Heroku vs Mailjet 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.
Mailjet
https://www.mailjet.com
Mailjet is a cloud-based email delivery and tracking platform that enables businesses to send marketing and transactional emails. The service provides features for email automation, template design, A/B testing, and advanced analytics for monitoring email performance. As part of Sinch, Mailjet offers comprehensive APIs and SMTP relay services for developers while maintaining user-friendly email marketing tools for marketers.
Quick Comparison
| Detail | Heroku | Mailjet |
|---|---|---|
| Category | Platform as a Service (PaaS) | Email Marketing |
| Starting Price | Contact Sales | Free |
| Plans Available | 0 | 4 |
| Features Tracked | 17 | 17 |
| Founded | 2007 | 2010 |
| Headquarters | San Francisco, USA | Paris, France |
Features
Detailed feature-by-feature comparison
Feature Comparison
| Feature | | |
|---|---|---|
| api | ||
| APIs & SMTP Relay | ||
| CLI Access | ||
| Webhooks | ||
| compliance | ||
| GDPR Compliance | ||
| core | ||
| A/B Testing | ||
| AI Email Generator | ||
| Advanced Segmentation | ||
| Application Metrics | ||
| Autoscaling | ||
| Contact Management | ||
| Dynos | ||
| Email Automation | ||
| Email Editor | ||
| Email Tracking & Analytics | ||
| Form Builder | ||
| Heroku Dashboard | ||
| Heroku Key-Value Store | ||
| Heroku Pipelines | ||
| Heroku Postgres | ||
| Inbox Preview | ||
| Landing Pages | ||
| Managed Inference and Agents | ||
| Multi-language Support | ||
| Personalization | ||
| Real-time Collaboration | ||
| custom | ||
| Buildpacks | ||
| integration | ||
| Add-ons Marketplace | ||
| Apache Kafka on Heroku | ||
| Heroku AppLink | Add-on | |
| Model Context Protocol (MCP) | ||
| security | ||
| Role Management | ||
| SPF/DKIM Authentication | ||
| 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.
Mailjet
From $0/mo
Price Components
- emails: $0/email (6000 included)
- base_subscription: $17/month (15000 included)
- email_previews: $0/preview (500 included)
- email_validations: $0/validation (500 included)
- base_subscription: $27/month (15000 included)
Best For
Small to mid-sized teams and developers needing affordable email automation, robust APIs, and real-time collaboration for targeted marketing campaigns.
Integrations
See which third-party services are supported
Supported Integrations
Coming Soon
Integration comparison data for Heroku, Mailjet 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.
Mailjet
Small to mid-sized teams and developers needing affordable email automation, robust APIs, and real-time collaboration for targeted marketing campaigns.
- Offers real-time collaboration in Passport editor for multiple users to edit campaigns simultaneously with version control.
- Supports A/B testing of up to ten email versions on subject lines, content, and design to boost performance.
- Provides forever free plan with core features and low Essential tier at $17/month for 15,000 emails without daily limits.
- Includes open-source MCP Server for conversational AI queries on campaign analytics like open rates by country.
- Free plan includes daily sending limits and Mailjet branding on emails.
- Lacks dominance compared to market leaders like Mailchimp and Klaviyo in overall share.
Company Info
Company details and background
Heroku
Mailjet
Comparison FAQ
Common questions about comparing Heroku and Mailjet
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