ToolVitals
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Metrics, logs, traces, and incidents

Open Observability Stack

Source-visible observability, monitoring, logging, tracing, and incident-response projects compared across one operational ecosystem.

258 tracked50 ranked verdictsPublic evidence only

Buyer checklist

What to verify before adopting

  1. Which telemetry signals and OpenTelemetry workflows are first-class?
  2. What are the storage, retention, and high-cardinality tradeoffs?
  3. Does the project show healthy maintainer and release activity?

Explore this ecosystem by job

Observability109Uptime Monitoring44AI Agent Tools24Cloud Hosting8API Development & Testing7Incident Management7Uncategorized7Developer Infrastructure6

Evidence ranking

Leading projects in this ecosystem

Ordered by ToolVitals score, health, shipping, confidence, and adoption tie-breakers. Openness labels are shown explicitly.

#ToolHealthShippingStarsOpennessScore
1LiteLLMPython SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]999962kOSI-approved OSS99
2MastraFramework for building AI-powered applications and agents with TypeScript.989929.1kOSI-approved OSS98
3AgentaThe open-source LLMOps platform: prompt playground, prompt management, LLM evaluation, and LLM observability all in one place.98994.9kOSI-approved OSS98
4Future AGIOpen-source platform for evaluating, observing, and improving LLM and AI agent applications.98992.2kOSI-approved OSS98
5SentryDeveloper-first error tracking and performance monitoring989845.6kOSI-approved OSS98
6Langfuse๐Ÿชข Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. ๐ŸŠYC W23989836.5kOSI-approved OSS98
7EffectBuild production-ready applications in TypeScript989817.4kOSI-approved OSS98
8BifrostFastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 ยตs overhead at 5k RPS.98989.1kOSI-approved OSS98
9OpikDebug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.989722.9kOSI-approved OSS98
10OpenObserveOpen 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.989722.5kOSI-approved OSS98
11TraceRootTraceRoot - open-source observability and self-healing layer for AI agents. YC S2597981kOSI-approved OSS98
12WorldMonitorReal-time global intelligence dashboard. AI-powered news aggregation, geopolitical monitoring, and infrastructure tracking in a unified situational awareness interface979789.6kOSI-approved OSS97
13MLflowThe 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 and data.979728.5kOSI-approved OSS97
14Open SREBuild your own AI SRE agents. The open source toolkit for the AI era โœจ979712.5kOSI-approved OSS97
15Backend.AIBackend.AI is a streamlined, container-based computing cluster platform that hosts popular computing/ML frameworks and diverse programming languages, with pluggable heterogeneous accelerator support including CUDA GPU, ROCm GPU, Gaudi NPU, Google TPU, GraphCore IPU and other NPUs.9797676OSI-approved OSS97
16Firewallahttp://firewalla.com9797634OSI-approved OSS97
17RuViewฯ€ RuView: WiFi DensePose turns commodity WiFi signals into real-time human pose estimation, vital sign monitoring, and presence detection โ€” all without a single pixel of video.979699.5kOSI-approved OSS97
18PrometheusThe Prometheus monitoring system and time series database.979666.8kOSI-approved OSS97
19PrefectPrefect is a workflow orchestration framework for building resilient data pipelines in Python.979624.1kOSI-approved OSS97
20DozzleRealtime log viewer for containers. Supports Docker, Swarm and K8s.979614.7kOSI-approved OSS97
21HyperDXResolve production issues, fast. An open source observability platform unifying session replays, logs, metrics, traces and errors powered by ClickHouse and OpenTelemetry.979610kOSI-approved OSS97
22GreptimeDBThe open-source Observability 2.0 database. One engine for metrics, logs, and traces โ€” replacing Prometheus, Loki & ES.97966.8kOSI-approved OSS97
23SnykDeveloper-first security platform97965.7kOSI-approved OSS97
24CentreonCentreon is a network, system and application monitoring tool. Centreon is the only AIOps Platform Providing Holistic Visibility to Complex IT Workflows from Cloud to Edge.9796167OSI-approved OSS97
25LangWatchThe platform for LLM evaluations and AI agent testing96975kOSI-approved OSS97
26SupervisionWe write your reusable computer vision tools. ๐Ÿ’œ979651.4kOSI-approved OSS96
27SigNozSigNoz 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.979632.4kOSI-approved OSS96
28VictoriaMetricsVictoriaMetrics: fast, cost-effective monitoring solution and time series database979617.9kOSI-approved OSS96
29ManifestSmart Model Routing for Personal AI Agents. Cut Costs up to 70% ๐Ÿฆž๐Ÿ‘ง๐Ÿฆš97967.6kOSI-approved OSS96
30LibreNMSCommunity-based network monitoring system.97965kOSI-approved OSS96
31odigosDistributed tracing without code changes. ๐Ÿš€ Instantly monitor any application using OpenTelemetry and eBPF97963.7kOSI-approved OSS96
32OpenChoreoDeveloper platform for Kubernetes.97961.7kOSI-approved OSS96
33WavelogWebbased Amateur Radio Logging Software - Log your contacts from everywhere!9796576OSI-approved OSS96
34TraefikThe Cloud Native Application Proxy979565.4kOSI-approved OSS96
35MapleOpenTelemetry observability platform.96971.9kOSI-approved OSS96
36bagofwordsChat with your data - with memory, rules, and observability built in. Deploy in 2 minutes9697463OSI-approved OSS96
37InnerWardenAutonomous EDR for Linux with kernel-level eBPF detection and AI triage.9697164OSI-approved OSS96
38CASELightweight backend-as-a-service with essential features.96967.6kOSI-approved OSS96
39LatitudeLatitude is the open-source agent engineering platform96964.7kOSI-approved OSS96
40TracecatOpen-source security automation platform for teams and AI agents96963.9kOSI-approved OSS96
41HOMEROpen-source SIP, VoIP, and RTC packet capture and monitoring platform.96962kOSI-approved OSS96
42ELMOOpen source AI visibility tracking.9696491OSI-approved OSS96
43ArthurMonitoring and governance platform for AI and ML.969692OSI-approved OSS96
44VectorA high-performance observability data pipeline.969522.8kOSI-approved OSS96
45PyroscopeContinuous Profiling Platform. Debug performance issues down to a single line of code969511.7kOSI-approved OSS96
46TracewayThe only tool you need to know what is happening and how to fix it.96951.7kOSI-approved OSS96
47TempsSelf host your own Vercel9597867OSI-approved OSS96
48Measure.shOpen source mobile monitoring that gets to the root cause.95961.4kOSI-approved OSS96
49NetdataThe fastest path to AI-powered full stack observability, even for lean teams.969581.1kOSI-approved OSS95
50TDengineHigh-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios969525.2kOSI-approved OSS95

Also on evidence watch

Tracked matches that need stronger public evidence before receiving a ranked verdict.

Admyral90 confidenceAether Status90 confidenceAgyn Platform90 confidenceAI Error Tracking Platform90 confidenceAI Gateway90 confidenceAiCMO90 confidenceAkmatori90 confidencealtk-evolve90 confidenceApache SkyWalking90 confidenceArconia90 confidenceArki Uptime90 confidenceAurora90 confidenceAxonHub90 confidenceBaselinr90 confidenceBeaconchain Dashboard90 confidenceBeaver Iot90 confidenceBeszel90 confidencebitwobbly90 confidenceBottom90 confidenceButler-SOS90 confidenceCassini90 confidenceCertimate90 confidencechangedetection.io90 confidenceChaos Genius90 confidence