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).
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.
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.
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).
Uptime Kuma homepage · Source on GitHub · Datadog vs Uptime Kuma →
Not what you're looking for?
Browse other tools in Monitoring & Observability, or check out open source projects by category on the full category index.
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