Uptime Kuma: The $0 Monitoring Tool That Makes Pingdom Look Like a Scam

Monitoring is one of those things that feels optional until it isn’t.

Most teams skip it early on. The app works, traffic is manageable, and paid monitoring tools want $15 to $85 a month for something that might matter later. So it goes on the backlog. Then one night a database connection pool fills up, or a cert expires, or a deploy silently fails — and nobody notices until users start complaining.

The frustrating part isn’t the outage. It’s realizing you could have caught it in 20 seconds if you’d had anything watching.

Uptime Kuma is what “anything watching” looks like when it’s done right. It’s a self-hosted monitoring tool — open source, MIT-licensed, 85,600+ stars on GitHub — that covers websites, servers, APIs, databases, DNS, SSL certs, Docker containers, and cron jobs. All from a single dashboard. All for $0.

And it’s genuinely beautiful — which matters more than you’d think when you’re debugging infrastructure at odd hours.

What It Monitors

This isn’t a simple ping checker. Uptime Kuma handles:

• HTTP/HTTPS websites — check every 20 seconds, track response times, validate status codes
• TCP ports — SSH, FTP, SMTP, database connections, any service listening on a port
• Ping (ICMP) — any IP address or domain, with latency tracking
• DNS records — know immediately if someone hijacks your domain or DNS propagation fails
• SSL certificates — get warned before they expire and your site shows the red padlock warning
• Docker containers — monitor services inside your stack without leaving the dashboard
• Steam game servers — yes, even game servers get uptime monitoring
• Keyword monitoring — alert if a specific word appears or disappears from a page
• JSON query monitoring — check API responses for specific values in the payload
• Push monitoring — track cron jobs and scheduled tasks (they push a heartbeat to Kuma)

That last one is underrated. Instead of Kuma checking your service, your cron job pings Kuma on success. If the ping stops, you know the job died. Dead man’s switch monitoring, built in.

90+ Notification Channels (Not a Typo)

When something goes down, Uptime Kuma tells you through:

Telegram, Discord, Slack, Email (SMTP), Pushover, Gotify, PagerDuty, Microsoft Teams, Webhooks, Ntfy, Signal, Matrix, Mattermost, Rocket.Chat, Feishu, Line, and about 75 more.

Ninety. Notification. Channels.

Pingdom gives you email, SMS, and a handful of integrations. UptimeRobot has maybe 15. Uptime Kuma has ninety — and they’re all free, all included, no premium tier required.

The Self-Hosting Advantage Nobody Talks About

Here’s the thing about Pingdom, UptimeRobot, and every other SaaS monitoring tool:

They run on someone else’s infrastructure.

Pingdom pings your site from their servers. If Pingdom goes down, you get a false alert — or worse, you get no alert while your site is actually down. If your app runs on AWS us-east-1 and your monitor runs on AWS us-east-1, they go down together. Your monitoring failed exactly when you needed it most.

Uptime Kuma runs on your machine. Put it on:

• A $4 VPS in a different region than your app
• A Raspberry Pi in your closet
• A free Oracle Cloud instance
• The old laptop under your desk

When your app goes down, your monitor is still up. That’s the whole point.

What Paid Tools Charge Extra For

Let’s talk about what Uptime Kuma includes for free that paid tools gate behind premium tiers:

Feature	Uptime Kuma	Pingdom	UptimeRobot
20-second check intervals	✅ Free	💰 Premium only	💰 Paid plans
Multiple status pages	✅ Unlimited	💰 Extra cost	💰 Pro plan
Unlimited monitors	✅ Yes	💰 Per-monitor pricing	50 free, then 💰
SSL expiry tracking	✅ Built in	💰 Add-on	❌ Not available
90+ notification channels	✅ All included	~10 integrations	~15 integrations
Response time history	✅ Full charts	✅ Yes	✅ Yes
2FA authentication	✅ Built in	✅ Yes	✅ Yes
Your data, your server	✅ Yes	❌ Their cloud	❌ Their cloud

Annual cost comparison:

• Pingdom (equivalent coverage): $1,020/year
• UptimeRobot Team: $348/year
• Datadog (small startup): $6,000+/year
• Uptime Kuma: $0

Installation: One Command

docker run -d \
  --restart=always \
  -p 3001:3001 \
  -v uptime-kuma:/app/data \
  --name uptime-kuma \
  louislam/uptime-kuma:1

That’s it. Open http://your-server:3001, create an account, start adding monitors. No config files. No YAML. No 47-page setup guide.

