Heroku vs Mailgun Comparison
Detailed comparison of features, pricing, and capabilities
Last updated April 4, 2026
Overview
Compare key metrics and features at a glance
Heroku
https://www.heroku.com
Heroku is a cloud platform as a service (PaaS) that enables companies to build, deliver, monitor and scale applications. The platform supports several programming languages and allows developers to deploy, manage, and scale modern apps without having to manage the underlying infrastructure. Heroku was acquired by Salesforce in 2010 and has since become one of the most popular PaaS solutions for web application deployment.
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.
Quick Comparison
| Detail | Heroku | Mailgun |
|---|---|---|
| Category | Platform as a Service (PaaS) | Email Marketing |
| Starting Price | Contact Sales | Free |
| Plans Available | 0 | 5 |
| Features Tracked | 17 | 16 |
| Founded | 2007 | 2010 |
| Headquarters | San Francisco, USA | San Francisco, USA |
Features
Detailed feature-by-feature comparison
Feature Comparison
| Feature | | |
|---|---|---|
| api | ||
| CLI Access | ||
| RESTful Email APIs | ||
| compliance | ||
| Suppression Lists | ||
| core | ||
| Application Metrics | ||
| Autoscaling | ||
| Bounce Classification | ||
| Dynos | ||
| Email Template Builder | ||
| Email Validation API | ||
| Heroku Dashboard | ||
| Heroku Key-Value Store | ||
| Heroku Pipelines | ||
| Heroku Postgres | ||
| Inbound Routing | ||
| Inbox Placement | ||
| List Segmentation | ||
| Managed Inference and Agents | ||
| Multi-language Support | ||
| Rapid Fire | ||
| SMTP Relay | ||
| Send Time Optimization | ||
| Tracking & Analytics | ||
| custom | ||
| Buildpacks | ||
| Custom Sending Domains | ||
| Dedicated IPs | Add-on | |
| integration | ||
| Add-ons Marketplace | ||
| Apache Kafka on Heroku | ||
| Email Parsing | ||
| Heroku AppLink | Add-on | |
| Model Context Protocol (MCP) | ||
| security | ||
| Authentication Protocols | ||
| Security Patches | ||
| support | ||
| Team Collaboration | ||
Pricing
Compare pricing plans and value for money
Heroku
Contact Sales
No pricing data available yet
Best For
Developers and startups needing quick Git-based deploys and managed scaling for modern web apps without infrastructure management.
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.
Integrations
See which third-party services are supported
Supported Integrations
Coming Soon
Integration comparison data for Heroku, Mailgun is being collected and will be available soon.
Strengths & Limitations
Key strengths and limitations of each service
Heroku
Developers and startups needing quick Git-based deploys and managed scaling for modern web apps without infrastructure management.
- Git push deployment and dyno autoscaling enable instant scaling for web apps, unlike more complex setups on AWS or Azure.
- Managed data services like Heroku Postgres and Redis handle backups and HA, freeing developers from infra tasks.
- Native buildpacks for Node.js, Python, Java, and others simplify multi-language deploys versus custom configs elsewhere.
- Doubled 1GB slug limit supports AI/ML frameworks, boosting complex app compatibility.
- Transitioning to sustaining engineering mode limits new features, lagging behind innovative PaaS like Upsun.
- Runs atop AWS EC2 with dyno-based pricing that can escalate costs for high-traffic apps versus granular cloud options.
- Enterprise feature freeze pushes users toward Salesforce alternatives like Agentforce.
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.
Company Info
Company details and background
Heroku
Mailgun
Comparison FAQ
Common questions about comparing Heroku and Mailgun
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