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Top 23 Java Monitoring Projects
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Distributed tracing as a discipline is older than most engineers writing about it think. Google's 2010 Dapper paper, by Sigelman and colleagues, is the canonical reference; Twitter open-sourced Zipkin in 2012 as a Dapper-inspired implementation, and Uber open-sourced Jaeger in 2017 on similar lineage. For most of the 2010s, however, the operational reality was vendor-specific: each APM (Datadog, New Relic, AppDynamics, Dynatrace) shipped its own SDK, and instrumenting an application meant choosing a vendor and accepting that the instrumentation work was, structurally, lock-in.
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Metrics
:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on. (by dropwizard)
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micrometer
An application observability facade for the most popular observability tools. Think SLF4J, but for observability.
Micrometer, a "vendor-neutral observability facade" offers this approach.
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OpenTelemetry Java Agent: for the backend. I could have also used Spring Actuator or the JMX exporter, but the agent is simpler for this project since it emits all 3 types of telemetry signals.
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Project mention: Dissecting the CPU-Memory Relationship in Garbage Collection (OpenJDK 26) | news.ycombinator.com | 2026-02-25
I built this 15 years ago and it got fairly popular, but is long dead now...
https://github.com/jmxtrans/jmxtrans
Kind of amazing how people are still building telemetry into Java.
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FlexyPool
FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand.
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Auditor
Hardware-based attestation and intrusion detection app for Android. It provides both local verification with another Android device via QR codes and optional scheduled server-based verification with support for alert emails. It uses hardware-backed keys and attestation support as the foundation and chains trust to the app for software checks.
Project mention: Public Trust Demands Open-Source Voting Systems | news.ycombinator.com | 2025-10-21> There's really no good practical solution to this problem.
Remote attestation via trusted execution environments is a thing. It is not a theoretical one either. See, for example, Graphene OS's Auditor app[0]. Solving this for voting machines in particular would be a matter of good design, not of solving fundamentally hard problems.
[0] https://attestation.app/
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Automon
Automon combines the power of AOP (AspectJ) with monitoring or logging tools you already use to declaratively trace and monitor your Java code, the JDK, and 3rd party libraries.
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inspectIT
(UNMAINTAINED) inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java Monitoring discussion
Java Monitoring related posts
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Next-Level Observability with OpenTelemetry
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JVM timing options
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Dissecting the CPU-Memory Relationship in Garbage Collection (OpenJDK 26)
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What are event driven architectures?
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Technique Avancée d'OpenRewrite : Utiliser les messages pour implémenter des logiques complexes
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Anna's Archive: An Update from the Team
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Apache HertzBeat is a real-time monitoring system
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A note from our sponsor - SaaSHub
www.saashub.com | 16 Jul 2026
Index
What are some of the best open-source Monitoring projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | DoraemonKit | 20,409 |
| 2 | zipkin | 17,442 |
| 3 | Pinpoint | 13,837 |
| 4 | Metrics | 7,846 |
| 5 | hertzbeat | 7,313 |
| 6 | micrometer | 4,864 |
| 7 | jmx_exporter | 3,313 |
| 8 | JavaMelody | 3,041 |
| 9 | snowflake | 2,241 |
| 10 | scouter | 2,176 |
| 11 | examples | 2,059 |
| 12 | Logbook | 2,051 |
| 13 | jmxtrans | 1,703 |
| 14 | sidekick | 1,603 |
| 15 | Glowroot | 1,347 |
| 16 | FlexyPool | 1,175 |
| 17 | opennms | 1,165 |
| 18 | Seyren | 862 |
| 19 | Jolokia | 846 |
| 20 | Auditor | 677 |
| 21 | Automon | 571 |
| 22 | inspectIT | 541 |
| 23 | NMapGUI | 503 |
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