Uptime Kuma vs Checkmk
Checkmk is a monitoring server for a whole fleet: an agent on every host, auto-discovery, SNMP, 2000+ integrations. Uptime Kuma probes your endpoints from outside and publishes a status page your users can read. These are different jobs, and the right answer is often both.
Uptime Kuma vs Checkmk: The Verdict
These sit at opposite ends of the same field, so "which is better" is the wrong question. Checkmk is a full monitoring server you install and operate: agents on each host, auto-discovery, SNMP, and 2000+ pre-built integrations. Its Community edition is free and GPLv2, and Checkmk scopes it at around 100 hosts; Pro starts at EUR 190/month billed annually and Ultimate at EUR 275/month, metered on services rather than hosts at roughly 30 services per host. Uptime Kuma is not a fleet monitor and does not pretend to be. It answers "does this URL still respond" from outside, alerts you, and gives your users a status page to read, for $3/mo. If you run servers, run Checkmk. If you run services other people depend on, run Uptime Kuma. Most teams past a certain size want both, and the Uptime Kuma half belongs off the fleet it is watching.
Last updated: 2026-08-14Quick Comparison
| Feature | Checkmk | Uptime Kuma |
|---|---|---|
| What It Watches | Servers, network gear, cloud, Kubernetes and databases, via agents and SNMP | Any HTTP, TCP, DNS, ping or keyword endpoint, from outside |
| Monitoring Direction | Inside-out - agents report from each host | Outside-in - probes the endpoints your users hit |
| Starting Price | Community free (GPLv2); Pro from EUR 190/mo billed annually; Ultimate from EUR 275/mo | $3/mo on InstaPods (the software is free, MIT) |
| What the Free Tier Covers | Checkmk scopes Community at about 100 hosts, community support only | Unlimited monitors, bounded only by your pod |
| Integrations and Checks | 2000+ pre-built integrations, auto-discovery, SNMP | HTTP, keyword, JSON query, TCP, DNS, ping, WebSocket, push, Docker, Steam servers |
| Public Status Page | You can share a dashboard by public link, but it is an operator view | Purpose-built status pages, each mappable to its own domain |
| What It Runs On | A monitoring server with its own web stack, plus an agent per host | One $3/mo pod: 1 vCPU, 512MB RAM, 10GB |
| Setup | Install the site, roll out agents, tune the discovered services | Instant launch, first monitor added in about a minute |
| Check Interval | Configurable per service, agent-driven | Down to 20 seconds |
| Alerting | Rule-based notification chains with escalation | 90+ notification services |
| Survives Its Own Fleet Failing | No, if the site runs inside the fleet it watches | Yes, when it is hosted somewhere else |
| Pricing Unit | Services, custom metrics and synthetic tests (about 30 services per host) | One flat pod price, no per-monitor billing |
| Source Code | Community edition GPL-2.0; Pro and Ultimate are commercial | MIT, all of it |
What Checkmk Is Not Built For
Trade-offs to weigh before committing.
It Is a Monitoring Server, Not an App You Deploy
Checkmk runs as a site with its own web stack and background processes, plus an agent on every machine you want to see. That is exactly right for a fleet and exactly wrong for "tell me if my landing page starts returning 500s". You would not put it on a $3 pod.
The Free Edition Has a Stated Ceiling
Community is genuinely free and GPL-2.0, with 2000+ integrations, and Checkmk itself scopes it as easily scalable up to about 100 hosts with community support. Past that, or once you want distributed monitoring and vendor support, Pro starts at EUR 190 per month billed annually.
It Is Priced by Services, Not by Sites
Checkmk meters on services, custom metrics and synthetic tests, and reckons roughly 30 services to a host. That is a sensible unit for infrastructure and an odd one if what you actually want is to know whether twelve URLs are answering.
