Overview
SigNoz is an open-source observability platform built on OpenTelemetry that unifies application performance monitoring, distributed tracing, metrics, and logs in a single tool. It offers out-of-the-box APM charts, service maps, and exceptions tracking backed by ClickHouse. It is one of the most direct full-stack open-source alternatives to Datadog.
Key features
- Unified metrics, traces, and logs in a single application
- Built natively on OpenTelemetry instrumentation
- Out-of-the-box APM charts and service maps
- Exceptions and error tracking
- ClickHouse-backed storage for query performance
- Multiple deployment paths including Docker Compose and Kubernetes
Our take
SigNoz is one of the more credible open-source answers to Datadog, bundling APM, tracing, metrics, and logs into one tool rather than stitching together Prometheus, Jaeger, and a log stack. The OpenTelemetry-native approach means you instrument once against an open standard instead of a proprietary agent, and ClickHouse gives it the horsepower to query high-cardinality data quickly. The caveat is operational weight: ClickHouse is the backbone here, and running and sizing it for real traffic is a meaningful commitment, so this is not a deploy-and-forget setup. A managed cloud offering exists if you'd rather skip the storage operations, but the self-hosted path is where the cost savings versus Datadog actually land.
Ideal for: Engineering teams already invested in OpenTelemetry who want a self-hosted, single-pane alternative to Datadog for the three observability signals.
Where it falls short of Datadog
- Runs a heavier stack (ClickHouse + OTel collector + multiple services), needing more resources than lightweight monitors
- Some advanced features and SSO are reserved for the cloud/enterprise tier
- No public status page or simple uptime checks like UptimeRobot
- Younger ecosystem than Datadog; fewer turnkey integrations
We list the gaps honestly so you can decide if the trade-off is worth owning your data.
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