Mailgun API
Developer-first transactional email with EU sending option
Freemium
✓ Verified
🇺🇸 United States
Mailgun is a developer-focused transactional email API built by engineers for engineers. Key differentiators include EU email routing (data never leaves the EU), an inbound email routing feature (parse emails into webhooks), powerful email validation API to clean lists, and detailed analytics. The API supports SMTP, REST, and MIME-based sending. A particularly useful feature for European apps is EU data residency — sending from EU infrastructure keeps email data compliant with GDPR. Paid plans start at $15/month for 10,000 emails after the trial period.
API Details
Auth Method
API Key
Pricing Model
Freemium
Free Tier
Yes — 5,000 emails/month for 3 months
Rate Limit
Volume-based by plan
Format
REST / JSON / MIME
Versioning
v3
SLA / Uptime
99.9%
Compliance
GDPR, HIPAA (Business plan), SOC 2
Geographic Restrictions
Global; EU region sending available
Last Verified
2026-02-20
Categories
Frequently Asked Questions
Mailgun offers a trial period with 100 emails per day free. After that, the Flex plan starts at $35/month for 50,000 emails. Scale plans start at $90/month for 100,000 emails with advanced features. Mailgun is positioned more for developers than marketers and is generally priced competitively against SendGrid.
Mailgun is known for its excellent developer API design, comprehensive webhook system, and powerful inbound email parsing. The Routes feature lets you parse incoming emails (extract data, trigger webhooks) without managing an email server. Official SDKs for Python, Ruby, PHP, Java, and Node.js make integration fast. The SMTP interface is also available for legacy applications.
Yes. Mailgun has a separate Email Validation API that checks whether an email address is valid, has a working mailbox, and whether it is disposable or role-based (info@, admin@). Pricing is $0.012 per validation in bulk. This reduces bounce rates and protects sender reputation by catching invalid addresses before sending.
Mailgun can receive emails sent to your domain and forward them to a webhook as parsed JSON u2014 including headers, body (text and HTML), attachments, and extracted fields. This lets you build email-triggered workflows without running your own mail server. Common uses: support ticket creation, receipt parsing, command-driven bots.