SigNoz for log analysis
SigNoz is our third pick for log analysis, and the reason is narrow but real: it is OpenTelemetry-native, so the same backend that holds your logs also holds the traces and metrics those logs belong to. If your stack already emits OTel, an agent can pull a metric anomaly and the dashboard around it in one place instead of correlating across two products.
It ranks behind Datadog and Grafana here because its current tool surface leans toward metrics, alerts, and dashboards rather than free-form log search. For teams standardized on OTel it earns the spot; for raw log spelunking, a sibling fits better.
How SigNoz fits
The tools that do the work for this task are signoz_query_metrics and signoz_list_metrics, which let an agent find a metric key and pull its time series, plus signoz_list_dashboards and signoz_get_dashboard to read the panels a team already built around a service. The alert tools (signoz_list_alerts, signoz_get_alert, signoz_get_alert_history) tell the agent what fired and when, which is often the thread you follow back into the logs. signoz_create_alert and signoz_update_alert let it codify a new rule once a pattern is understood.
The honest limit: the exposed tools center on metrics, dashboards, and alert rules, not a dedicated log-query primitive, so an agent reasons about log-driven incidents through the metrics and alerts side rather than running arbitrary text searches over log lines. Datadog and Grafana, our first two picks, expose richer query paths for digging through logs directly, and Better Stack is the developer-friendly log service when search ergonomics matter most. Reach for SigNoz when the value is keeping logs, traces, and metrics in one OTel backend and you want the agent to move between them without leaving the platform.
Tools you would use
| Tool | What it does |
|---|---|
| signoz_list_metrics | Lists available metric keys in the SigNoz instance. |
| signoz_query_metrics | Queries metric time series and values. |
| signoz_list_alerts | Lists alerts in SigNoz. |
| signoz_list_alert_rules | Lists configured alert rules. |
| signoz_get_alert | Gets the details of a specific alert. |
| signoz_get_alert_history | Gets the firing history for an alert. |
| signoz_create_alert | Creates a new alert rule. |
| signoz_update_alert | Updates an existing alert rule. |
| signoz_delete_alert | Deletes an alert rule. |
| signoz_list_dashboards | Lists all dashboards. |
FAQ
- Does SigNoz let an agent run free-text log queries?
- Its current MCP tools focus on metrics (signoz_query_metrics, signoz_list_metrics), dashboards, and alerts rather than a dedicated log-search primitive. The agent reasons about log-driven incidents through those signals. If raw log search is the core need, Datadog or Grafana fit better.
- When does SigNoz beat Datadog or Grafana for this?
- When your telemetry is OpenTelemetry-native and you want logs, traces, and metrics in one backend. SigNoz is built around OTel, so an agent can follow an alert into the dashboards and metrics that surround it without crossing product boundaries.