Server Alerts That Tell You What Matters - Nothing More

You set the thresholds, you choose the channels, you decide what matters. No black-box anomaly detection. No ML model that cries wolf. Just clear rules that fire when your infrastructure needs attention.

Start Free - 5 Servers

No credit card required · 2-minute setup

FiveNines server alerting dashboard

Custom Thresholds

Set alert rules on any metric - CPU, memory, disk space, disk I/O, network, load average, swap, and more. Define warning and critical levels independently.

Six Notification Channels

Email, Slack, Telegram, Discord, Pushover, and webhooks. Route different alerts to different channels based on severity.

Per-Server Rules

Your database server at 80% memory is fine. Your web server at 80% means something's leaking. Set thresholds per server, per metric.

Example Alert Rules

Alert when CPU usage exceeds 90% for more than 5 minutes
Alert when disk space drops below 10% on any partition
Alert when memory usage exceeds 85% sustained
Alert when a monitored service goes down
Alert when a cron job fails or runs late

Alert History & Context

Every alert is logged with the metric value that triggered it, when it started, when it resolved, and how long it lasted. When you're doing a post-mortem, you have a clear timeline of what happened and when.

Without Fivenines

You SSH into servers periodically, run htop, eyeball the numbers, and hope nothing broke between checks.

With Fivenines

You set thresholds once. Your phone stays quiet until something actually needs your attention. You fix the issue before users notice.

Frequently Asked Questions

Can I set different alert thresholds for different servers?
Yes. Each server can have its own alert rules. A database server and a web server can have completely different thresholds for the same metric.
How fast are alerts delivered?
Alerts fire within seconds of a threshold being crossed and are delivered to your chosen channel immediately. With 5-second metric collection, you're notified faster than most monitoring tools can even detect the issue.
Can I mute alerts during maintenance windows?
Yes. You can temporarily disable alerts for specific servers or metrics when performing planned maintenance.
Will I get spammed with alerts if a metric flickers around a threshold?
You can configure sustained duration requirements - for example, "alert only if CPU is above 90% for more than 5 minutes." This prevents flapping alerts from transient spikes.
Can I send alerts to multiple channels at once?
Yes. A single alert rule can notify via email and Slack simultaneously, or any combination of channels.

Related Features

Docker Monitoring

Set alerts on per-container CPU, memory, and network metrics.

Cron Job Monitoring

Get alerted when scheduled tasks fail, run late, or take too long.

Proxmox Monitoring

Set per-VM and per-host alert thresholds on your Proxmox infrastructure.

Custom Dashboards

Visualize alert history and metric trends in custom dashboard views.

See how Fivenines compares: vs HetrixTools · vs Netdata

Set up alerts that actually matter

Start Free - 5 Servers

Free tier includes 5 servers - no credit card required

Learn more: Why smart alerts beat smart algorithms