Side by side
Heimdall vs siomon
Both stand on hardware monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+2
Heimdall provides free fleet monitoring with terminal dashboards, metric backends, alerts, and scriptable diagnostics. Operators should configure persistent storage and the recommended enrollment and TLS protections for networked deployments.
Visit Heimdall Free plan Linux
siomon combines live sensor monitoring with broad one-shot hardware reporting and multiple export formats. Its dependency-free core is straightforward, while deeper hardware data depends on root access, drivers, or optional modules.
Visit siomonThe facts
| Heimdall | siomon | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Windows | Linux |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | github.com | github.com |
| On hardware monitoring software | #25 of 59 | #54 of 59 |
Heimdall: what it does well
- Monitors broad hardware metrics
- Supports multi-machine fleet dashboards
- Prometheus/OpenMetrics and backend compatibility
- Webhook threshold alerts
- Read-only audited diagnostics
What to know first
- History is lost after hub restart without TSDB
- Default hub is plaintext and unauthenticated
- Secure deployment requires extra configuration
siomon: what it does well
- Tracks minimum, maximum, and average readings
- Configurable alerts and CSV logging
- Reports export to four formats
- Broad CPU and hardware coverage
- No mandatory runtime dependencies
What to know first
- Linux only
- NVIDIA details require the NVIDIA driver
- Some readings need optional components
- Extra data requires root access
Alternatives to Heimdall Alternatives to siomon The whole list