apm

Developer-first error tracking and performance monitoring

SigNoz is an open-source, OpenTelemetry-native observability platform for your team and their AI agents. Get logs, metrics, and traces in one tool with features like APM, distributed tracing, log management, infra monitoring, etc. Combined with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.

APM, Application Performance Monitoring System

Open source observability platform for logs, metrics, traces, frontend monitoring, pipelines and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.

CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

APM, (Application Performance Management) tool for large-scale distributed systems.

Resolve production issues, fast. An open source observability platform unifying session replays, logs, metrics, traces and errors powered by ClickHouse and OpenTelemetry.

highlight.io: The open source, full-stack monitoring platform. Error monitoring, session replay, logging, distributed tracing, and more.

📌 a missing Java std lib(simple & 0-dependency) for framework/middleware, provide an enhanced InheritableThreadLocal that transmits values between threads even using thread pooling components.

Coroot is an open-source observability and APM tool with AI-powered Root Cause Analysis. It combines metrics, logs, traces, continuous profiling, and SLO-based alerting with predefined dashboards and inspections.

【免费社区版】【企业版】Webfunny是一款集全链路监控和埋点系统于一体的大数据分析系统，我们致力于解决线上的疑难杂症和精细化分析业务数据；监控系统面向技术、埋点系统面向业务，两者配合使用，相得益彰。

Open source APM: OpenTelemetry traces, metrics, and logs

eBPF Observability - Distributed Tracing and Profiling

Observe any stack, any service and any data, using any UI components you prefer, never missing any X factors and resolve them before they become real problems.

High performance Java APM. Powered by ASM. Try it. Test it. If you feel its better, use it.

JavaMelody : monitoring of JavaEE applications

An enterprise-grade Cloud-Native application platform for Kubernetes.

Parseable is an open source, unified infrastructure observability platform built in Rust on a data lake architecture. It tracks logs, metrics, traces, and events across apps, agents, and systems, reducing storage costs by up to 90% through columnar telemetry compression.

Fast and Lightweight Observability Data Collector

Scouter is an open source APM (Application Performance Management) tool.

The .NET/.NET Core instrument agent for Apache SkyWalking

📱⚡️ Lighthouse for Mobile - audits your app and gives a performance score to your Android apps (native, React Native, Flutter..). Measure performance on CLI, E2E tests, CI...

Open source monitoring and visualization UI for the TICK stack

Web UI for Jaeger

MWOSD - UAV HUD

Measure helps mobile teams monitor and fix crashes, ANRs, bugs, and performance issues. The open source alternative to Firebase Crashlytics.

Monitor performance of you Rails applications (self-hosted and free)

The official Airbrake library for Ruby applications

The Java agent for Apache SkyWalking