How to Build Your Own OneSignal
Replace OneSignal with a custom build. Customer engagement and push notification platform
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 41 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 41 features
Analytics(7 features)
Real-time analytics showing delivery, open rates, clicks, and conversion metrics.
View engagement trends, top performing segments, and user behavior patterns.
Track custom events and user actions to trigger targeted messaging campaigns.
Automatic link shortening and click tracking for message URLs.
View historical messages sent with delivery and engagement metrics.
+2 more in this category
Messaging(6 features)
Display cards in mobile apps with rich content, images, and call-to-action buttons.
Create and send branded email campaigns with advanced personalization and scheduling.
Display targeted in-app messages, banners, and modals to engaged users.
Send Live Activities on iPhone lock screen with real-time updates.
Send targeted push notifications to web and mobile app users with rich media support.
+1 more in this category
Compliance(3 features)
Complete audit trail of user actions, API calls, and system changes.
GDPR, CCPA, and CAN-SPAM compliant messaging with consent management.
Handle unsubscribe requests across all channels with compliance tracking.
Audience Management(2 features)
Create dynamic audience segments based on behavior, demographics, and custom data.
Centralized customer profiles with complete engagement history and attributes.
Automation(2 features)
Build multi-step automated messaging workflows triggered by user actions or events.
Orchestrate customer journeys across push, email, SMS, and in-app channels.
Data Management(2 features)
Import user data from CSV files with field mapping and validation.
Export message and engagement data to data warehouses via scheduled exports.
Email(2 features)
Use custom email sender domains to improve deliverability and brand trust.
SPF, DKIM, and DMARC setup guides and monitoring for email deliverability.
Engagement(2 features)
Route users to specific app screens or pages via push notification clicks.
Control message frequency per user to prevent notification fatigue and unsubscribes.
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 41 features at very easy complexity.