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Datadog bundles observability and security; its listed starting price is $500. Developers looking to replace it can choose a broad hosted platform, self-hosted metrics or infrastructure monitoring, or a tool focused on application performance or incident response. The tradeoffs differ: free and open-source options shift more operating work to your team, while hosted plans can still incur telemetry or user costs. Match the replacement to the signals and workflows you actually need, then verify production limits before migrating.
01Why people leave Datadog
Telemetry costs take ongoing work
One Reddit thread describes unused custom metrics and indexed health-check logs adding cost; a commenter says filtering logs before ingestion cut noise and cost.
Cleanup can be manual
A Reddit user reports cutting about 30% after manually reviewing metrics, logs, dashboards and monitors. Another recommends automation and configuration reviews.
An agent can create risk
One Reddit user reports a Datadog agent causing an infinite loop in their application. Treat this as an individual report, and test agents in your own environment.
02The alternatives, ranked by fit
- Self-hosted metrics
PrometheusPrometheusPrometheus is an open-source, self-hostable metrics system with PromQL and a listed price of $0. It fits teams that want to avoid usage fees and control local metric storage. The tradeoff is operating the servers yourself; plan the migration around which metrics and queries you need to preserve rather than expecting a hosted Datadog replacement.
Trade-off: You take on server operations and it focuses on metrics, not a broad observability platform.
7.8/10from
Freefree plan - Open telemetry platform
GrafanaGrafanaGrafana suits teams consolidating telemetry around OpenTelemetry or Prometheus and needing dashboards. It has a free plan and a listed starting price of $19, but bills can grow with telemetry use. For a Datadog migration, check how your existing signals and dashboards fit your chosen Grafana setup, and model expected telemetry costs before moving production workloads.
Trade-off: Telemetry use can still drive bills; verify which features fit your deployment.
7.6/10from
$19/mofree plan - Self-hosted infrastructure
ZabbixZabbixZabbix is an open-source, self-hostable infrastructure monitoring option with a free plan and no per-device license fees. It can suit teams that want to avoid usage-based monitoring charges and run monitoring themselves. Compared with Datadog's broader platform, expect more setup and tuning; identify which infrastructure checks and operational workflows need a separate replacement.
Trade-off: Self-hosting and tuning add operational work, and it is infrastructure-focused.
7.8/10from
Freefree plan - Hosted observability
New RelicNew RelicNew Relic is a hosted observability platform for teams consolidating tools across applications and infrastructure. Its listed starting price is $10 with a free plan, but ingest and user costs need review as usage grows. Compare your expected telemetry volume and user count with the plan terms, then check that the capabilities you rely on in Datadog are covered.
Trade-off: Ingest and user costs can rise; check allowances against production usage.
7.2/10from
$10/mofree plan - Broad observability
DynatraceDynatraceDynatrace is a broad observability and automation platform for teams working with Kubernetes, cloud-native systems, tracing or user monitoring. Its listed starting price is $7. Before choosing it over Datadog, verify costs at your expected scale and confirm integration details against your stack; the starting price alone does not establish what a production deployment will cost.
Trade-off: Costs and integration details need verification before production.
7.1/10from
$7/mo - Focused application performance
Scout APMScout APMScout APM is a focused APM service, listed from $19 with a free plan. It may fit small teams debugging applications in supported languages, including developers who want agent access for coding agents. Check the supported languages and plan limits against your services before rollout; it is a narrower option than a broad observability and security platform.
Trade-off: Focused APM, not a like-for-like replacement for broad observability.
7.0/10from
$19/mofree plan - Incident lifecycle workflows
FireHydrantFireHydrantFireHydrant targets incident lifecycle management, including Slack- or Teams-based operations and workflow automation. It lists 350+ API endpoints, a free plan and a starting price of $25. Consider it if incident workflows are the part of Datadog you want to replace; verify production limits and whether you still need a separate tool for observability signals.
Trade-off: Incident response focus; verify production limits and plan for observability separately.
6.8/10from
$25/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Datadog Datadog (current) | 6.2 | $500/mo | No | Teams consolidating observability and security |
| Prometheus Prometheus | 7.8 | Free | Yes | Teams monitoring systems and services |
| Grafana Grafana | 7.6 | $19/mo | Yes | Teams consolidating telemetry signals |
| Zabbix Zabbix | 7.8 | Free | Yes | Teams with self-hosting capacity |
| New Relic New Relic | 7.2 | $10/mo | Yes | Teams consolidating observability tools |
| Dynatrace Dynatrace | 7.1 | $7/mo | No | Teams consolidating observability tools |
| Scout APM Scout APM | 7.0 | $19/mo | Yes | Teams using supported application languages |
| FireHydrant FireHydrant | 6.8 | $25/mo | Yes | Teams standardizing incident response |
Questions people ask
What is the cheapest Datadog alternative?
Prometheus is listed at $0 and is open source, but you run the servers, so infrastructure and operational work still have costs. Zabbix also has a free plan, is self-hostable and avoids per-device license fees. For hosted options, compare the free-plan allowances and expected telemetry or user costs with your actual usage.
Can open-source tools replace Datadog?
They can replace parts of its role. Prometheus provides open-source metrics and PromQL, while Zabbix offers self-hosted infrastructure monitoring. Grafana is open source and supports teams using OpenTelemetry or Prometheus. These tools do not all cover the same scope, so map the signals and workflows you depend on before switching.
How should developers reduce migration risk?
Inventory the metrics, logs, dashboards, alerts and workflows you still use, then compare each against the proposed replacement. Run the new setup alongside Datadog while checking query coverage, operating effort and costs at expected production usage. For hosted plans, confirm limits with the vendor; for self-hosted tools, plan server operations and ownership.