How to Build Your Own Mailgun
Replace Mailgun with a custom build. Transactional Email API Service For Developers
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 37 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Transactional and marketing email delivery
Key Features to Replicate
Top features across 8 categories. See all 37 features
Analytics(6 features)
Classify bounces to understand delivery failures and improve sender reputation
Review detailed email logs to track and troubleshoot email delivery issues with up to 30 days of log retention
Measure campaign success with insightful email analytics including delivery rates, open rates, and engagement metrics
Review email addresses by engagement metrics to improve email success rates
Track user engagement with links in emails to measure campaign effectiveness
+1 more in this category
Security(5 features)
Manage multiple API keys for secure API access and integration
Support for SPF, DKIM, DMARC, and BIMI authentication protocols for email security and authentication
Add multiple users to your account at no additional cost with permissions management
Multi-user access with SAML Single Sign-On integration for enhanced security
Role-based access control with multiple user roles and permission management
Deliverability(4 features)
Access dedicated IP pools for more control over sender reputation and deliverability
Automated warm-up process for new dedicated IPs to establish positive sender reputation
Improve inbox placement rates so more emails land in primary inboxes
Monitor and track sender reputation metrics available on Optimize plan
Core(3 features)
Configure and manage custom sending domains for your email campaigns
Send emails seamlessly into systems with industry-leading reliability, compliance, and speed via RESTful API and SMTP relay
Reliable SMTP infrastructure that allows sending email in seconds without managing your own SMTP servers
List Management(3 features)
Free tool to manage and clean your email list for improved deliverability
Create and manage mailing lists for bulk email campaigns
Automated management of suppressed and bounced email addresses
Validation(3 features)
Remove invalid addresses and high-risk email addresses with the fastest email validation service on the market using cached send data
Email validation API that integrates with ease for real-time email address validation at point of entry
Preview your list health before you validate to see aggregate results
Automation(2 features)
Extract data from incoming emails, enable automated processing, and integrate with other systems
Parse and simplify incoming email with inbound routes to manage and route incoming emails and data to the right place
Content(2 features)
HTML email templates for blast, newsletter, and transactional emails with customizable options
Personalize emails with dynamic recipient variables for personalized content
Cost Calculator
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Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 37 features at very easy complexity.