Prometheus Node Exporter is installed on millions of Linux servers. If you run Prometheus, it is the obvious choice for host metrics. OxiPulse takes a fundamentally different approach — push instead of pull, OTLP instead of Prometheus exposition format. Here's a direct comparison.
Architecture: pull vs push
Node Exporter exposes a /metrics HTTP endpoint that Prometheus scrapes on a schedule. The flow is:
Node Exporter (port 9100) ← Prometheus (scrapes every 15 s) → storageOxiPulse pushes metrics to the collector:
OxiPulse → OTLP collector → storagePull is simpler to reason about for Prometheus users. Push works better in environments where agents are behind NAT, firewalls, or change IP frequently — Prometheus can't scrape what it can't reach.
Protocol and backend flexibility
Node Exporter outputs the Prometheus text exposition format. To use it with Grafana you need Prometheus (or a compatible system like Mimir or Thanos) in the middle.
OxiPulse outputs OTLP/gRPC, which is accepted by Grafana Cloud, Datadog, Honeycomb, OpenTelemetry Collector, and SecuryBlack's ingestor. No intermediate Prometheus is required.
Metrics collected
| Metric | Node Exporter | OxiPulse |
|---|---|---|
| CPU usage | ✓ (detailed per-mode) | ✓ (overall %) |
| Memory | ✓ (detailed: buffers, cache) | ✓ (used / total) |
| Disk I/O | ✓ | — |
| Disk space | ✓ | ✓ |
| Network | ✓ (per interface) | ✓ (aggregate in/out) |
| Filesystem stats | ✓ | — |
| Hardware (temp, fans) | ✓ (via collectors) | — |
| Systemd units | ✓ (via collector) | — |
Node Exporter wins on depth. OxiPulse covers the four metrics that matter for most server health checks without the complexity.
Offline resilience
Node Exporter has no buffer — if Prometheus can't scrape during an outage, data is lost. OxiPulse stores up to 24 hours of metric snapshots in memory and flushes them on reconnect.
Auto-update
Node Exporter is distributed as a binary you update manually or via a package manager. OxiPulse checks GitHub Releases 5 minutes after startup and replaces itself automatically.
When to choose Node Exporter
- You already run Prometheus and want the richest set of Linux metrics
- You need per-interface network stats, disk I/O, or hardware sensors
- Your team is deeply familiar with the Prometheus ecosystem
When to choose OxiPulse
- You use an OTLP-compatible backend (Grafana Cloud, Datadog, SecuryBlack)
- You need push-based delivery (NAT, dynamic IPs, cloud-init environments)
- You want offline resilience and auto-update out of the box
- You monitor a mix of Linux and Windows servers and want one agent for both