Grafana + Prometheus vs Zabbix
Both are alternatives to Datadog. Here's how they stack up — verified facts, no spin.
Also searched as Zabbix vs Grafana + Prometheus — same comparison, one verdict.
Grafana + Prometheus and Zabbix are closely matched on ownership (90 vs 86) — this one comes down to pricing and to which trade-offs below you can live with.
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
10 points of comparison, every one read from a verified field. Green marks the side that wins a row outright. A dash means we do not hold that fact — never that it is zero.
| Grafana + Prometheus | Zabbix | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 90 | 86 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first data | 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) |
| RAM to run it wellThe figure that actually matters, not the vendor's minimum. | 8 GB | 4 GB for a few hundred hosts, and the database wants more |
| Realistic running costWhat the box costs each month if you run it yourself. | $30–60/mo for a stack monitoring 20–50 hosts, against several hundred on Datadog for the same estate | $25–50/mo depending on retention |
| Setup timeHonest first-install estimate, not the marketing quickstart. | A day for the stack, a week before the dashboards are genuinely useful | 3–4 hours |
| Ongoing maintenanceThe part nobody budgets for. | Real. You own retention policy, cardinality, alert-rule hygiene and upgrades. This is the piece people underestimate: expect a few hours a month once it matters. | Active. Housekeeping and partitioning are ongoing jobs. |
Grafana + Prometheus is Macrostack's recommended Datadog alternative, so it's our pick here.
Weighing both against staying on Datadog? Is Datadog free? What it actually costs →
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
Which one fits you
The trade-offs above, turned into a decision. Find the line that describes your team.
Choose Grafana + Prometheus
if a lower exit cost matters more to you than any single feature, and industry-standard, huge ecosystem.
Choose Zabbix
if extremely mature and battle-tested (since 2001).
Neither, yet
if both carry a real cost you should weigh first — you assemble and operate the stack, and interface and setup feel more traditional than newer tools. If either of those is a dealbreaker for your team, the shortlist is wrong rather than the choice.
What it takes to run these yourself
Real requirements and honest running costs, not the vendor quickstart.
Self-hosting Grafana + Prometheus
8 GB RAM · A day for the stack, a week before the dashboards are genuinely useful
$30–60/mo for a stack monitoring 20–50 hosts, against several hundred on Datadog for the same estate
Self-hosting Zabbix
4 GB for a few hundred hosts, and the database wants more RAM · 3–4 hours
$25–50/mo depending on retention
Grafana + Prometheus vs Zabbix — common questions
Is Grafana + Prometheus a better fit than Zabbix for observability & monitoring?
It depends on what you are optimising for, and the honest split is this: Grafana + Prometheus scores 90 to Zabbix's 86 on data ownership and exit cost, so it is the safer choice if you care about being able to leave. Zabbix earns its place on a different axis — extremely mature and battle-tested (since 2001). Neither is a wrong answer for every team; the table above is the actual comparison.
What happens if we want to switch later?
Grafana + Prometheus keeps its data local or in open formats, so leaving is an export rather than a negotiation. Zabbix is still self-hostable, so the files stay on your server either way — but it is not local-first by design, so check what its export produces before you rely on it.
Can I self-host Grafana + Prometheus or Zabbix?
Both can be self-hosted. The difference is what it costs you in time rather than whether it is possible — see the setup and maintenance rows above.
Are Grafana + Prometheus and Zabbix both alternatives to Datadog?
Yes — both appear in our Datadog comparison, which is why they are worth putting side by side. People usually arrive here already having decided to move off Datadog and now choosing between the two replacements, which is a narrower and much easier question.
Related alternative guides
Facts verified 2026-07-12. Licenses and pricing change — spotted something out of date? That's a correction we want.