Best Observability Top 20
Top 20 most popular open-source Observability projects, ranked by GitHub Stars.
Netdata
80.2k StarsNetdata is an open-source real-time observability platform with second-resolution metrics, AI health checks and zero-config deployment, widely used for monitoring AI agent services.
Kong
44.0k StarsThe cloud-native API and AI Gateway providing LLM request routing, rate limiting, load balancing and observability for AI agent applications.
PostHog
37.7k StarsPostHog is a full-stack observability platform for AI agents and self-driving products, combining analytics, session replay, feature flags and error tracking.
Langfuse
33.2k StarsOpen-source LLM engineering platform providing tracing, evaluations, prompt management, and dataset management with integrations for LangChain, OpenAI, Anthropic, and more.
Prompt Optimizer
33.1k StarsAn AI prompt optimizer that helps users write better prompts and achieve improved AI results.
SigNoz
31.9k StarsSigNoz is an open-source OpenTelemetry-native observability platform combining APM, logs, metrics and alerts.
MLflow LLMOps
27.5k StarsMLflow LLM / GenAI extensions. One-stop LLMOps: prompt versioning, evaluation, model registry, tracing.
MLflow
27.5k StarsMLflow is the open-source AI engineering platform for debugging, evaluating, monitoring, and optimizing AI agents and LLM applications, with model and data access management.
12 Factor Agents
25.3k StarsWhat are the principles we can use to build LLM-powered software that is actually good enough to put in the hands of production customers?
Promptfoo
24.3k StarsTest and evaluate LLM prompts, agents, and RAG pipelines. Built-in red teaming and security evaluation for reliable AI applications.
Opik
21.4k StarsOpik is an open-source LLM observability platform providing agent tracing, evaluation testing, and prompt experiment management to help developers monitor and optimize AI agent systems.
Agents Towards Production
21.3k StarsEnd-to-end, code-first tutorials for building production-grade GenAI agents. From prototype to enterprise deployment.
openobserve
21.1k StarsOpenObserve is a high-performance observability platform for logs, metrics, and traces, well suited for monitoring AI agent runtimes and tool calls.
OpenAI Evals
19.2k StarsOpenAI's framework for evaluating LLMs and LLM systems, providing an open-source registry of benchmarks and tools for systematic model assessment.
ccusage
18.0k StarsAnalyze coding (agent) CLI token usage and costs from local data.
DeepEval
17.6k StarsDeepEval is an open-source evaluation framework for LLM applications. It provides rich evaluation metrics and tools, supporting unit testing and integration testing to help developers build reliable LLM applications.
RagaAI Catalyst
16.1k StarsRagaAI Catalyst is an observability, monitoring, and evaluation framework for Agent AI, supporting agent/LLM/tool tracing, multi-agent debugging, and self-hosted dashboard analytics.
Ragas
15.3k StarsRagas is a framework for evaluating RAG (Retrieval Augmented Generation) systems. It provides various evaluation metrics including faithfulness, answer relevance, context precision, helping developers optimize RAG application performance.
OpenMetadata
14.9k StarsOpenMetadata is a unified metadata platform for data and AI, providing data asset discovery, lineage, governance, and agent context retrieval capabilities.
LM Evaluation Harness
13.7k StarsA framework for few-shot evaluation of language models by EleutherAI, providing standardized evaluation pipelines supporting hundreds of benchmark tasks and widely adopted as a core LLM evaluation tool in the community.
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