Anomaly Detection
Set smart alerts on misbehaving metrics.
Anomaly detection is the best way to avoid surprises. Get alerted in real-time when metrics go over their limits. Up to date > too late.

Catch issues early
Be alerted when performance metrics deviate from the norm. Monitor all of your critical metrics and keep your app stable.
Filter out the noise
AppSignal filters out temporary metric spikes, alerting you only to real issues. Avoid alert fatigue and maintain focus.
Detect anomalies anywhere
Combine anomaly detection with custom metrics to monitor any part of your app. Receive tailored alerts.
Getting Started
Enable one of many available triggers.
AppSignal collects loads of performance metrics out of the box. Enable one of the default alerts on metrics that are important to you. Now you can run Ruby, Elixir, Node.js and Python apps with confidence.
Error metrics
- Error rate
- Error rate per namespace
- Error count
- Error count per namespace
Performance metrics
- Throughput
- Throughput per namespace
- Action/controller performance
- Queue time
- Queue time per namespace
Custom metrics
- Host metrics
- CPU usage
- Disk I/O and usage
- Load average
- Memory usage
- Swap usage
- Network traffic
Custom metrics
With our custom metrics feature, you can monitor any metric you like. When you combine this with anomaly detection, you’ll get alerts for the metrics that are most important for your application’s health.
Alert Configuration
Avoid noisy alerts with warmups and cooldowns.
Stop drowning in noisy notifications, hello inbox zero. AppSignal’s configuration options make sure you receive the right alerts at the right time.
Warmups before alerts
Configure how soon you get an alert after a metric goes out of its limits. Avoid alerts for short spikes in metrics.
Ongoing alert
Cooldown after incidents
Prevent multiple alerts in a row by setting a cooldown. We’ll create one longer incident instead of multiple short ones.
Alert ended
What our customers think
1500+ development teams rely on AppSignal to ship code with confidence. We are sharing a few of their stories with you.
Previously, we were using Honeybadger, Skylight, and Datadog, but now we have all those apps in one: AppSignal, and that is awesome!
Oleg, Developer at Benuevo
Hey y’all, we’re back. Sentry was just chaos.
Matt, Developer at Supertape
The biggest benefit of using AppSignal is the native Elixir support. … AppSignal just knows how an Elixir app is structured and builds error tracking and performance monitoring around it.
Justin Tormey, CTO at Ampla Technologies
Previously, we were using Honeybadger, Skylight, and Datadog, but now we have all those apps in one: AppSignal, and that is awesome!
Oleg, Developer at Benuevo
Hey y’all, we’re back. Sentry was just chaos.
Matt, Developer at Supertape
The biggest benefit of using AppSignal is the native Elixir support. … AppSignal just knows how an Elixir app is structured and builds error tracking and performance monitoring around it.
Justin Tormey, CTO at Ampla Technologies
We looked at Sentry, Datadog, and Honeybadger. AppSignal gave us everything in one tool for a fraction of the price.
Thilo Rusche, Developer at SportsKey
In New Relic, if you want more features, you have to upgrade… AppSignal’s pricing was easier to understand, and you get all the features for one price.
Devan Sabaratnam, Co-founder & CTO at HR Partner
Second to none support. It’s their developers themselves who are quickly and clearly answering any questions. It’s hard to overstate how nice this is.
Verified G2 Reviewer
We looked at Sentry, Datadog, and Honeybadger. AppSignal gave us everything in one tool for a fraction of the price.
Thilo Rusche, Developer at SportsKey
In New Relic, if you want more features, you have to upgrade… AppSignal’s pricing was easier to understand, and you get all the features for one price.
Devan Sabaratnam, Co-founder & CTO at HR Partner
Second to none support. It’s their developers themselves who are quickly and clearly answering any questions. It’s hard to overstate how nice this is.
Verified G2 Reviewer
Link Dashboards
Link to related dashboards.
Link your alerts to specific dashboards to inspect related metrics and debug issues faster.

Add Notes
Add debugging notes.
Add a few lines of debugging information for when an alert goes off. Your future self and your colleagues will thank you later.

Integrations
Get metric alerts in your tool of choice.
Stop drowning in noisy notifications, hello inbox zero. AppSignal’s configuration options make sure you receive the right alerts at the right time.

Getting started
Bye bye surprises. Hello metric alerts.
Set metrics on anything
Configure unlimited metric alerts on any application metric you can track.
Included in all plans
We keep our plans simple and affordable. That’s why triggers are available in all plan sizes, for free.
For Ruby, Elixir, Node.js & Python
Metric alerts work out of the box for all supported languages and frameworks.
Dev-to-dev support
Need help setting up anomaly detection? Our developer support team is happy to help you.
Make your next crash make sense.
Free for 30 days. No credit card. Two-minute install.