Free
$0
For side projects.
- 3 servers
- 5 uptime monitors
- 2 team members
- 24 hours of history
- Email alerts
14 days of Pro, free. No card.
Know before your users do.
A small agent on each Linux machine. It watches usage, certificates, cron jobs and sites, and tells you in plain language when something is wrong.
What it watches
-
Server metrics
CPU, memory, disk, load and network from a small agent.
-
Alerts
A condition has to last before it pages anyone. Bursts become one message.
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Uptime and SSL
HTTP, ping, TCP and DNS checks, plus certificate and domain expiry.
-
Heartbeats
A backup or cron job that did not run, failed, or took too long.
-
Status pages
A public page with uptime history, email subscriptions and RSS.
-
Teams
Roles, on-call, quiet hours and an activity log.
Alerts go to
- Slack
- Telegram
- Discord
- Microsoft Teams
- Phone push
- Webhooks
Install
Name the server, paste the command, and choose who should hear about it. The agent only makes outbound HTTPS requests.
curl -fsSL https://alertly.net/agent/install.sh \
| sudo bash -s -- --token=your-tokenPricing
Start with 14 days of Pro free. No card needed.
Pro Popular
$12 /mo
For freelancers and small apps.
- 15 servers
- 50 uptime monitors
- 5 team members
- 30 days of history
- Slack, Telegram, Discord
Team
$49 /mo
For growing teams.
- 75 servers
- 200 uptime monitors
- 25 team members
- 90 days of history
- Roles, incidents, status pages
Enterprise
Custom
For large fleets.
- Unlimited servers
- Unlimited uptime monitors
- Unlimited team members
- Custom retention
- SSO and priority support
Prices exclude sales tax or VAT where it applies. Cancel any time.
Questions
Which servers does the agent support?
Any Linux server with systemd on amd64, arm64 or armv7: Ubuntu, Debian, RHEL, Rocky, Alma, Fedora, Amazon Linux and more. It works on cloud VMs, dedicated servers and Raspberry Pis.
Will the agent slow my server down?
No. It's a single small binary that wakes up once a minute and uses very little CPU and memory.
What data does the agent send?
Only measurements and names: usage figures, service and container states, the busiest processes, listening ports, and counts of failed SSH logins and out-of-memory kills. Never file contents, command lines, environment variables or log lines.
Do I need to open any ports?
No. The agent only makes outbound HTTPS requests, so it works behind NAT and firewalls.
How do I stop alert fatigue?
Rules only fire after a condition lasts as long as you choose, bursts are grouped into one summary, and quiet hours and escalation decide who hears what and when.
Can my customers see my status?
Yes. Publish a status page with the components you choose, under the names you choose. Visitors can subscribe by email or RSS.
Is there a free plan?
Yes. New accounts start with a free trial of a paid plan, no card needed. Afterwards you can subscribe, or keep going on the free plan.
Can I cancel any time?
Yes. Cancel from the Billing page and you keep your plan until the end of the period you paid for. Invoices are always available to download.
Put it on one server.
The install takes a couple of minutes. Disk, certificates and missed backups come to you after that.
Start for free