Top 13 Java Observability Projects

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1. skywalking

   1 30 24,918 9.3 Java

   APM, Application Performance Monitoring System

   

   Project mention: Apache SkyWalking: APM system designed for microservices, cloud native | news.ycombinator.com | 2025-08-20

2. SaaSHub

   www.saashub.com sponsored

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. zipkin

   2 43 17,451 6.7 Java

   Zipkin is a distributed tracing system

   

   Project mention: Why Your Logs Are Useless Without Traces | dev.to | 2026-05-22

   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.

4. hertzbeat

   3 16 7,357 9.4 Java

   An AI-powered next-generation open source real-time observability system.

   

5. micrometer

   4 12 4,882 9.8 Java

   An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

   

   Project mention: JVM timing options | dev.to | 2026-02-26

   Micrometer, a "vendor-neutral observability facade" offers this approach.

6. Logbook

   5 5 2,059 8.8 Java

   An extensible Java library for HTTP request and response logging

   

7. odd-platform

   6 33 1,422 9.0 Java

   First open-source data discovery and observability platform. We make a life for data practitioners easy so you can focus on your business.

   

8. Automon

   7 0 571 9.6 Java

   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.

   

9. tracing

   8 0 295 9.5 Java

   Provides tracing abstractions over tracers and tracing system reporters. (by micrometer-metrics)

   

10. aws-otel-java-instrumentation

    9 3 104 8.9 Java

    AWS Distro for OpenTelemetry Java Instrumentation Library

    

    Project mention: Spring AI with Amazon Bedrock - Part 6 Adding AgentCore Observability | dev.to | 2026-04-02

    ADD https://github.com/aws-observability/aws-otel-java-instrumentation/releases/latest/download/aws-opentelemetry-agent.jar /opt/aws-opentelemetry-agent.jar ENV JAVA_TOOL_OPTIONS=-javaagent:/opt/aws-opentelemetry-agent.jar \ AGENT_OBSERVABILITY_ENABLED=true \ OTEL_RESOURCE_ATTRIBUTES=service.name=agentcore_runtime_spring_ai_demo,aws.log.group.names=/aws/bedrock-agentcore/runtimes/agentcore_runtime_spring_ai_demo-tD7f1W6RGi \ OTEL_EXPORTER_OTLP_LOGS_HEADERS=x-aws-log-group=/aws/bedrock-agentcore/runtimes/agentcore_runtime_spring_ai_demo-tD7f1W6RGi,x-aws-log-stream=runtime-logs,x-aws-metric-namespace=bedrock-agentcore \ OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf \ OTEL_EXPORTER_OTLP_TRACES_PROTOCOL=http/protobuf \ OTEL_TRACES_EXPORTER=otlp \ OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=https://xray.us-east-1.amazonaws.com/v1/traces \ OTEL_EXPORTER_OTLP_LOGS_PROTOCOL=http/protobuf \ OTEL_LOGS_EXPORTER=otlp \ OTEL_EXPORTER_OTLP_LOGS_ENDPOINT=https://logs.us-east-1.amazonaws.com/v1/logs

11. distributed-rate-limiter

    10 4 78 8.6 Java

    High-performance distributed rate limiter service with Redis backend. Supports token bucket and sliding window algorithms, dynamic configuration, and real-time metrics. Built for microservices architectures.

    

    Project mention: Show HN: Production-ready rate limiter with Web Dashboard and 5 algorithms | news.ycombinator.com | 2025-10-23

12. container-jfr

    11 1 56 9.7 Java

    Self-hosted performance data capture, storage, and analysis for containerized JVMs

    

13. itara

    12 1 21 8.5 Java

    Distributed system topology as a declared, verifiable, executable layer — change how your components connect without touching code.

    

    Project mention: Show HN: Itara – Distributed system topology as an explicit, executable layer | news.ycombinator.com | 2026-07-12

14. Middleware Android SDK for Real User Monitoring

    13 0 2 7.1 Java

    Middleware Android RUM SDK

    

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• A note from our sponsor - SaaSHub
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  SaaSHub helps you find the best software and product alternatives Learn more →

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