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10 top picks · 3 audience rankings

Best open source monitoring tools

The best open source monitoring tool is Uptime Kuma, with 92,149 GitHub stars, the MIT license and a Docker image; Netdata and Grafana are strong alternatives. This page also breaks the picks down by team size and use: Uptime Kuma leads for startups, small business, enterprise and solo developers. The overall ranking weighs GitHub stars, commits in the last year, Docker images, open-source licenses and recent commits across the 20 apps in the monitoring & status pages category of the appsgit catalog.

Updated · data from GitHub, refreshed nightly

Top picks

  1. Rank 1:

    Uptime Kuma

    louislam/uptime-kuma

    Easy-to-use self-hosted uptime monitor with status pages and 90+ notification channels.

    Monitoring & Status PagesJavaScriptDocker

    Uptime Kuma has 92,149 GitHub stars, uses the MIT license, ships a Docker image and had 1,359 commits in the last year; it replaces Datadog and Uptime Robot.

  2. Rank 2:

    Netdata

    netdata/netdata

    Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

    Monitoring & Status PagesGoDocker

    Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,609 commits in the last year; it replaces Datadog and Pingdom.

  3. Rank 3:

    Grafana

    grafana/grafana

    Dashboards and visualization for metrics, logs and traces from Prometheus, Loki and dozens of other sources.

    Monitoring & Status PagesTypeScriptDocker

    Grafana has 77,096 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 11,362 commits in the last year; it replaces Datadog and Grafana Cloud.

1 of 4 · 10 picks

Top picks

10 of the 20 apps in the monitoring & status pages category, ranked on GitHub stars, commits in the last year, Docker images, open-source licenses and recent commits.

  1. 1

    Uptime Kuma

    Easy-to-use self-hosted uptime monitor with status pages and 90+ notification channels.

    Uptime Kuma has 92,149 GitHub stars, uses the MIT license, ships a Docker image and had 1,359 commits in the last year; it replaces Datadog and Uptime Robot.

  2. 2

    Netdata

    Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

    Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,609 commits in the last year; it replaces Datadog and Pingdom.

  3. 3

    Grafana

    Dashboards and visualization for metrics, logs and traces from Prometheus, Loki and dozens of other sources.

    Grafana has 77,096 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 11,362 commits in the last year; it replaces Datadog and Grafana Cloud.

  4. 4

    Prometheus

    Metrics-based monitoring and alerting toolkit with a powerful query language, built for cloud-native systems.

    Prometheus has 66,381 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 2,592 commits in the last year; it replaces Datadog and Grafana Cloud.

  5. 5

    Glances

    Cross-platform system monitoring tool with a terminal, web and API interface.

    Glances has 33,740 GitHub stars, uses the LGPL-3.0 license, ships a Docker image and had 935 commits in the last year.

  6. 6

    SigNoz

    Open-source observability platform for logs, metrics and traces built on OpenTelemetry.

    SigNoz has 32,287 GitHub stars, uses the MIT license, ships a Docker image and had 1,939 commits in the last year; it replaces Datadog and Grafana Cloud.

  7. 7

    Grafana Loki

    Horizontally scalable log aggregation system inspired by Prometheus.

    Grafana Loki has 28,990 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 3,073 commits in the last year.

  8. 8

    Jaeger

    Distributed tracing platform for monitoring and troubleshooting microservices.

    Jaeger has 23,268 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 1,050 commits in the last year.

  9. 9

    Beszel

    Lightweight server monitoring hub with Docker stats, history and alerts.

    Beszel has 25,991 GitHub stars, uses the MIT license, ships a Docker image and had 701 commits in the last year.

  10. 10

    OpenObserve

    Petabyte-scale logs, metrics and traces platform that is a lighter alternative to Elasticsearch and Datadog.

    OpenObserve has 22,266 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 3,287 commits in the last year.

2 of 4 · 5 picks

Best for startups

Ranked for startups on GitHub stars, commits in the last year, Docker images, open-source licenses, project websites and recent commits.

  1. 1

    Uptime Kuma

    Easy-to-use self-hosted uptime monitor with status pages and 90+ notification channels.

    Uptime Kuma has 92,149 GitHub stars, uses the MIT license, ships a Docker image and had 1,359 commits in the last year; it replaces Datadog and Uptime Robot. For startups it also scores on a Docker image, a permissive license (MIT), a project website and a commit in the last 90 days.

  2. 2

    Prometheus

    Metrics-based monitoring and alerting toolkit with a powerful query language, built for cloud-native systems.

    Prometheus has 66,381 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 2,592 commits in the last year; it replaces Datadog and Grafana Cloud. For startups it also scores on a Docker image, a permissive license (Apache-2.0), a project website and a commit in the last 90 days.

  3. 3

    Netdata

    Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

    Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,609 commits in the last year; it replaces Datadog and Pingdom. For startups it also scores on a Docker image, an open-source license, a project website and a commit in the last 90 days.

  4. 4

    Grafana

    Dashboards and visualization for metrics, logs and traces from Prometheus, Loki and dozens of other sources.

    Grafana has 77,096 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 11,362 commits in the last year; it replaces Datadog and Grafana Cloud. For startups it also scores on a Docker image, an open-source license, a project website and a commit in the last 90 days.

  5. 5

    SigNoz

    Open-source observability platform for logs, metrics and traces built on OpenTelemetry.

