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3 open source alternatives to Datadog

Infrastructure and application monitoring. Here are the open source projects real teams use instead — ranked by fit, with honest pros and cons for each.

What people don't love about Datadog

  • Notoriously expensive once volume grows.
  • Bills can spike unexpectedly.
  • Vendor lock-in with proprietary agents.

Current Datadog pricing (for reference): From $15/host/month (Infrastructure).

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Quick comparison

Alternative Best for License Self-host Hosted cloud?
SigNoz
Open source Datadog alternative — metrics, traces and logs in one. 		Unified metrics, traces and logs with an OpenTelemetry-native stack. Apache-2.0 (community) / commercial (cloud) ★★★☆☆ Yes
Prometheus + Grafana
Open source metrics collection and dashboards. 		The industry-standard metrics stack for infrastructure. Apache-2.0 / AGPL-3.0 (Grafana) ★★★☆☆ Yes
Uptime Kuma
Self-hosted uptime monitor — Pingdom alternative. 		Simple uptime and availability checks without a full APM. MIT ★☆☆☆☆ Self-host only

1. SigNoz — Unified metrics, traces and logs with an OpenTelemetry-native stack.

Open source Datadog alternative — metrics, traces and logs in one.

Strengths

  • Unified metrics + traces + logs UI.
  • OpenTelemetry native.
  • Modern UI closer to Datadog.

Weaknesses

  • Heavy resource requirements for full stack.
  • Cloud tier pricing is newer.
  • Smaller plugin ecosystem than Prometheus.
License: Apache-2.0 (community) / commercial (cloud) Self-host difficulty: 3/5 Hosted cloud option

SigNoz homepage · Source on GitHub · Datadog vs SigNoz →

2. Prometheus + Grafana — The industry-standard metrics stack for infrastructure.

Open source metrics collection and dashboards.

Strengths

  • De-facto standard metrics stack.
  • Massive exporter ecosystem.
  • Grafana dashboards are industry standard.

Weaknesses

  • No built-in long-term storage by default.
  • Alert routing requires Alertmanager learning.
  • Not a turn-key APM — more assembly required.
License: Apache-2.0 / AGPL-3.0 (Grafana) Self-host difficulty: 3/5 Hosted cloud option

Prometheus + Grafana homepage · Source on GitHub · Datadog vs Prometheus + Grafana →

3. Uptime Kuma — Simple uptime and availability checks without a full APM.

Self-hosted uptime monitor — Pingdom alternative.

Strengths

  • Single container, minimal resources.
  • Clean UI with status pages.
  • Many notification integrations.

Weaknesses

  • Not a full APM — simple uptime checks.
  • Multi-node setup is harder.
  • Data resides where you host it (single point).
License: MIT Self-host difficulty: 1/5

Uptime Kuma homepage · Source on GitHub · Datadog vs Uptime Kuma →

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