Best Transactional Email · head-to-head
Mailgun vs MailerSend
A sourced, side-by-side comparison for transactional email. Mailgun has the lower entry price. Every figure links to the vendor's own page and the date we captured it.
At a glance
- Price: Mailgun $0/mo vs MailerSend $0/mo — Mailgun is cheaper to start.
- Free tier: Mailgun Yes; MailerSend Yes.
- HIPAA: Mailgun —; MailerSend —.
Side by side
| Mailgun | MailerSend | |
|---|---|---|
| Entry price | $0/mo (Free) | $0/mo (Free) |
| Free tier | Yes | Yes |
| HIPAA (BAA) | — | — |
| SOC 2 | Yes | — |
| GDPR | Yes | Yes |
| Best for | Developers needing a mature API with SDKs across 6+ languages | SaaS teams needing both transactional email and SMS from one API |
Sources — Mailgun: mailgun.com (verified 2026-06-13). MailerSend: mailersend.com (verified 2026-06-13).
Key features
Mailgun: SOC 2 Type II and ISO/IEC 27001 certified (under Sinch ownership); Real-time email validation API to clean lists before sending; Inbound email parsing and routing (webhooks from received emails); Send-time optimization for per-recipient best delivery timing; SAML SSO on Scale tier and above
MailerSend: Drag-and-drop, HTML, and rich-text template editors in one platform; Transactional SMS API for US and Canada alongside email; DMARC monitoring dashboard; MCP server integration (advertised as NEW feature); GDPR-compliant data handling with EU data residency support