LLM observability: tools for developers

Monitoring, traces, evaluation and quality tracking for LLM applications. An entry can appear under several use cases when its topics or description provide several explicit signals.

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117 entries in this view.

Tool ranking

Ranked by measured growth, normalized across sources. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    Skill
    Active

    Open-source infrastructure that turns scattered SKILL.md files into curated, retrieval-ready agent-skill corpora—with retrieval and evaluation tooling included.

    PythonLicense: Apache-2.0
    • agent-memory
    • agent-skills
    • ai-agents
    • benchmark
    • dataset

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/EverMind-AI/SkillCorpus ~/.claude/skills/SkillCorpus

    424GitHub stars+170 (+66.9 %)
  2. 2

    Other
    Active

    Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI…

    TypeScriptLicense: MIT
    • ci
    • ci-cd
    • cicd
    • evaluation
    • evaluation-framework

    githubmeasured growthOpen source ↗

    24 768GitHub stars+142 (+0.58 %)
  3. 3

    Other
    Active

    Mastra is the modern TypeScript framework for AI-powered applications and agents.

    TypeScript
    • agents
    • ai
    • chatbots
    • evals
    • javascript

    githubmeasured growthOpen source ↗

    27 658GitHub stars+128 (+0.46 %)
  4. 4

    Other
    Active

    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…

    TypeScriptLicense: AGPL-3.0
    • analytics
    • apm
    • datadog
    • elasticsearch
    • grafana

    githubmeasured growthOpen source ↗

    21 615GitHub stars+96 (+0.45 %)
  5. 5

    Other
    Active

    The fastest path to AI-powered full stack observability, even for lean teams.

    GoLicense: GPL-3.0
    • ai
    • alerting
    • cncf
    • data-visualization
    • database

    githubmeasured growthOpen source ↗

    80 412GitHub stars+85 (+0.11 %)
  6. 6

    Agent
    Active

    The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables teams of all sizes to debug, evaluate, monitor, and optimize production-quality AI applications while controlling costs and managing access to models…

    PythonLicense: Apache-2.0
    • agentops
    • agents
    • ai
    • ai-governance
    • apache-spark

    githubmeasured growthOpen source ↗

    27 783GitHub stars+82 (+0.30 %)
  7. 7

    Library
    Active

    Prefect is a workflow orchestration framework for building resilient data pipelines in Python.

    PythonLicense: Apache-2.0
    • automation
    • data
    • data-engineering
    • data-ops
    • data-science

    githubmeasured growthOpen source ↗

    23 766GitHub stars+66 (+0.28 %)
  8. 8

    Skill
    Active

    Multi-tier framework for evaluating AI agent skills with quality gates, semantic overlap detection, synthetic evaluation dataset generation, and live agent evaluation that measures how skills affect agent behavior.

    PythonLicense: Apache-2.0
    • agent-evaluation
    • agent-security
    • agent-skills
    • agentic-ai
    • benchmark

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/NVIDIA/SkillEvaluator ~/.claude/skills/SkillEvaluator

    389GitHub stars+57 (+17.2 %)
  9. 9

    Other
    Active

    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…

    TypeScript
    • apm
    • application-monitoring
    • distributed-tracing
    • go
    • good-first-issue

    githubmeasured growthOpen source ↗

    32 003GitHub stars+50 (+0.16 %)
  10. 10

    Other
    Active

    A high-performance observability data pipeline.

    RustLicense: MPL-2.0
    • agent
    • cloud-native
    • data-transformation
    • datadog
    • etl

    githubmeasured growthOpen source ↗

    22 509GitHub stars+40 (+0.18 %)
  11. 11

    Skill
    Active

    YAO = Yielding AI Outcomes. A rigorous engineering, evaluation, governance, and portability system for reusable agent skills.

    PythonLicense: MIT
    • agent-skills
    • ai-agents
    • evaluation
    • governance
    • meta-skill

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/yaojingang/yao-meta-skill ~/.claude/skills/yao-meta-skill

    2 577GitHub stars+35 (+1.4 %)
  12. 12

    Agent
    Active

    DataBuff is an AI-native APM built on Opentelemetry，with multi-agent troubleshooting out of the box.

