How to Build Your Own MailerSend
Replace MailerSend with a custom build. Intuitive email API and SMTP for transactional emails with high deliverability
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 40 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 40 features
Email Management(8 features)
Add custom headers to emails for advanced integration and tracking
Add more sending domains beyond plan allowance
Support for email threading to keep conversations organized
Manage and upload files for use in email templates
Receive and integrate incoming emails into applications for reply handling
+3 more in this category
Analytics & Testing(7 features)
Extend searchable activity data retention up to 365 days
Detailed logs of email activity with advanced search and filtering capabilities
Comprehensive analytics to track performance and optimize email campaigns
View and analyze API request logs for debugging and monitoring
A/B testing capabilities to optimize email subject lines, content, and layouts
+2 more in this category
Email Creation(6 features)
Customize email templates with brand colors and logos
Intuitive drag and drop interface for creating professional email templates
Create and manage dynamic email templates with variable support
Advanced HTML editor for custom email template creation
Ready-to-use email templates for common use cases
+1 more in this category
Deliverability(4 features)
Dedicated IP address for high-volume senders with full control over sending reputation
Monitor DMARC authentication for email security and compliance
Monitor additional domains with DMARC for enhanced security
Verify email addresses in bulk or real-time to avoid bounces and maintain domain reputation
Core Sending(3 features)
Send bulk emails to large recipient lists efficiently
Powerful API for sending transactional emails with extensive documentation and support
Plug & play SMTP integration to instantly start sending emails from apps or websites
SMS(3 features)
Additional phone numbers for SMS sending in USA and Canada
API for programmatic SMS sending with transactional support
Send SMS messages for transactional purposes in US and Canada
Customization(2 features)
Customize tracking domain branding for click and open tracking
Remove MailerSend branding from emails for white-label solutions
Integration(2 features)
Model Context Protocol server integration for enhanced functionality
Real-time event notifications for email delivery, bounces, clicks, opens and other actions
Cost Calculator
Keep Paying MailerSend
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 40 features at very easy complexity.