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Head-to-head · Ai E Mail Tool

Klaviyo vs Mailjet

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Klaviyo #1 in Ai E Mail Tool 9.3/10 Free plan Free plan✓ 0 of 3 features Visit Klaviyo
Mailjet #8 in Ai E Mail Tool 8.6/10 Free plan · 30-day trial Free planFree trial✓ 0 of 3 features Visit Mailjet

Klaviyo leads on 0 checks, Mailjet on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreKlaviyo · 9.3/10
  • Free planboth
  • Free trialonly Mailjet

Klaviyo scores higher on our rubric for ai e mail tool: 9.3 against 8.6 out of 10; our editors rank them #1 and #8.

Klaviyo is the better fit for ecommerce teams running email and SMS campaigns. Mailjet is the better fit for teams needing campaigns plus API or SMTP sending.

  • Klaviyo fits best

    Ecommerce teams running email and SMS campaigns

  • Mailjet fits best

    Teams needing campaigns plus API or SMTP sending

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Side by side

Feature Klaviyo 9.3/10 Visit ↗ Mailjet 8.6/10 Visit ↗
At a glance
Editor score 9.3 8.6
Ranking #1 in Ai E Mail Tool #8 in Ai E Mail Tool
Best for Ecommerce teams running email and SMS campaigns Teams needing campaigns plus API or SMTP sending
Pricing model Free plan + paid Free plan + paid
Starting price — —
Free plan ✓ ✓
Free trial — 30 days
Deployment Cloud Cloud
Platforms Web Web
Support Email, Live chat, Community, Docs · 24/7 Live chat, Phone, Tickets, Docs
Compliance ISO 27001, PCI DSS SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, SSO/SAML
Integrations 350+ integrations 100+ integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Klaviyo 0/3 · Mailjet 0/3
Email generation Not checked yet Not checked yet
Personalization Not checked yet Not checked yet
Brand voice controls Not checked yet Not checked yet
Specs
Email workflows Not checked yet Not checked yet
Supported languages Not checked yet Not checked yet
Email integrations Not checked yet Not checked yet
Our review
Pros
  • Automates email, SMS, and push flows using behavioral data
  • Segments audiences in real time and supports A/B testing
  • Connects with 350+ integrations, including Shopify and CRMs
  • Combines campaign automation, segmentation and landing-page creation.
  • Supports transactional sending through a RESTful API and SMTP relay.
  • Includes AI-assisted content and segmentation, plus team collaboration.
Cons
  • Free plan is limited to 250 active profiles and 500 monthly email sends
  • Free-plan email support lasts only the first 60 days
  • Paid Email plan's price is not displayed in the plan details
  • The Free plan is capped at 2,000 subscribers and 8,000 monthly sends.
  • The listed deployment is cloud-based.
  • Advanced statistics and automations are highlighted on Premium, not Free.
Our verdict

Klaviyo brings email marketing, SMS, customer data, segmentation, and analytics together for consumer brands. Ecommerce teams can create campaigns and automated flows, use behavioral data to shape audiences, and track performance through…

Read the review →

Mailjet brings email campaigns and transactional sending together for marketing teams, developers, small and midsize businesses, and enterprises. Campaign tools include a drag-and-drop editor, reusable templates, forms, audience…

Read the review →
  1. KlaviyoAi E Mail Tool 9.3Free plan
  2. MailjetAi E Mail Tool 8.6Free plan · 30-day trial

Strengths and trade-offs

  • Klaviyo — where it wins

    • Automates email, SMS, and push flows using behavioral data
    • Segments audiences in real time and supports A/B testing
    • Connects with 350+ integrations, including Shopify and CRMs

    Where it doesn't

    • Free plan is limited to 250 active profiles and 500 monthly email sends
    • Free-plan email support lasts only the first 60 days
    • Paid Email plan's price is not displayed in the plan details

  • Mailjet — where it wins

    • Combines campaign automation, segmentation and landing-page creation.
    • Supports transactional sending through a RESTful API and SMTP relay.
    • Includes AI-assisted content and segmentation, plus team collaboration.

    Where it doesn't

    • The Free plan is capped at 2,000 subscribers and 8,000 monthly sends.
    • The listed deployment is cloud-based.
    • Advanced statistics and automations are highlighted on Premium, not Free.

More comparisons

All ai e mail tool comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update