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Prometheus is an open-source metrics system with PromQL; you run its servers and pay no usage fee. Replacing it makes sense when local storage, operating the servers or scaling metrics no longer fits your team. The alternatives here range from self-hosted monitoring to hosted observability platforms. Their starting prices and capabilities differ, so compare expected ingest and user costs, then check API and query compatibility before moving dashboards and alerts.
01Why people leave Prometheus
Prometheus no longer fits at scale
A Reddit commenter reports moving to VictoriaMetrics for bare-metal performance; another advises comparing Prometheus with systems built for larger-scale metrics.
Server maintenance outweighs usage savings
Prometheus has no usage fee, but your team runs the servers. A hosted platform may shift that operational work into a bill.
You need broader observability
Teams consolidating telemetry or adding incident response may prefer a broader platform, while accepting usage costs and migration checks.
02The alternatives, ranked by fit
- Open observability platform
GrafanaGrafanaGrafana is a broad observability platform for teams consolidating telemetry and using OpenTelemetry or Prometheus. It has an open-source option and a free plan; the listed starting price is $19. Compare the plan with your current server costs, and validate how your PromQL dashboards, alerts and API clients map before moving workloads.
Trade-off: Telemetry use can grow bills; verify query and API compatibility before migrating.
7.6/10from
$19/mofree plan - Self-hosted monitoring
ZabbixZabbixZabbix is an open-source, self-hostable choice for teams avoiding per-device license fees. Its listed price is n/a, with a free plan. Choose it when controlling hosting and licensing matters more than adopting a hosted observability platform. Budget for hands-on setup and tuning, and confirm how your current metrics and alert workflows translate.
Trade-off: Self-hosting shifts setup and tuning work to your team.
7.8/10from
Freefree plan - Hosted observability
New RelicNew RelicNew Relic is a hosted observability platform for teams consolidating tools across application and infrastructure monitoring. It has a free plan and a listed starting price of $10. The free ingest allowance may suit an initial rollout, but model ingest and user costs at expected volume and verify API and dashboard migration needs.
Trade-off: Ingest and user costs can rise as usage scales.
7.2/10from
$10/mofree plan - Broad hosted platform
DatadogDatadogDatadog combines observability and security for teams operating Kubernetes and cloud infrastructure. Its listed starting price is $500, with usage costs and telemetry hygiene to manage. It may suit teams consolidating tools, but compare the bill against running Prometheus and check which APIs, metrics and alert workflows need changes.
Trade-off: Usage costs and telemetry volume need close management.
6.2/10from
$500/mo - Cloud-native observability
DynatraceDynatraceDynatrace is a broad observability and automation platform for Kubernetes and cloud-native operators, with tracing and user monitoring. Its listed starting price is $7. If you want to replace a metrics-only setup with wider coverage, verify integration details and estimate costs for the telemetry and features you plan to use.
Trade-off: Check costs and integrations before committing to production.
7.1/10from
$7/mo - Focused application APM
Scout APMScout APMScout APM is a focused APM service for teams using its supported application languages and developers debugging with coding agents. It has a free plan and a listed starting price of $19. Consider it for application performance work, not as a like-for-like infrastructure metrics replacement; check supported languages and plan limits first.
Trade-off: It focuses on application performance, not broad infrastructure monitoring.
7.0/10from
$19/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Prometheus Prometheus (current) | 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 |
| Datadog Datadog | 6.2 | $500/mo | No | Teams consolidating observability and security |
| 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 |
Questions people ask
What is the cheapest Prometheus alternative?
Prometheus has no usage fee, though you run the servers. Zabbix is open source and self-hostable, with a free plan and no listed starting price. Grafana and New Relic also have free plans. Compare hosting effort, ingest allowances and user costs before treating any option as cheaper.
Which Prometheus alternatives can we self-host?
Zabbix is listed as open source and self-hostable. Prometheus is also open source and self-hosted, but may no longer fit teams facing scale or maintenance constraints. Check hosting options and operational requirements with each vendor before planning a migration.
Can we switch without rewriting PromQL dashboards?
Do not assume dashboards, alerts or API clients will transfer unchanged. Compare the destination's query language and APIs with the PromQL and workflows your codebase uses. Test representative dashboards and alert rules, then estimate the work to update clients and export or retain historical data.