Open source observability projects
Every project in the registry tagged observability, ranked by real GitHub adoption.
Open source LLM engineering platform for AI-powered applications
Open-source observability platform for cloud-native apps
Distributed tracing, metrics, logs, and GenAI monitoring in one
Python-native workflow orchestration for data and ML teams
CNCF Jaeger, a Distributed Tracing Platform
High-performance time series database for metrics and logs
Zipkin is a distributed tracing system
Build production-ready applications in TypeScript
Apache Doris is a real-time analytics and hybrid search database for AI agents.
Highly available Prometheus setup with long term storage capabilities. A CNCF Incubating project.
Continuous Profiling Platform. Debug performance issues down to a single line of code
Build your own AI SRE agents. The open source toolkit for the AI era.
Free, local tool to track AI coding token usage and cost across 37 tools and agents (Claude Code, Cursor, Codex, Gemini and more), by model, project, and task.
Real-time observability for modern web applications
Status page and uptime monitoring for growing teams
Full-stack observability without code changes
Comprehensive monitoring and incident management platform
OpenTelemetry Collector
Unified observability database for metrics, logs, and traces
Add-on agent to generate and expose cluster-level metrics.
Production-safe dynamic tracing and diagnostics for Java applications—attach to live JVMs with no restart or recompilation.
Open Source Cloud Native Application Protection Platform (CNAPP)
Deploy a professional status page in minutes, no coding required
Simulation-based testing and evaluation for AI agents
Powerful observability made simple for developers
Hubble - Network, Service & Security Observability for Kubernetes using eBPF
Open source observability platform for modern applications
Main repository for Datadog Agent
Real-time stream processing made simple and affordable
Monoscope lets you ingest and explore your logs, traces and metrics. We store these in S3 compatible buckets. Query in natural language via LLMs.
Intelligence for Kubernetes. World's most promising Kubernetes Visualization Tool for Developer and Platform Engineering teams.
All-in-one observability with unlimited data ingestion
OpenChoreo is an internal developer platform for Kubernetes
Langtrace 🔍 is an open-source, Open Telemetry based end-to-end observability tool for LLM applications, providing real-time tracing, evaluations and metrics f
Kuvasz (pronounce as [ˈkuvɒs]) is an open-source uptime and SSL monitoring service, with multiple notification channels, status pages, IAC support via YAML, Pro
Self-hosted monitoring for Docker, Kubernetes and uptime. Single Go binary, no agent config, live alerts. Drop a container, your stack is monitored.
LLM observability: cost, latency, and traces in one place
Related tags
Frequently asked questions
How many open source observability projects are there?
This registry tracks 37 projects tagged observability, with 358,189 GitHub stars between them. The most-adopted is Langfuse at 34,729 stars.
Are these observability projects free to use?
Yes — 34 of the 37 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which observability project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these observability projects still maintained?
35 of the 37 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.