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The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

The Prometheus monitoring system and time series database.

We write your reusable computer vision tools. 💜

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.

Scalable datastore for metrics, events, and real-time analytics

High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios

APM, Application Performance Monitoring System

A high-performance observability data pipeline.

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。

Daemon for easy but powerful stats aggregation

Agent for collecting, processing, aggregating, and writing metrics, logs, and other arbitrary data.

Highly available Prometheus setup with long term storage capabilities. A CNCF Incubating project.

Exporter for machine metrics

Nightingale is to monitoring and alerting what Grafana is to visualization.

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.

Fathom Lite. Simple, privacy-focused website analytics. Built with Golang & Preact.

Open-source observability for your GenAI or LLM application, based on OpenTelemetry

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

The open-source Observability 2.0 database. One engine for metrics, logs, and traces — replacing Prometheus, Loki & ES.

Add-on agent to generate and expose cluster-level metrics.

A highly scalable real-time graphing system

Real-time monitoring of IT components and services, such as networks, servers, VMs, applications and the cloud.

High-level library to help with training and evaluating neural networks in PyTorch flexibly and transparently.

AI observability platform for production LLM and agent systems.

A network event stream processing system, in Clojure.

Hubble - Network, Service & Security Observability for Kubernetes using eBPF

Open source APM: OpenTelemetry traces, metrics, and logs

Distributed tracing without code changes. 🚀 Instantly monitor any application using OpenTelemetry and eBPF