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Best Self-Hosted Observability Tools

Self-hosted observability tools replace Datadog or Splunk with metrics, logs, and traces you run yourself. The picks below compare what each one covers — metrics, logs, traces, or all three — plus resource weight and whether it's an all-in-one app or a stack you assemble.

Observability

Grafana

The standard open-source dashboarding and visualization layer for metrics, logs, and traces, querying Prometheus, Loki, and dozens of other data sources.
GoTypeScript
easyRead guide →
Observability

Graylog

Centralized log management on MongoDB and OpenSearch, with search, dashboards, and alerting for large-volume log ingestion.
JavaMongoDBOpenSearch
hardRead guide →
Observability

Netdata

Real-time, per-second monitoring of systems, containers, and applications with zero-configuration auto-detection and a lightweight C agent.
C
easyRead guide →
Observability

OpenObserve

A single Rust binary that ingests, indexes, and queries logs, metrics, traces, and frontend RUM events, with Parquet-based columnar storage for low storage cost.
Rust
easyRead guide →
Observability

Prometheus

The de facto open-source metrics time-series database and alerting engine, scraping targets over HTTP and powering most self-hosted dashboarding stacks.
Go
easyRead guide →
Observability

SigNoz

OpenTelemetry-native APM, logs, metrics, and traces in a single application, backed by ClickHouse for unified storage and querying.
GoTypeScriptClickHouse
hardRead guide →

Head-to-heads in this category

ObservabilityAug 2026
Grafana
vs
Netdata

The full observability platform vs. the zero-config real-time agent.

Read the verdict →
ObservabilityAug 2026
Prometheus
vs
Grafana

Not really rivals — the metrics database vs. the dashboard layer.

Read the verdict →
ObservabilityAug 2026
SigNoz
vs
Datadog

Same job, opposite ownership: run the ClickHouse stack yourself, or pay per host forever.

Read the verdict →
ObservabilityAug 2026
SigNoz
vs
Grafana

One integrated OTel app vs. the dashboard layer you build a stack around.

Read the verdict →
ObservabilityJul 2026
SigNoz
vs
OpenObserve

OTel-native APM platform vs. a featherweight single binary.

Read the verdict →

Replace a paid tool

Self-hosted Datadog alternatives →Self-hosted Splunk alternatives →

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