How to Build Your Own SendGrid
Replace SendGrid with a custom build. The #1 cloud-based email delivery platform
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 45 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 45 features
Analytics(11 features)
Test different subject lines, content, and sending times to optimize campaign performance.
Real-time dashboard showing email sending activity, errors, and account usage.
Detailed insights on email delivery, opens, clicks, bounces, and engagement metrics.
Monitor which links recipients click in your emails with detailed engagement metrics.
Compare performance metrics across multiple campaigns to identify trends and optimize strategy.
+6 more in this category
Marketing(6 features)
Create triggered email sequences based on subscriber behavior and engagement.
Centralized database for managing subscriber lists, segmentation, and contact information.
Drag-and-drop email builder with templates for creating and scheduling marketing campaigns.
Schedule marketing campaigns to be sent at a specific date and time or optimized send time.
Target subscribers based on demographics, behavior, email engagement, and custom attributes.
+1 more in this category
Security(5 features)
Create, revoke, and manage API keys with granular permission levels for security.
Restrict API access to requests from specific IP addresses or domains.
Cryptographic signing of webhook payloads to verify authenticity of inbound events.
SPF, DKIM, and DMARC configuration tools to verify sender identity and prevent spoofing.
Secure account access with two-factor authentication using authenticator apps or SMS.
Deliverability(4 features)
Manage multiple suppression lists including bounces, unsubscribes, and custom lists.
Automatic handling of hard bounces, soft bounces, and suppression list management.
IP warming, authentication setup, and monitoring to maximize email inbox placement.
Automatically filter potentially harmful recipients to protect sender reputation.
Templates(4 features)
Handlebars-based templating engine for creating dynamic, personalized email content.
Visual drag-and-drop editor for creating custom email designs without coding.
Pre-built, responsive email templates for various industries and use cases.
Insert dynamic variables like subscriber name, preferences, and purchase history into emails.
Administration(2 features)
Create and manage sub-accounts with separate credentials and email sending limits.
Assign roles and permissions to team members with customizable access levels.
Advanced(2 features)
Exclusive IP address for sending emails to build and maintain independent sender reputation.
Segment sending IPs by campaign type or customer to maintain separate sender reputation.
Compliance(2 features)
Create managed unsubscribe groups to handle recipient preferences across campaigns.
Built-in list-unsubscribe headers and compliance with CAN-SPAM and GDPR requirements.
Cost Calculator
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Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 45 features at very easy complexity.