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Head-to-head · SMTP Relay Services

Mailjet vs SendLayer

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Mailjet #3 in SMTP Relay Services 8.7/10 Free plan · 30-day trial Free planFree trial✓ 0 of 3 features Visit Mailjet
SendLayer #6 in SMTP Relay Services 8.1/10 Paid ✓ 1 of 3 features Visit SendLayer

Mailjet leads on 2 checks, SendLayer on 0, and 1 is even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMailjet · 8.7/10
  • Free planonly Mailjet
  • Free trialonly Mailjet
  • Most featuresSendLayer · 1 of 3

Mailjet scores higher on our rubric for smtp relay services: 8.7 against 8.1 out of 10; our editors rank them #3 and #6.

Mailjet offers free plan; SendLayer doesn't. Mailjet leads on monthly send limit: 8000 emails/mo versus 1000 emails/mo.

Mailjet is the better fit for teams combining relay and email marketing. SendLayer is the better fit for wordPress and commerce sites needing relay.

  • Mailjet fits best

    Teams combining relay and email marketing

  • SendLayer fits best

    WordPress and commerce sites needing relay

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Mailjet 8.7/10 Visit ↗ SendLayer 8.1/10 Visit ↗
At a glance
Editor score 8.7 8.1
Ranking #3 in SMTP Relay Services #6 in SMTP Relay Services
Best for Teams combining relay and email marketing WordPress and commerce sites needing relay
Pricing model Free plan + paid Paid
Starting price — $5/mo
Free plan ✓ (best) —
Free trial 30 days —
Deployment Cloud Cloud
Platforms Web Web
Support Live chat, Phone, Tickets, Docs Tickets, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, SSO/SAML GDPR, 2FA
Integrations 100+ integrations 1,000+ integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Mailjet 0/3 · SendLayer 1/3
Inbound email parsing Not checked yet Not checked yet
Event webhooks Not checked yet ✓ (best)
Subaccounts Not checked yet Not checked yet
Specs
Monthly send limit 8000 emails/mo (best) 1000 emails/mo
Dedicated IP option Not checked yet Not checked yet
Email log retention Not checked yet Not checked yet
Our review
Pros
  • SMTP relay, REST API, and webhooks support transactional delivery
  • Automation, segmentation, A/B testing, and landing pages cover campaign needs
  • Integrations include HubSpot, Shopify, WordPress, and Microsoft Dynamics CRM
  • Supports both API and SMTP relay delivery
  • Includes logs, tracking, bounce, and suppression management
  • Integrates with WordPress, commerce platforms, and frameworks
Cons
  • The Free plan provides basic statistics rather than advanced reporting
  • Automation and A/B testing are listed on paid plans, not the Free plan
  • Its broad marketing scope may exceed the needs of relay-only teams
  • The verified monthly sending limit starts at 1,000 emails
  • There is no free plan
  • Scale pricing is quote-based
Our verdict

Mailjet combines transactional email delivery and email marketing in one web and API-based platform. It is designed for marketing teams, developers, small and medium-sized businesses, and enterprises that need campaign creation alongside…

Read the review →

SendLayer is a transactional email delivery service for websites, applications, developers, and businesses. It accepts outgoing messages through an email API or SMTP relay, then provides delivery logs, open and click tracking, bounce…

Read the review →
  1. MailjetSMTP Relay Services 8.7Free plan · 30-day trial
  2. SendLayerSMTP Relay Services 8.1Paid

Strengths and trade-offs

  • Mailjet — where it wins

    • SMTP relay, REST API, and webhooks support transactional delivery
    • Automation, segmentation, A/B testing, and landing pages cover campaign needs
    • Integrations include HubSpot, Shopify, WordPress, and Microsoft Dynamics CRM

    Where it doesn't

    • The Free plan provides basic statistics rather than advanced reporting
    • Automation and A/B testing are listed on paid plans, not the Free plan
    • Its broad marketing scope may exceed the needs of relay-only teams

  • SendLayer — where it wins

    • Supports both API and SMTP relay delivery
    • Includes logs, tracking, bounce, and suppression management
    • Integrates with WordPress, commerce platforms, and frameworks

    Where it doesn't

    • The verified monthly sending limit starts at 1,000 emails
    • There is no free plan
    • Scale pricing is quote-based
  • Mailjet8.7/10 · Free plan · 30-day trial

    A broad email platform pairing SMTP relay with campaigns, automation, and analytics.

    Visit MailjetFull verdict →
  • SendLayer8.1/10 · Paid

    A focused relay service for website and application email, starting at $5 per month billed annually.

    Visit SendLayerFull verdict →

More comparisons

All SMTP relay services comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update