For non-Docker setups, it’s Node.js-based:

git clone https://github.com/louislam/uptime-kuma.git
cd uptime-kuma
npm run setup
npm start

Status Pages That Don’t Cost Extra

Point status.yourcompany.com at your Uptime Kuma instance and your customers get a beautiful, real-time status page showing:

• Current status of every monitored service
• Uptime percentages over the last 24 hours, 7 days, 30 days, and 90 days
• Incident history with timestamps
• Maintenance windows you schedule in advance

No extra subscription. No per-page pricing. Create as many status pages as you want for different audiences — one for customers, one for internal teams, one per product.

”But I Already Use PM2”

This comes up a lot. If you’re running Node.js apps in production, you probably use PM2 — and you might think it covers monitoring. It doesn’t. They solve completely different problems:

	PM2	Uptime Kuma
What it does	Process manager — keeps your apps running, restarts crashes	Uptime monitor — checks if services are reachable from outside
Scope	Your Node.js processes on one server	Any URL, port, API, DNS, cert, container — anywhere
Restarts crashed apps?	✅ Yes, automatically	❌ No — it tells you something’s down, doesn’t fix it
Knows if users can reach your site?	❌ No — app could be running but nginx is dead, DNS is wrong, or cert expired	✅ Yes — checks the actual endpoint your users hit
Status pages for customers?	❌ No	✅ Beautiful, customizable, unlimited
Notifications (Telegram, Slack, etc.)?	⚠️ Limited (PM2 Plus, paid)	✅ 90+ channels, all free
SSL cert expiry warnings?	❌ No	✅ Built in
Monitors non-Node services?	❌ No — Node.js only	✅ Anything with a URL or port
Cost	Free (open source) / $15+ for PM2 Plus dashboard	Free (open source)

PM2 answers: “Is my process running?” Uptime Kuma answers: “Can my users reach my service?”

Your Node app can show “online” in PM2 while your site is completely unreachable — bad nginx config, expired SSL cert, DNS hijack, full disk, upstream API down. PM2 won’t know. Uptime Kuma will.

The right setup is both: PM2 manages your processes, Uptime Kuma watches the endpoints. They’re complementary, not competing.

Who Shouldn’t Use Uptime Kuma

Let’s be honest about the tradeoffs:

• You need APM, distributed tracing, or log aggregation → Uptime Kuma doesn’t do this. Look at Grafana + Prometheus, SigNoz, or yes, Datadog.
• You don’t want to manage any infrastructure → SaaS tools exist for a reason. If running a single Docker container feels like too much, UptimeRobot’s free tier is fine.
• You need multi-region monitoring → Uptime Kuma checks from one location (where it’s installed). You can run multiple instances, but it’s manual. Paid tools check from dozens of locations automatically.
• You need enterprise compliance and SLAs → Uptime Kuma is MIT-licensed community software. No vendor to call at 2 AM.

For everything else — indie projects, small teams, startups, homelab, personal infrastructure — Uptime Kuma is objectively the best monitoring tool available.

The Numbers

• 85,600+ GitHub stars — more than Grafana (67K), Prometheus (57K), or Netdata (73K)
• 7,670+ forks
• 400+ contributors
• 30+ releases
• MIT license — genuinely open source, no asterisks
• Active since 2021 — mature, battle-tested, continuously improved

Bottom Line

You’re either monitoring your infrastructure or you’re hoping nothing breaks. Hope is not a strategy.

Uptime Kuma gives you the same monitoring capabilities that enterprises pay thousands for — unlimited monitors, beautiful status pages, 90+ notification channels, 20-second checks — on a $4 VPS or a Raspberry Pi.

The next time your site goes down at 3 AM, you’ll know about it in 20 seconds. Not when a customer tweets about it.

GitHub: github.com/louislam/uptime-kuma

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