MailerSend vs Mailtrap
MailerSend and Mailtrap are both popular choices in the transactional email service space. Mailtrap has been around since 2013, giving it a 7-year head start over MailerSend (founded 2020). MailerSend is the more affordable option at $7/mo — that's $8 less per month than Mailtrap's $15/mo entry point. Both offer free plans to get started. MailerSend has the edge with A/B testing, SMS marketing, a drag-and-drop editor.
Quick Verdict
MailerSend wins on price, integrations.
Mailtrap wins on deliverability, rating.
Best for most users: Mailtrap (developers).
MailerSend
Developer-friendly transactional email by the MailerLite team
MailerSend is a transactional email service built by the team behind MailerLite, launched in 2020 with over a decade of email deliverability expertise. It offers a polished developer experience with a full API, SMTP relay, drag-and-drop template builder, and SMS capabilities, making it an ideal choice for SaaS and app developers who need reliable transactional email delivery without the complexity of AWS.
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 | MailerSend | Mailtrap |
|---|---|---|
| Rating | 4.2/5 | 4.8/5 |
| Starting Price | $7/mo | $15/mo |
| Free Plan | 500 emails/month (100/day max), 1 domain, 1 template | 3,500 emails/month (sending) + sandbox testing |
| Founded | 2020 | 2013 |
| Email Templates | 90 | 10 |
| Integrations | 29 | 20 |
| Deliverability Rate | 86.8% | 95% |
| Marketing Automation | ✕ | ✕ |
| A/B Testing | ✓ | ✕ |
| Landing Pages | ✕ | ✕ |
| Segmentation | ✕ | ✕ |
| Drag & Drop Editor | ✓ | ✕ |
| SMS Marketing | ✓ | ✕ |
| Ecommerce Features | ✕ | ✕ |
| API Access | ✓ | ✓ |
| Multi-Language | ✕ | ✕ |
| Web Push Notifications | ✕ | ✕ |
| Live Chat | ✓ | ✓ |
| Advanced Analytics | ✓ | ✓ |
MailerSend: Pros & Cons
Pros
- +Excellent developer experience with SDKs for Node.js, Python, Java, Laravel, PHP, Go, and Ruby
- +Strong deliverability averaging 86.8% inbox placement in EmailToolTester third-party tests (2nd best tested)
- +Intuitive drag-and-drop email builder with 90+ pre-built content blocks for quick template creation
- +Built by the MailerLite team with 10+ years of email deliverability expertise behind the platform
- +Includes SMS API for US and Canada on Starter plans and above at no extra base cost
Cons
- −Free plan reduced from 3,000 to just 500 emails/month in October 2025, with 100/day cap
- −No marketing automation or campaign features; purely transactional and lacks segmentation tools
- −Starter and Professional plans both start at $25/month for same 50,000 emails, confusing tier differentiation
- −Some users report sudden account suspensions for high bounce rates with no refunds offered
- −Pricing can become expensive at scale compared to Amazon SES or Elastic Email ($0.90 per 1,000 overage)
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 MailerSend's 4.2/5. The gap comes mainly from deliverability (4.9 vs 3.2) and feature depth (4.6 vs 4.3). On deliverability, Mailtrap reports 95% compared to 86.8% for MailerSend — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | MailerSend | Mailtrap |
|---|---|---|---|
| Starting Price | 30% | $7/mo | $15/mo |
| Deliverability | 25% | 86.8% | 95% |
| Rating | 25% | 4.2/5 | 4.8/5 |
| Integrations | 10% | 29 | 20 |
| Free Tier | 10% | Yes | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose MailerSend if…
- + You want lower starting costs ($7/mo)
- + You need SMS marketing
- + You need A/B testing
- + You're a developers building transactional email flows
Choose Mailtrap if…
- + You're a developers
- + You're a qa teams
- + Unique email sandbox catches test emails before they reach real inboxes, preventing embarrassing test data leaks