 per month
  • Free plan is limited to 250 active profiles
  • Advanced capabilities may exceed simple email-only needs

• Sender — where it wins

  • Free Forever includes 2,500 subscribers and 15,000 monthly emails
  • Visual automation, segmentation, landing pages, and A/B testing
  • Supports SMS, transactional email, ecommerce, and API workflows

  Where it doesn't

  • Standard is limited to 500 subscribers and 6,000 monthly emails
  • Advanced automation and reports require the Professional plan
  • Enterprise features such as SSO and activity logs are tier-specific

• Klaviyo9.3/10 · Free plan

  A strong fit for ecommerce teams that need behavioral personalization across channels.

  Visit KlaviyoFull verdict →
• Sender7.5/10 · Free plan

  A broad email and SMS toolkit with a generous free plan for smaller teams.

  Visit SenderFull verdict →