Alerts
When Larm sounds the alarm, it's real.
85% of monitoring alerts are false positives. That's not a statistic about bad services. It's a statistic about bad monitoring. When your team stops trusting their alerts, they stop responding to them. The real outage that happens at 3 AM gets the same shrug as the five false alarms before it.
Alert pipeline
Three layers before your phone buzzes
An alert from Larm has survived three layers of verification. First, multiple probes across different continents had to independently confirm the failure. Then, a strict majority vote had to agree. Finally, the failure had to persist through the confirmation window.
By the time your phone buzzes, it's not a question of "is this real?" It's real.
From check to alert
Probes check your service independently from multiple locations
Majority vote determines whether the service is actually down
Confirmation window ensures the failure persists, not a brief blip
Alert dispatched to your configured channels simultaneously
Integrations
Alert where your team already works.
14 built-in integrations. No marketplace, no plugins to install, no third-party apps to authorize. Set up a channel, attach it to your monitors, done.
TEAM CHAT
INCIDENT MANAGEMENT
PUSH NOTIFICATIONS
DEVELOPER
Smart defaults
Alerting that takes care of itself.
Default channels
Set channels as defaults and they'll be attached to every new monitor automatically. No more forgetting to hook up alerting on a new check.
Broken channel detection
If a delivery fails, we mark the channel as broken and show it in your dashboard. You'll know before the next outage that your Slack webhook expired or your PagerDuty key rotated.
Test alerts
Send a test alert to any channel before you rely on it. Verify the webhook URL, the Slack channel, the email address. Rate limited to prevent spamming, but always available.
Daily alert limits
If a monitor is flapping between up and down every few minutes, your inbox shouldn't pay for it. Per-org daily limits prevent a single misbehaving monitor from burning through your alert budget.
SSL certificate monitoring
Expired SSL certificates are embarrassing outages that are entirely preventable. Larm checks your certificates hourly and alerts you before they expire. You pick the warning threshold. No extra configuration, no separate tool. If you're monitoring an HTTPS endpoint, we're already watching the certificate.
Alerts you can trust.
13 integrations on the free plan. No per-alert fees. No noise.
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