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Graylog is a self-managed log platform with deployments for teams that run their own infrastructure. Its paid SIEM starts at $18,000 a year; it also lists a free plan. The alternatives below suit different replacement goals: Grafana for broader telemetry, Prometheus for open-source metrics, or hosted platforms for consolidated observability. Check API coverage, supported SDK languages, data export and pricing at your expected volume before moving logs or rebuilding alerts.
01Why people leave Graylog
Costs are hard to justify
One Reddit thread weighs a switch from Graylog and Datadog largely on business value and cost, while noting hosted observability bills can rise quickly.
Telemetry is split across tools
Teams using separate metrics and log platforms may prefer one observability stack, but consolidation can mean migration work and new usage costs.
Self-hosting takes operational work
Reddit commenters point to infrastructure costs and missing conveniences in self-hosted log stacks; lightweight setups can trade away data manipulation features.
02The alternatives, ranked by fit
- Best for open telemetry
GrafanaGrafanaGrafana is an open-source observability platform for teams consolidating telemetry or using OpenTelemetry and Prometheus. It lists a free plan and pricing from $19, while bills can grow with telemetry use. That gives you a path beyond Graylog's log focus, but plan the migration of dashboards and alerting, then verify API and SDK coverage for your integrations.
Trade-off: Telemetry-based costs can grow; confirm expected spend before moving data.
7.6/10from
$19/mofree plan - Best for metrics
PrometheusPrometheusPrometheus is open source, self-hostable and listed at $0, with PromQL for querying metrics. It fits teams that want local metric storage without usage fees. It is a metrics system, not a drop-in log manager, so a Graylog replacement still needs a log-storage and search plan. You also operate the servers and handle migration work.
Trade-off: Metrics-focused; you run the servers and still need a log solution.
7.8/10from
Freefree plan - Best for self-hosted monitoring
ZabbixZabbixZabbix is a free, open-source, self-hosted monitoring option for teams avoiding per-device license fees. Choose it if your Graylog replacement project is really about infrastructure monitoring rather than log search. It will not automatically replace log workflows: map the checks and alerts you need, and budget engineering time for setup and tuning.
Trade-off: Setup and tuning require hands-on work; it is not a direct log replacement.
7.8/10from
Freefree plan - Best for hosted observability
New RelicNew RelicNew Relic is a hosted observability platform with a free plan and pricing from $10. It may suit teams replacing separate tools with one platform, especially if they want to reduce infrastructure operations. The listed price is not a usage estimate: check ingest and user costs against your workload, and verify the APIs, SDKs and export paths needed before migrating.
Trade-off: Ingest and user costs can rise as usage grows.
7.2/10from
$10/mofree plan - Best for consolidated observability
DatadogDatadogDatadog combines observability and security for teams that want logs alongside other telemetry. It lists pricing from $500, but usage costs and telemetry hygiene need close attention. Reddit users report that logs, APM and RUM can take a large budget share. Compare expected spend at your volume with Graylog, and check export and integration requirements before consolidating.
Trade-off: Usage costs can grow quickly, and consolidation may increase lock-in.
6.2/10from
$500/mo - Best for cloud operators
DynatraceDynatraceDynatrace is a hosted observability and automation platform aimed at teams consolidating tools or operating Kubernetes and cloud-native systems. Pricing starts at $7, but that is not a workload estimate; verify the billing basis and expected production cost. Before replacing Graylog, confirm the API and SDK support, log workflows and data-export options your applications depend on.
Trade-off: Pricing and integration details need checking against your workload.
7.1/10from
$7/mo
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Graylog Graylog (current) | 7.4 | $1,250/mo | Yes | Teams operating their own log platform |
| Grafana Grafana | 7.6 | $19/mo | Yes | Teams consolidating telemetry signals |
| Prometheus Prometheus | 7.8 | Free | Yes | Teams monitoring systems and services |
| 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 |
Questions people ask
Is there a free Graylog?
Graylog lists a free plan and supports self-hosted deployments. Check the current plan terms for the features, capacity and support included before using it in production; the paid SIEM starts at $18,000 a year.
What is the best open-source log manager?
Of these alternatives, Grafana is listed as open source and is a broad observability platform. Prometheus is also open source, but it is for metrics, not a direct log-manager replacement. Choose based on whether you need log search, metrics, or a wider telemetry stack, then verify storage and export needs.
How is Graylog different from Splunk?
Graylog is a flexible, self-managed log platform, and its paid SIEM starts at $18,000 a year. A useful comparison with Splunk depends on your ingestion volume, retention, search and SIEM requirements. Compare those workloads, licensing terms, deployment options and data-export paths before choosing.