Mailgun vs Mailtrap
Mailgun and Mailtrap are both popular choices in the transactional email service space. Both start at $15/mo. Both offer free plans to get started. Both tools work well for developers.
Quick Verdict
Mailgun wins on deliverability, integrations.
Mailtrap wins on rating.
Best for most users: Mailgun (developers).
Mailgun
Developer-focused transactional email API by Sinch
Mailgun is a Sinch-owned transactional email API platform founded in 2010, designed for developers who need reliable, high-volume email delivery via REST API or SMTP. It offers email validation, inbox placement testing, and send-time optimization, making it a solid choice for SaaS companies and engineering teams building custom email workflows.
Mailtrap
Email testing sandbox and transactional sending platform for developers
Mailtrap is a unique platform that combines an email testing sandbox with transactional email sending, purpose-built for development teams. Its sandbox catches test emails before they reach real inboxes while providing spam score analysis and HTML/CSS compatibility checks. The sending API starts at $15/month for 10,000 emails with a generous free tier, making it the go-to choice for developers who need both email testing and production delivery.
Feature Comparison
| Feature | Mailgun | Mailtrap |
|---|---|---|
| Rating | 4.2/5 | 4.8/5 |
| Starting Price | $15/mo | $15/mo |
| Free Plan | 100 emails/day (5,000/month), 1 domain, basic tracking | 4,000 emails/month (150/day), 1 domain + sandbox testing |
| Founded | 2010 | 2013 |
| Email Templates | 25 | 10 |
| Integrations | 40 | 20 |
| Deliverability Rate | 97% | 95% |
| Marketing Automation | No | No |
| A/B Testing | No | No |
| Landing Pages | No | No |
| Segmentation | No | No |
| Drag & Drop Editor | No | No |
| SMS Marketing | No | No |
| Ecommerce Features | No | No |
| API Access | Yes | Yes |
| Multi-Language | No | No |
| Web Push Notifications | No | No |
| Live Chat | No | Yes |
| Advanced Analytics | Yes | Yes |
Mailgun: Pros & Cons
Pros
- + Powerful RESTful API with well-structured SDKs for Python, Ruby, Node.js and more, making integration painless for developers
- + Real-time dashboards for delivery, bounce, spam complaints, and click rates provide clear campaign health visibility
- + Handles very high email volumes reliably with strong deliverability and fast sending speeds
- + Built-in email validation and inbox placement testing tools (Mailgun Optimize) for deliverability optimization
- + Flexible routing rules, webhooks, and event tracking simplify debugging and monitoring email performance
Cons
- − Pricing escalates quickly at higher volumes and premium features like dedicated IPs ($59/mo) and validations cost extra
- − No built-in drag-and-drop email editor or marketing automation features — purely developer-focused
- − Setup requires technical knowledge; non-developers will struggle with DNS configuration and API integration
- − UI dashboard feels outdated in certain sections compared to modern competitors like Resend
- − Lower-tier plans use shared IP addresses which can impact deliverability if other senders have poor practices
Mailtrap: Pros & Cons
Pros
- + Unique email sandbox catches test emails before they reach real inboxes, preventing embarrassing test data leaks
- + Built-in spam score analysis and HTML/CSS compatibility checking during development, not after sending
- + Combined testing and sending platform eliminates the gap between development and production email workflows
- + Generous free tier with 3,500 emails/month for sending plus sandbox access for testing
- + Simple volume-based pricing that covers transactional, marketing, and bulk emails under one subscription
Cons
- − No marketing email features — no automation, segmentation, A/B testing, or campaign management
- − Email sandbox and sending API priced separately, so full functionality costs more than the headline price
- − Limited template builder and design tools — designed for developers who code their own emails
- − Smaller ecosystem and fewer integrations compared to established transactional providers like SendGrid or Postmark
- − No drag-and-drop editor, making it inaccessible for non-technical marketing teams
The Verdict
Mailtrap edges ahead with a 4.8/5 rating compared to Mailgun's 4.2/5. The gap comes mainly from support (5 vs 4.1) and feature depth (4.6 vs 3.8). On deliverability, Mailgun reports 97% compared to 95% for Mailtrap — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Mailgun | Mailtrap |
|---|---|---|---|
| Starting Price | 30% | $15/mo | $15/mo |
| Deliverability | 25% | 97% Winner | 95% |
| Rating | 25% | 4.2/5 | 4.8/5 Winner |
| Integrations | 10% | 40 Winner | 20 |
| Free Tier | 10% | Yes | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Mailgun if…
- + You're a saas companies
- + You're a high volume transactional senders
- + Powerful RESTful API with well-structured SDKs for Python, Ruby, Node.js and more, making integration painless for developers
Choose Mailtrap if…
- + You're a qa teams
- + You're a devops
- + Unique email sandbox catches test emails before they reach real inboxes, preventing embarrassing test data leaks