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Head-to-head · Transactional Email Software

Postmark vs Infobip Email API

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Postmark #2 in Transactional Email Software 8.6/10 Free plan · paid from $15/mo Free plan✓ 1 of 2 features Visit Postmark
Infobip Email API #5 in Transactional Email Software 7.7/10 60-day trial ✓ 2 of 2 features Visit Infobip

Postmark leads on 1 check, Infobip Email API on 1, 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 scorePostmark · 8.6/10
  • Free planonly Postmark
  • Most featuresInfobip Email API · 2 of 2

Postmark scores higher on our rubric for transactional email software: 8.6 against 7.7 out of 10; our editors rank them #2 and #5.

Postmark offers free plan; Infobip Email API doesn't. Infobip Email API offers event webhooks; Postmark doesn't publish it.

Postmark is the better fit for teams prioritizing message-stream separation. Infobip Email API is the better fit for enterprise teams needing inbound and compliance options.

  • Postmark fits best

    Teams prioritizing message-stream separation

  • Infobip Email API fits best

    Enterprise teams needing inbound and compliance options

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature Postmark 8.6/10 Visit ↗ Infobip Email API 7.7/10 Visit ↗
At a glance
Editor score 8.6 7.7
Ranking #2 in Transactional Email Software #5 in Transactional Email Software
Best for Teams prioritizing message-stream separation Enterprise teams needing inbound and compliance options
Pricing model Free plan + paid Paid
Starting price $15/mo Not published
Free plan ✓ (best) —
Free trial — —
Deployment Cloud Cloud, Browser extension
Platforms Web Web
Support Live chat, Docs Email, Tickets, Community, Docs
Compliance GDPR, 2FA SOC 2, ISO 27001, GDPR, HIPAA
Integrations 12 integrations 4 integrations
Built for Solo, Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Postmark 1/2 · Infobip Email API 2/2
Event webhooks Not published ✓ (best)
Dedicated IP option ✓ ✓
Specs
Delivery methods Not published Both
Template options Not published Both
Delivery log retention Not published 48 days
Monthly send limit 10000 emails/mo Not published
Our review
Pros
  • Separate transactional and broadcast message streams
  • REST API, SMTP sending, inbound parsing, and event webhooks
  • Reusable templates with previews, variables, and test sends
  • Supports both HTTP API and SMTP delivery
  • Combines templates, tracking, webhooks, logs, and reporting
  • Offers inbound processing, dedicated IPs, and IP pools
Cons
  • Free plan allows only 100 emails per month
  • Free plan does not allow overages
  • Advanced inbound processing starts with the Pro plan
  • Pricing varies by country, currency, and message volume
  • No perpetual free plan
  • May be more than needed for basic email sending
Our verdict

Postmark is an email delivery service for application teams sending transactional and broadcast messages through REST APIs or SMTP. It supports web and API access, official libraries for multiple programming languages and frameworks,…

Read the review →

Infobip Email API is a cloud service for programmatic transactional and marketing email. It is designed for developers and enterprise teams sending password resets, order confirmations, alerts, bulk messages, and other…

Read the review →
  1. PostmarkTransactional Email Software 8.6Free plan · paid from $15/mo
  2. Infobip Email APITransactional Email Software 7.760-day trial

Strengths and trade-offs

  • Postmark — where it wins

    • Separate transactional and broadcast message streams
    • REST API, SMTP sending, inbound parsing, and event webhooks
    • Reusable templates with previews, variables, and test sends

    Where it doesn't

    • Free plan allows only 100 emails per month
    • Free plan does not allow overages
    • Advanced inbound processing starts with the Pro plan
  • Infobip Email API — where it wins

    • Supports both HTTP API and SMTP delivery
    • Combines templates, tracking, webhooks, logs, and reporting
    • Offers inbound processing, dedicated IPs, and IP pools

    Where it doesn't

    • Pricing varies by country, currency, and message volume
    • No perpetual free plan
    • May be more than needed for basic email sending
  • Postmark8.6/10 · Free plan · paid from $15/mo

    A focused email delivery service for teams separating transactional and broadcast traffic.

    Visit PostmarkFull verdict →
  • Infobip Email API7.7/10 · 60-day trial

    A programmable email service with delivery controls, inbound processing, and usage-based pricing.

    Visit InfobipFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update