The notification API that scales with your SaaS
Send intelligent alerts to Slack, Telegram, and Email with rich formatting, smart routing, and zero infrastructure. Built for developers who need reliable notifications without the complexity.
Why developers choose alrtr
Built for modern SaaS applications that need reliable, intelligent notifications
Multi-Channel Delivery
Send to Slack, Telegram, and Email simultaneously with rich formatting optimized for each platform
- ✓ Slack blocks & attachments
- ✓ Telegram markdown & keyboards
- ✓ HTML email templates
Intelligent Routing
Smart channel selection based on event type, severity, and user preferences
- ✓ Critical errors → All channels
- ✓ User events → Slack only
- ✓ Summaries → Email only
Developer Experience
Simple REST API with TypeScript SDK, full IntelliSense, and 2-line integration
- ✓ TypeScript SDK
- ✓ Fluent API design
- ✓ Zero dependencies
Rich Event Types
Predefined event types with emoji, colors, and smart formatting
- 🚨 Errors & warnings
- 🎉 User signups
- 💰 Payment events
Anti-Spam Protection
Built-in rate limiting, duplicate detection, and error aggregation
- ✓ Rate limiting per event
- ✓ Duplicate suppression
- ✓ Error aggregation
Zero Infrastructure
No databases, no UI, no maintenance. Just reliable notifications that work
- ✓ Serverless architecture
- ✓ Auto-scaling
- ✓ 99.9% uptime
Get started in minutes
From API key to first notification in under 5 minutes
curl -X POST https://alrtr.app/api \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"message": "🎉 New user signup: john@example.com",
"type": "user_signup",
"app_name": "MyApp",
"severity": "info",
"metadata": {
"user_id": "user_123",
"plan": "pro"
}
}'Request API Key
Get your free API key and configure your notification channels
Integrate
Add a single API call to your application's error handling
Monitor
Receive intelligent notifications across all your channels
Simple, transparent pricing
Start free, scale as you grow
Free
- ✓1,000 notifications/month
- ✓All channels (Slack, Telegram, Email)
- ✓Basic event types
- ✓Community support
Pro
- ✓50,000 notifications/month
- ✓Smart routing & aggregation
- ✓Custom event types
- ✓Priority support
- ✓Advanced analytics
Enterprise
- ✓Unlimited notifications
- ✓Custom integrations
- ✓SLA guarantees
- ✓Dedicated support
- ✓On-premise options
Trusted by developers worldwide
"alrtr saved us weeks of development time. We went from scattered notification code to a unified system in one afternoon."
"The smart routing is incredible. Critical errors go everywhere, user signups just to Slack. It just works."
"Finally, a notification service that doesn't require me to manage infrastructure. The TypeScript SDK is perfect."
Frequently Asked Questions
How is alrtr different from other notification services?
alrtr is built specifically for developers and SaaS applications. Unlike generic services, we provide intelligent routing, predefined event types, and anti-spam protection out of the box. No databases, no UI complexity - just reliable notifications.
What channels are supported?
Currently we support Slack (webhooks and blocks), Telegram (bots and markdown), and Email (HTML templates). We're planning to add Microsoft Teams, Discord, and webhooks in future releases.
Can I customize the message formatting?
Yes! While we provide beautiful defaults for each event type, you can customize colors, emojis, and formatting. The Pro plan includes custom event types with full control over appearance.
Is there a rate limit?
We have generous rate limits: 1000/month on free, 50k/month on Pro. We also include intelligent anti-spam protection that aggregates similar errors and prevents notification fatigue.
How do I get started?
Click "Request Access" above to get your free API key. We'll send you setup instructions for your preferred channels. Most developers are sending notifications with alrtr within 5 minutes.
Ready to upgrade your notifications?
Join thousands of developers who trust alrtr for their critical alerts