Best Open Source Alternatives to Zabbix

Compare the best free and open-source alternatives to Zabbix — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 5 alternatives

Zabbix

Proprietary SaaS

Zabbix alternatives compared

Open-source alternatives to Zabbix, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
NetData	81,259	GPL-3.0	Web	No	Nov 2026	Visit
Checkmate	11,019	AGPL-3.0	DockerLinux	Yes	Oct 2026	Visit
Checkmk	2,632	GPL-2.0	Web	No	Nov 2026	Visit
Icinga	2,245	GPL-3.0	Web	No	Nov 2026	Visit
Nagios	2,065	GPL-2.0	Web	No	Oct 2026	Visit

Top open-source Zabbix alternatives

NetData81,259GPL-3.0

Netdata is an open-source real-time infrastructure monitor that tracks per-second server and container metrics locally with zero query latency.

Web

vs Zabbix: a free, open-source option you fully control, licensed GPL-3.0.

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EasyP

Promoted

The modern standard for Protobuf workflows

Lint, codegen, breaking-change checks and dependency management in one Git-native CLI. Open source, no registry lock-in.

lintgeneratebreakingeasyp.lock

go · ts · java generated

$ easyp breaking

backward compatible

Checkmate11,019AGPL-3.0

Checkmate is a self-hosted uptime and server monitor that replaces BetterStack with native chat alerts, hardware telemetry, and customizable status pages.

DockerLinux

vs Zabbix: a free, open-source option you fully control, licensed AGPL-3.0.

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Checkmk2,632GPL-2.0

Checkmk is an open-source infrastructure monitoring system replacing Datadog and PRTG with rule-based auto-discovery and on-premise data control.

Web

vs Zabbix: a free, open-source option you fully control, licensed GPL-2.0.

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Icinga2,245GPL-3.0

Icinga is an open-source monitoring platform that replaces Datadog and PRTG for infrastructure health checks using a compiled C++ engine and custom DSL.

Web

vs Zabbix: a free, open-source option you fully control, licensed GPL-3.0.

Visit Details

Nagios2,065GPL-2.0

Nagios Core is an open-source infrastructure monitoring engine that replaces costly per-host tools with scriptable, self-hosted health and uptime checks.

Web

vs Zabbix: a free, open-source option you fully control, licensed GPL-2.0.

Visit Details