How to Build Your Own EmailJS
Replace EmailJS with a custom build. Send Email Directly From Your Code
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 21 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 21 features
Email Features(4 features)
Support for CC and BCC recipient fields in every template
Support for email attachments with varying size limits based on plan (500KB to 30MB)
Full support for HTML emails with visual editor or direct HTML code entry
Emails sent as multipart related with both HTML and plain text versions for compatibility
Security(4 features)
List of domains allowed to process requests
Prevent bots from spamming with IP-based rate limits
Optional reCAPTCHA integration to ensure humans are sending emails
Keeps email service authentication details on server-side to prevent exposure of credentials
Analytics(2 features)
Detailed email history reports with variables input in dashboard with 7-30 day retention depending on plan
Internal analytics or Google Analytics integration
Developer Tools(2 features)
Email API for programmatic email sending
Install SDK and send emails from code with simple API calls
Template Management(2 features)
Create templates with dynamic variables to personalize emails
Easily build parameterized email templates using text editor or code editor with ability to customize from code
Account Management(1 features)
Add multiple users to account with assigned roles and permissions
Contact Management(1 features)
Save and manage contact lists with varying size limits based on plan
Customization(1 features)
Completely white label emails without EmailJS branding
Cost Calculator
Keep Paying EmailJS
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 21 features at very easy complexity.