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Head-to-head · SMTP Relay Services

Postmark vs Maileroo

  • Updated Sep 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Postmark #2 in SMTP Relay Services 8.2/10 Free plan · paid from $15/mo Free plan✓ 0 of 3 features Visit Postmark
Maileroo #7 in SMTP Relay Services 6.7/10 Free plan Free plan✓ 0 of 3 features Visit Maileroo

Postmark leads on 0 checks, Maileroo 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 scorePostmark · 8.2/10
  • Free planboth

Postmark scores higher on our rubric for smtp relay services: 8.2 against 6.7 out of 10; our editors rank them #2 and #7.

Postmark is the better fit for transactional teams needing streams and templates. Maileroo is the better fit for developers wanting broad transactional-email coverage.

  • Postmark fits best

    Transactional teams needing streams and templates

  • Maileroo fits best

    Developers wanting broad transactional-email coverage

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

Side by side

Feature Postmark 8.2/10 Visit ↗ Maileroo 6.7/10 Visit ↗
At a glance
Editor score 8.2 6.7
Ranking #2 in SMTP Relay Services #7 in SMTP Relay Services
Best for Transactional teams needing streams and templates Developers wanting broad transactional-email coverage
Pricing model Free plan + paid Free plan + paid
Starting price $15/mo Not published
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Live chat, Docs Email, Live chat, Docs
Compliance GDPR, 2FA GDPR, 2FA, SSO/SAML
Integrations 12 integrations 3 integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Postmark 0/3 · Maileroo 0/3
Inbound email parsing Not published Not published
Event webhooks Not published Not published
Subaccounts Not published Not published
Specs
Monthly send limit 10000 emails/mo Not published
Dedicated IP option Not published Not published
Email log retention Not published Not published
Our review
Pros
  • Separate transactional and broadcast message streams
  • Inbound parsing with JSON webhooks and delivery events
  • Reusable templates with previews, variables, and test sends
  • Free tier includes outbound and inbound email allowances
  • Supports SMTP, REST delivery, webhooks and inbound routing
  • Integrates with PHP, Laravel, Node.js, Python, Go, .NET and Java
Cons
  • Free plan allows only 100 emails per month
  • Listed paid plans include 10,000 emails per month
  • Dedicated IPs are limited to eligible high-volume customers
  • Free Plan is limited to 3,000 outbound emails monthly
  • Paid SMTP plan provides 25,000 emails per month
  • Dedicated IP options are aimed at higher-volume sending
Our verdict

Postmark is an email delivery service for application teams sending transactional and broadcast messages through REST APIs or SMTP. It supports application email, individual or batch messages, reusable HTML and plain-text templates,…

Read the review →

Maileroo is an email delivery platform for developers, startups, agencies and enterprises. It supports transactional, bulk and scheduled email through a RESTful API or SMTP relay, while inbound email routing connects incoming messages to…

Read the review →
  1. PostmarkSMTP Relay Services 8.2Free plan · paid from $15/mo
  2. MailerooSMTP Relay Services 6.7Free plan

Strengths and trade-offs

  • Postmark — where it wins

    • Separate transactional and broadcast message streams
    • Inbound parsing with JSON webhooks and delivery events
    • Reusable templates with previews, variables, and test sends

    Where it doesn't

    • Free plan allows only 100 emails per month
    • Listed paid plans include 10,000 emails per month
    • Dedicated IPs are limited to eligible high-volume customers
  • Maileroo — where it wins

    • Free tier includes outbound and inbound email allowances
    • Supports SMTP, REST delivery, webhooks and inbound routing
    • Integrates with PHP, Laravel, Node.js, Python, Go, .NET and Java

    Where it doesn't

    • Free Plan is limited to 3,000 outbound emails monthly
    • Paid SMTP plan provides 25,000 emails per month
    • Dedicated IP options are aimed at higher-volume sending
  • Postmark8.2/10 · Free plan · paid from $15/mo

    A focused SMTP and API service for transactional email, streams, templates, and events.

    Visit PostmarkFull verdict →
  • Maileroo6.7/10 · Free plan

    A developer-focused SMTP and API service with inbound routing, webhooks, templates and analytics.

    Visit MailerooFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update