Prtg costs $19/mo.
These cost $0.
1 free alternatives to Prtg, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Prtg vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs $19/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Checkmk | open source | cm0zg8j6i000au5torrmovier | Self-host | ★ 2.6k | Prtg vs Checkmk → |
The picks
1 open source · ranked by fit
- 01
Checkmk
open sourcecm0zg8j6i000au5torrmovierSelf-host2.6koct 2026Scalable and automated IT monitoring.
The catch vs PrtgRequires self-hosting setup, updates, and server maintenance compared to managed Prtg.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/tribe29/checkmk or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-04
Frequently Asked Questions
Direct answers · Prtg open-source replacements
What is the best free alternative to Prtg?+
The top free alternative to Prtg is Checkmk (open source, cm0zg8j6i000au5torrmovier). Scalable and automated IT monitoring.
Can I self-host a free replacement for Prtg?+
Yes. Of the 1 free alternatives to Prtg, 1 can be self-hosted on your own server or local machine: Checkmk (cm0zg8j6i000au5torrmovier).
How much does switching from Prtg to a free alternative save?+
Prtg starts at $19/month per seat ($228/year). Switching a 5-person team to a free alternative like Checkmk saves $1,140 per year in software subscription fees.
Should I vibe-code or build my own Prtg clone from scratch?+
Our build verdict for Prtg is KINDA (the core, yes. the polish, no). Instead of paying recurring SaaS fees for Prtg or rebuilding it from scratch, deploy one of the 1 battle-tested open-source alternatives like Checkmk.
What is the catch when switching from Prtg to Checkmk?+
Requires self-hosting setup, updates, and server maintenance compared to managed Prtg.
