The best Observability & Monitoring
Every option ranked — open-source, self-hostable, and commercial — by our transparent Sovereignty Score, with honest trade-offs so you choose what fits you, not us.
Self-hosted metrics, logs, and traces without per-host SaaS pricing.
L3Infrastructure — layer 3 of the AI stack- 1
Grafana + Prometheus
Top pickOpen sourceThe open-source observability standard.
Free / self-host · in our Datadog comparison →
What is Grafana + Prometheus? →90sovereignty - 2
SigNoz
Top pickOpen sourceAn OpenTelemetry-native, single-app APM and observability platform.
Free / self-host; optional managed cloud · in our New Relic comparison →
What is SigNoz? →88sovereignty - 3
Zabbix
Open sourceMature, enterprise-grade open-source monitoring you fully own.
Free / self-host (optional paid support and cloud from Zabbix) · in our Datadog comparison →
What is Zabbix? →86sovereignty - 4
Netdata
Open sourceReal-time, per-second monitoring with zero-config auto-discovery.
Free / self-host; optional paid cloud · in our Datadog comparison →
What is Netdata? →85sovereignty
Is it free?
The free tier, its real limits and where you start paying — read from each vendor's own pricing page and dated.
Run these yourself
What each one actually needs — real RAM, honest running cost, and the setup time nobody quotes.
- Self-hosting Grafana + Prometheus 8 GB
- Self-hosting SigNoz 8 GB
- Self-hosting Zabbix 4 GB for a few hundred hosts, and the database wants more
- Self-hosting Netdata 1 GB per monitored node
Replacing a specific tool?
Head-to-head comparisons for each popular observability & monitoring product.
Straight head-to-heads
Two observability & monitoring tools, side by side — verified facts and a plain verdict.