Grafana + Prometheus vs Zabbix
Both are free/open-source alternatives to Datadog. Here's how they stack up — verified facts, no spin.
Grafana + Prometheus
TOP PICKThe open-source observability standard.
Prometheus scrapes and stores metrics; Grafana visualizes them (and logs and traces via Loki and Tempo). Together they are the de-facto open-source monitoring stack, fully self-hostable.
Zabbix
Mature, enterprise-grade open-source monitoring you fully own.
Zabbix has been an open-source monitoring workhorse since 2001, covering infrastructure, network, server, application, and cloud monitoring with alerting, dashboards, and auto-discovery built in. It is a single self-hosted platform rather than an assembled stack, which makes it a strong Datadog alternative for teams that want broad coverage and mature alerting without per-host SaaS billing.
Side by side
| Grafana + Prometheus | Zabbix | |
|---|---|---|
| Sovereignty Score | 90 | 86 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | AGPL-3.0 (Grafana) / Apache-2.0 (Prometheus) | AGPL-3.0 |
| Pricing | Free / self-host | Free / self-host (optional paid support and cloud from Zabbix) |
Grafana + Prometheus is Macrostack's recommended Datadog alternative, so it's our pick here.
Grafana + Prometheus
Strengths
- +Industry-standard, huge ecosystem
- +Metrics, logs, and traces via the same UI
- +Enormous community and dashboards
Trade-offs
- −You assemble and operate the stack
- −Steeper initial setup than a SaaS agent
Zabbix
Strengths
- +Extremely mature and battle-tested (since 2001)
- +Broad coverage — infra, network, servers, apps, cloud in one platform
- +Powerful alerting and auto-discovery out of the box
- +No per-host or per-metric billing when self-hosted
Trade-offs
- −Interface and setup feel more traditional than newer tools
- −Not OpenTelemetry-native — less focused on distributed tracing/APM
- −Initial configuration has a learning curve
Facts verified 2026-07-12. Licenses and pricing change — spotted something out of date? That's a correction we want.