    SigNoz has 32,287 GitHub stars, uses the MIT license, ships a Docker image and had 1,939 commits in the last year; it replaces Datadog and Grafana Cloud. For startups it also scores on a Docker image, a permissive license (MIT), a project website and a commit in the last 90 days.

3 of 4 · 5 picks

Best for small business

Ranked for small business on GitHub stars, commits in the last year, Docker images, open-source licenses, project websites, recent commits and deploy guides.

  1. 1

    Uptime Kuma

    Easy-to-use self-hosted uptime monitor with status pages and 90+ notification channels.

    Uptime Kuma has 92,149 GitHub stars, uses the MIT license, ships a Docker image and had 1,359 commits in the last year; it replaces Datadog and Uptime Robot, and appsgit has a step-by-step deploy guide for it. For small business it also scores on a Docker image, an open-source license, a project website, a commit in the last 90 days and an appsgit deploy guide.

  2. 2

    Grafana

    Dashboards and visualization for metrics, logs and traces from Prometheus, Loki and dozens of other sources.

    Grafana has 77,096 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 11,362 commits in the last year; it replaces Datadog and Grafana Cloud, and appsgit has a step-by-step deploy guide for it. For small business it also scores on a Docker image, an open-source license, a project website, a commit in the last 90 days and an appsgit deploy guide.

  3. 3

    Prometheus

    Metrics-based monitoring and alerting toolkit with a powerful query language, built for cloud-native systems.

    Prometheus has 66,381 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 2,592 commits in the last year; it replaces Datadog and Grafana Cloud, and appsgit has a step-by-step deploy guide for it. For small business it also scores on a Docker image, an open-source license, a project website, a commit in the last 90 days and an appsgit deploy guide.

  4. 4

    Netdata

    Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

    Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,609 commits in the last year; it replaces Datadog and Pingdom. For small business it also scores on a Docker image, an open-source license, a project website and a commit in the last 90 days.

  5. 5

    Glances

    Cross-platform system monitoring tool with a terminal, web and API interface.

    Glances has 33,740 GitHub stars, uses the LGPL-3.0 license, ships a Docker image and had 935 commits in the last year. For small business it also scores on a Docker image, an open-source license, a project website and a commit in the last 90 days.

4 of 4 · 5 picks

Best for enterprise and solo developers

Ranked for enterprise and solo developers (the same order for each) on GitHub stars, commits in the last year, Docker images, open-source licenses and recent commits.

  1. 1

    Uptime Kuma

    Easy-to-use self-hosted uptime monitor with status pages and 90+ notification channels.

    Uptime Kuma has 92,149 GitHub stars, uses the MIT license, ships a Docker image and had 1,359 commits in the last year; it replaces Datadog and Uptime Robot. For enterprise it also scores on an open-source license and a commit in the last 90 days.

  2. 2

    Netdata

    Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

    Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,609 commits in the last year; it replaces Datadog and Pingdom. For enterprise it also scores on an open-source license and a commit in the last 90 days.

  3. 3

    Grafana

    Dashboards and visualization for metrics, logs and traces from Prometheus, Loki and dozens of other sources.

    Grafana has 77,096 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 11,362 commits in the last year; it replaces Datadog and Grafana Cloud. For enterprise it also scores on an open-source license and a commit in the last 90 days.

  4. 4

    Prometheus

    Metrics-based monitoring and alerting toolkit with a powerful query language, built for cloud-native systems.

    Prometheus has 66,381 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 2,592 commits in the last year; it replaces Datadog and Grafana Cloud. For enterprise it also scores on an open-source license and a commit in the last 90 days.

  5. 5

    Glances

    Cross-platform system monitoring tool with a terminal, web and API interface.

    Glances has 33,740 GitHub stars, uses the LGPL-3.0 license, ships a Docker image and had 935 commits in the last year. For enterprise it also scores on an open-source license and a commit in the last 90 days.

FAQ

Questions and answers

Still curious? Email info@appsgit.com.

What is the best open source monitoring tool?

The best open source monitoring tool is Uptime Kuma, with 92,149 GitHub stars, the MIT license and a Docker image; Netdata and Grafana are strong alternatives. This page also breaks the picks down by team size and use: Uptime Kuma leads for startups, small business, enterprise and solo developers. The overall ranking weighs GitHub stars, commits in the last year, Docker images, open-source licenses and recent commits across the 20 apps in the monitoring & status pages category of the appsgit catalog.

Is Uptime Kuma free?

Yes. Uptime Kuma is open-source software released under the MIT license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.

Which open source monitoring tool is best for a startup?

Uptime Kuma ranks first for startups, with 92,149 GitHub stars, the MIT license and a Docker image; Prometheus and Netdata follow. The startups ranking adds points for Docker images, permissive licenses, project websites and recent commits on top of stars and activity.

Which open source monitoring tool is best for a small business?

Uptime Kuma ranks first for small business, with 92,149 GitHub stars, the MIT license and a Docker image; Grafana and Prometheus follow. The small business ranking adds points for Docker images, open-source licenses, project websites, recent commits and deploy guides on top of stars and activity.

Can I self-host these monitoring tools with Docker?

Yes, all of them. Uptime Kuma, Netdata and Grafana publish Docker images, so you can run them on a VPS or home server with Docker Compose.

Are all of these monitoring tools open source?

All 10 apps on this list are open source. You can self-host and modify each one under its license.

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