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Head-to-head · SMTP Relay Services

Mailjet vs SocketLabs

  • Updated Sep 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Mailjet #3 in SMTP Relay Services 7.7/10 Free plan · 30-day trial Free plan✓ 0 of 3 features Visit Mailjet
SocketLabs #4 in SMTP Relay Services 7.4/10 From $39.95/mo · 30-day trial ✓ 0 of 3 features Visit SocketLabs

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

Our verdict

  • Highest scoreMailjet · 7.7/10
  • Free planonly Mailjet

Mailjet scores higher on our rubric for smtp relay services: 7.7 against 7.4 out of 10; our editors rank them #3 and #4.

Mailjet offers free plan; SocketLabs doesn't. SocketLabs leads on monthly send limit: 40000 emails/mo versus 8000 emails/mo.

Mailjet is the better fit for teams combining relay and email marketing. SocketLabs is the better fit for mid-volume senders needing inbound parsing.

  • Mailjet fits best

    Teams combining relay and email marketing

  • SocketLabs fits best

    Mid-volume senders needing inbound parsing

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature Mailjet 7.7/10 Visit ↗ SocketLabs 7.4/10 Visit ↗
At a glance
Editor score 7.7 7.4
Ranking #3 in SMTP Relay Services #4 in SMTP Relay Services
Best for Teams combining relay and email marketing Mid-volume senders needing inbound parsing
Pricing model Free plan + paid Paid
Starting price Not published $39.95/mo
Free plan ✓ (best) —
Free trial — —
Free trial length 30 days 30 days · no card needed
Deployment Cloud Cloud
Platforms Web Web
Support Live chat, Phone, Tickets, Docs Email, Live chat, Phone, Tickets, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, SSO/SAML SOC 2, GDPR
Integrations 100+ integrations 3 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Mailjet 0/3 · SocketLabs 0/3
Inbound email parsing Not published Not published
Event webhooks Not published Not published
Subaccounts Not published Not published
Specs
Monthly send limit 8000 emails/mo 40000 emails/mo (best)
Dedicated IP option Not published Not published
Email log retention Not published Not published
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
  • Inbound email parsing delivers messages as JSON to HTTP endpoints.
  • SMTP relay, injection API, webhooks, templates, and reporting in one platform.
  • Dedicated IP options and plans for senders above 1M emails per month.
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
  • No permanent free plan is available.
  • The Core plan includes only 10 days of insight history.
  • Few verified integrations limit prebuilt ecosystem connections.
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 →

SocketLabs is an email delivery platform for developers, IT teams, and organizations sending transactional or marketing email. It supports SMTP relay sending and an HTTP injection API for outbound messages, while its inbound email parsing…

Read the review →
  1. MailjetSMTP Relay Services 7.7Free plan · 30-day trial
  2. SocketLabsSMTP Relay Services 7.4From $39.95/mo · 30-day trial

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

  • SocketLabs — where it wins

    • Inbound email parsing delivers messages as JSON to HTTP endpoints.
    • SMTP relay, injection API, webhooks, templates, and reporting in one platform.
    • Dedicated IP options and plans for senders above 1M emails per month.

    Where it doesn't

    • No permanent free plan is available.
    • The Core plan includes only 10 days of insight history.
    • Few verified integrations limit prebuilt ecosystem connections.
  • Mailjet7.7/10 · Free plan · 30-day trial

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

    Visit MailjetFull verdict →
  • SocketLabs7.4/10 · From $39.95/mo · 30-day trial

    A capable relay for mid-volume teams that need inbound email workflows.

    Visit SocketLabsFull verdict →

More comparisons

All SMTP relay services comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update