    JavaLicense: AGPL-3.0
    • aiops
    • apm
    • application-monitoring
    • devops
    • distributed-tracing

    githubmeasured growthOpen source ↗

    642GitHub stars+32 (+5.2 %)
  13. 13

    MCP
    Active

    🫖 Status page with uptime monitoring & API monitoring as code 🫖

    TypeScriptLicense: AGPL-3.0
    • alerting
    • incident-management
    • mcp
    • mcp-server
    • monitoring

    githubmeasured growthOpen source ↗

    9 056GitHub stars+31 (+0.34 %)
  14. 14

    Other
    Active

    the LLM vulnerability scanner

    PythonLicense: Apache-2.0
    • ai
    • llm-evaluation
    • llm-security
    • security-scanners
    • vulnerability-assessment

    githubmeasured growthOpen source ↗

    9 079GitHub stars+31 (+0.34 %)
  15. 15

    Other
    Active

    eBPF-based Networking, Security, and Observability

    GoLicense: Apache-2.0
    • bpf
    • cncf
    • cni
    • containers
    • ebpf

    githubmeasured growthOpen source ↗

    25 047GitHub stars+29 (+0.12 %)
  16. 16

    Skill
    Active

    Build tested agent skills and govern their lifecycle through a user-defined marketplace: evidence, discovery, updates, rollback, quarantine, and 17-platform distribution.

    PythonLicense: MIT
    • agent-skills
    • ai-agents
    • claude-code
    • codex
    • cursor

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/FrancyJGLisboa/agent-skill-creator ~/.claude/skills/agent-skill-creator

    2 367GitHub stars+28 (+1.2 %)
  17. 17

    Skill
    Active

    Deletion-first Agent Skill for removing test bloat, verification theater, and speculative fallbacks while preserving behavior.

    PythonLicense: MIT
    • agent-skills
    • claude
    • claude-ai
    • claude-code
    • claude-skills

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/MrZoyo/deslop-GPT ~/.claude/skills/deslop-GPT

    55GitHub stars+27 (+96.4 %)
  18. 18

    Other
    Active

    Evidence-first infrastructure for reproducible, isolated executable evaluation and online rewards.

    PythonLicense: Apache-2.0
    • benchmark
    • kubernetes
    • llm-evaluation
    • llm-infrastructure
    • ray

    githubmeasured growthOpen source ↗

    140GitHub stars+24 (+20.7 %)
  19. 19

    Agent
    Active

    The Operating System for Scalable Enterprise AI Agents - Run, orchestrate, and deploy Compliant Enterprise AI Agents at scale across frameworks, without lock-in, rewrites or fragile glue code. Native support for MCP, A2A. Interface with all…

    PythonLicense: Apache-2.0
    • a2a
    • adk
    • ai-agents
    • aws
    • azure

    githubmeasured growthOpen source ↗

    156GitHub stars+19 (+13.9 %)
  20. 20

    Skill
    Active

    Research-backed, eval-driven skills for AI agents

    PythonLicense: Apache-2.0
    • agent-skills
    • ai-agents
    • codex
    • design
    • evals

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/ZSeven-W/craft-skills ~/.claude/skills/craft-skills

    142GitHub stars+18 (+14.5 %)
  21. 21

    MCP
    Active

    A Go framework for building production agent systems with graph workflows, tools, memory, A2A, AG-UI, MCP, evaluation, and observability.

    GoLicense: Apache-2.0
    • a2a
    • a2a-protocol
    • ag-ui
    • agent
    • agent-framework

    githubmeasured growthOpen source ↗

    1 759GitHub stars+18 (+1.0 %)
  22. 22

    Skill
    Active

    The Fable Workflow: how Claude Fable 5 worked, distilled into skills any model can run, with the eval that keeps it honest. Think / act / prove.

    PythonLicense: MIT
    • agent-skills
    • ai-agents
    • claude
    • claude-code
    • claude-md

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/Sahir619/fable-method ~/.claude/skills/fable-method

    2 272GitHub stars+16 (+0.71 %)
  23. 23

    Skill
    Active

    A test runner for agentskills.io-style AI agent skills

    TypeScriptLicense: MIT
    • agent-evals
    • agent-skills
    • agentskills
    • ai-agents
    • cli

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/darkrishabh/agent-skills-eval ~/.claude/skills/agent-skills-eval

    719GitHub stars+13 (+1.8 %)
  24. 24

    Agent
    Active

    eBPF-powered network observability for Kubernetes. Indexes L4/L7 traffic with full K8s context, decrypts TLS without keys. Queryable by AI agents via MCP and humans via dashboard.

    GoLicense: Apache-2.0
    • cloud-native
    • devops
    • docker
    • ebpf
    • golang

    githubmeasured growthOpen source ↗

    12 068GitHub stars+8 (+0.07 %)
  25. 25

    Skill
    Active

    The container platform tailored for Kubernetes multi-cloud, datacenter, and edge management ⎈ 🖥 ☁️

    Go
    • agent-skills
    • ai
    • cloud-native
    • cncf
    • devops

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/kubesphere/kubesphere ~/.claude/skills/kubesphere

    17 037GitHub stars+8 (+0.05 %)