What is it
| Parameter | Netdata | Prometheus |
|---|---|---|
| Architecture | Agent-based | Server-based (Pull) |
| Resolution | 1 second | 10-60 seconds |
| Storage | Distributed (Edge) | Centralized (TSDB) |
| Query Language | N/A (Visual) | PromQL |
| Complexity | Low (Zero-config) | Medium/High |
Netdata is a real-time monitoring tool focused on instant node performance diagnostics. Prometheus is a metric collection and alerting system designed for long-term storage and infrastructure-wide analysis via a central server.
Performance
Netdata is optimized for minimal resource consumption at a high collection frequency. The agent uses approximately 1% CPU and 100-300 MB RAM to collect thousands of metrics every second. Prometheus requires significant RAM to manage the Head Block, especially with high label cardinality. The load in Prometheus scales proportionally with the number of targets and time series.
Configuration & complexity
Netdata operates on a zero-config principle: after installation via curl | sh, it automatically detects running services (Nginx, Docker, MySQL) and builds dashboards. Prometheus requires manual prometheus.yml configuration, installation of separate exporters (e.g., node_exporter), and definition of scrape jobs.
When to choose what
- Netdata: when you need to understand what is happening with a specific server right now. Ideal for troubleshooting and monitoring bare-metal servers or individual VMs.
- Prometheus: when cluster monitoring (Kubernetes), infrastructure-wide data aggregation, complex alerting, and long-term history are required.
Cost / licensing
Both solutions are Open Source. Prometheus is distributed under the Apache 2.0 license. Netdata uses GPL v3+. Netdata offers a cloud version (Netdata Cloud) with paid tiers for extended storage and team features, while Prometheus remains completely free but requires infrastructure maintenance costs.
Ecosystem & integrations
The Prometheus ecosystem is broader due to Grafana, which is the visualization standard. There are hundreds of official and community exporters. Netdata has over 800 built-in data collection plugins and its own powerful UI, but is less frequently used as the primary data source for external visualization systems.
Verdict
Use Netdata for detailed, on-the-spot performance analysis with per-second precision. Use Prometheus as the foundation for a centralized observability system where long-term trends and data correlation across multiple services are critical.