The Dashboard Is for Operators, Not Customers
You can share a Checkmk dashboard by public link, so it is not that a public view is impossible. It is that what gets shared is an operator console of hosts and services, not a branded page with plain-language incident updates that a customer can read during an outage.
Where Uptime Kuma Fits Instead
What you get when you pick this stack.
It Watches From Outside the Fleet
Checkmk sees your fleet from the inside, which means it goes quiet with the fleet. Uptime Kuma on a pod elsewhere is the thing that still sends the alert when the site, the rack or the upstream link is the problem. That is the whole argument for keeping it off-box.
A Status Page Your Users Can Read
Multiple status pages, each mappable to its own domain, with grouped monitors, custom branding and incident history. Point people at a URL during an incident instead of answering the same question fifteen times.
Nothing to Roll Out
No agents, no discovery rules, no service tuning. Add a URL, choose a check type, set an interval. Where Checkmk earns its complexity across hundreds of hosts, Uptime Kuma is running before you have finished reading its docs.
Flat $3/mo, However Many Endpoints
Unlimited monitors on one Launch pod: 1 vCPU, 512MB RAM, 10GB, with HTTPS and a domain already wired up. No per-service metering, no per-seat pricing, and the software itself is MIT.
Real Cost Comparison
A team running 20 servers and wanting both real infrastructure monitoring and a public status page for 40 endpoints.
- Checkmk Community: free and GPL-2.0, covers the 20 servers well
- Needs a monitoring server of its own, plus an agent per host
- Community support only; Pro from EUR 190/mo billed annually adds distributed monitoring and vendor support
- A branded, customer-facing status page is not what it produces
- Keep Checkmk Community for the 20 servers: free
- InstaPods Launch plan: $3/mo for Uptime Kuma
- Uptime Kuma: free and open source (MIT)
- 40 endpoints, unlimited monitors, status pages included
- Runs off the fleet, so it survives the fleet going down
Frequently Asked Questions
Is Uptime Kuma a replacement for Checkmk?
No. Checkmk monitors infrastructure from the inside with agents, auto-discovery, SNMP and 2000+ integrations across servers, network gear and cloud. Uptime Kuma probes endpoints from the outside and publishes a status page. If you swap Checkmk for Uptime Kuma you lose all visibility into the hosts themselves.
Is Checkmk free?
The Community edition is, and it is open source under GPL-2.0 with 2000+ pre-built integrations. Checkmk scopes it as easily scalable to about 100 hosts, with community support rather than vendor support. Pro starts at EUR 190 per month billed annually and Ultimate at EUR 275 per month.
How does Checkmk pricing actually work?
It is metered on services rather than on hosts, alongside custom metrics and synthetic tests. Checkmk reckons roughly 30 services to a host, so its Pro entry point of EUR 190 per month billed annually corresponds to about 100 hosts, which it describes as as low as about EUR 1.90 per host per month.
Can Checkmk publish a public status page?
Sort of. Checkmk lets you share a dashboard by public link, so an unauthenticated view is possible. What it shows is an operator console of hosts and services, not a branded page with plain-language incident updates. Uptime Kuma builds status pages as a first-class feature, several of them, each on its own domain.
Can I run Checkmk on an InstaPods pod?
It is not a 1-Click app, and it is not a good fit for a Launch pod. Checkmk runs as a monitoring site with its own web stack and background processes, which wants far more than 512MB of RAM. Uptime Kuma is the monitoring tool we deploy in one click for $3/mo.
Should I run both Checkmk and Uptime Kuma?
For most teams past a handful of servers, yes. Checkmk gives you depth on the machines you own: which disk is filling, which service is flapping. Uptime Kuma gives you the outside view your users actually experience, plus the status page. Community is free, so running both costs $3 a month.
Add the Outside View for $3/mo
Keep Checkmk for the fleet. Deploy Uptime Kuma on InstaPods for $3/mo, off that fleet, so something still tells you and your users when the whole thing goes quiet.
Deploy Uptime Kuma