GitPop
4 candidates

Open source alternatives to Datadog

Cloud monitoring as a service: metrics, logs, traces, and APM. · Datadog, Inc.

Pricing: Free trial; paid from $15/host/mo

Datadog is the default 'all-in-one observability' platform but the bill scales fast. Open-source alternatives split into two camps: APM-only (SigNoz, GlitchTip) and full observability stacks (Grafana + Prometheus + Loki + Tempo). SigNoz is the most direct Datadog APM replacement in 2026; the Grafana stack is the right pick when you want to compose your own observability backbone.

The 4 candidates, ranked by PopScore

  1. #01SignozHQ/signoz

    Open-source APM with metrics, traces, and logs in one binary. The most direct Datadog APM replacement in 2026.

    GitHub
  2. #02grafana/grafana

    Open observability platform. The right pick for teams that want to compose their own metrics + logs + traces stack with open standards.

    GitHub
  3. #03Sentry/sentry

    Error tracking and performance monitoring. The right pick for application-level error visibility with strong React/Next.js support.

    GitHub
  4. #04prometheus/prometheus

    De-facto standard for metrics collection. The right pick as the backbone of a self-hosted observability stack.

    GitHub

Related alternatives

Looking for a side-by-side comparison of two open-source projects? The compare matrix has 60+ "X vs Y" pages. Looking for a curated "best of" list for a specific category? See Best AI tools 2026 (and the 7 other category editions).

Best open source alternatives to Datadog (2026) · GitPop