SigNoz

Most teams end up with a metrics system, a log store and a tracing tool that know nothing about each other, so debugging means carrying a timestamp between three browser tabs. SigNoz puts logs, metrics, traces, alerts, dashboards and exceptions in one product, so context travels with you instead of being reconstructed by hand.

It is built on OpenTelemetry, which means you instrument once with an open standard and keep ownership of the telemetry. Storage is a single columnar database chosen for high-cardinality, high-volume workloads, and queries can be written through a visual builder, PromQL or ClickHouse SQL.

The monitoring surfaces it ships with cover most of what a production team watches.

• APM: service latency, error rate, throughput, Apdex, top endpoints, database calls and external calls.
• Log management: ingest, search, aggregate and correlate logs against traces and metrics.
• Infrastructure monitoring: Kubernetes clusters, pods, nodes and workloads alongside host CPU, memory, disk and network.
• Distributed tracing: flamegraphs, waterfalls, span events and trace analytics, plus funnels that expose drop-offs in a request flow.
• LLM observability: traces for LLM apps and RAG pipelines covering prompts, tool calls, tokens, latency and cost.

The community edition is free and runs on your own infrastructure through Docker, Kubernetes or Linux, with managed cloud and enterprise tiers for teams that need compliance, RBAC, custom retention and support. An MCP server carries telemetry into coding agents for teams working that way.