Mailgun vs Postmark Comparison
Detailed comparison of features, pricing, and capabilities
Last updated April 4, 2026
Overview
Compare key metrics and features at a glance
Mailgun
https://www.mailgun.com
Mailgun is a transactional email API service that enables developers to send, receive, and track emails through their applications using RESTful APIs. The service provides powerful email validation, tracking, and analytics features, along with SMTP integration and detailed logs for debugging. Mailgun specializes in handling large volumes of automated emails including notifications, confirmations, and marketing communications.
Postmark
https://postmarkapp.com
Postmark is a transactional email delivery service that helps businesses send and track application emails, ensuring they reach users' inboxes reliably and quickly. The service specializes in delivering time-sensitive emails like password resets, welcome messages, and notifications with detailed analytics and delivery monitoring. Postmark is known for its robust infrastructure and high deliverability rates, making it popular among developers and businesses requiring dependable email delivery.
Quick Comparison
| Detail | Mailgun | Postmark |
|---|---|---|
| Category | Email Marketing | Email Marketing |
| Starting Price | Free | Free |
| Plans Available | 5 | 1 |
| Features Tracked | 16 | 1 |
| Founded | 2010 | 2009 |
| Headquarters | San Francisco, USA | Philadelphia, USA |
Features
Detailed feature-by-feature comparison
Feature Comparison
| Feature | | |
|---|---|---|
| api | ||
| RESTful Email APIs | ||
| compliance | ||
| Suppression Lists | ||
| core | ||
| Bounce Classification | ||
| Email Template Builder | ||
| Email Validation API | ||
| Inbound Routing | ||
| Inbox Placement | ||
| List Segmentation | ||
| Rapid Fire | ||
| SMTP Relay | ||
| Send Time Optimization | ||
| Tracking & Analytics | ||
| Transactional Templates | ||
| custom | ||
| Custom Sending Domains | ||
| Dedicated IPs | Add-on | |
| integration | ||
| Email Parsing | ||
| security | ||
| Authentication Protocols | ||
Pricing
Compare pricing plans and value for money
Mailgun
From $0/mo
Price Components
- base_fee: $0/month
- emails: $0/email (100 included)
- base_fee: $15/month
- emails: $0/email (10000 included)
- overage_emails: $0.0018/email
Best For
Developers and apps needing reliable, high-volume transactional email APIs with validation and tracking, not broad marketing campaigns.
Postmark
From $0/mo
Price Components
- email: $0.0125/email
- email: $0.01/email
Best For
Developers and apps needing reliable, high-deliverability transactional emails like resets and notifications without marketing bloat.
Integrations
See which third-party services are supported
Supported Integrations
Coming Soon
Integration comparison data for Mailgun, Postmark is being collected and will be available soon.
Strengths & Limitations
Key strengths and limitations of each service
Mailgun
Developers and apps needing reliable, high-volume transactional email APIs with validation and tracking, not broad marketing campaigns.
- Developer-centric RESTful APIs and SMTP relay excel for high-volume transactional emails, unlike marketing-focused ESPs like Mailchimp.
- Email Validation API and Inbox Placement reduce bounces and optimize deliverability, key in a growing market.
- Rapid Fire enables burst sending for millions of emails on Scale+ plans, ideal for time-sensitive notifications.
- Flexible overage fees prevent hard caps, supporting seamless scaling from $15/mo Basic plan.
- Holds only 0.22% market share, ranking #27, trailing leaders like Mailchimp and SendGrid.
- Lacks drag-and-drop editors and audience automation of full marketing platforms like HubSpot.
- Higher tiers like Scale at $90/mo required for SSO and dedicated IPs, pricier for advanced needs.
Postmark
Developers and apps needing reliable, high-deliverability transactional emails like resets and notifications without marketing bloat.
- Lightning-fast delivery with publicly shared times and 99% rates for transactional emails.
- Message Streams separate promotional and transactional emails to protect deliverability.
- Seamless ActiveCampaign integration syncs contact data while maintaining top-notch delivery.
- Pay-as-you-go pricing ideal for variable transactional email volumes[service].
- Post-acquisition by ActiveCampaign, user reviews report declining service quality.
- Lacks full marketing automation features, focusing solely on transactional emails.
Company Info
Company details and background
Mailgun
Postmark
Comparison FAQ
Common questions about comparing Mailgun and Postmark
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