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.

252 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

Observability110Uptime Monitoring43AI Agent Tools21API Development & Testing7Cloud Hosting7Uncategorized7Incident Management6Developer Infrastructure5

Evidence ranking

Leading projects in this ecosystem

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

#ToolHealthShippingStarsOpennessScore
1GrafanaOpen-source observability platform10010075.8kOpen core100
2Langfuse๐Ÿชข Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. ๐ŸŠYC W2310010032kOSI-approved OSS100
3SigNozSigNoz 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.10010031.7kOSI-approved OSS100
4PrefectPrefect is a workflow orchestration framework for building resilient data pipelines in Python.10010023.5kOSI-approved OSS100
5OpikDebug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.10010020.9kOSI-approved OSS100
6OpenObserveOpen 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.10010020.4kOSI-approved OSS100
7VictoriaMetricsVictoriaMetrics: fast, cost-effective monitoring solution and time series database10010017.4kOSI-approved OSS100
8Open SREBuild your own AI SRE agents. The open source toolkit for the AI era โœจ981009.3kOSI-approved OSS99
9BifrostFastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 ยตs overhead at 5k RPS.981006.8kOSI-approved OSS99
10RuViewฯ€ 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.989886.8kOSI-approved OSS99
11LiteLLMPython 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]989854.8kOSI-approved OSS99
12MastraFramework for building AI-powered applications and agents with TypeScript.9610026.6kOSI-approved OSS98
13TracecatOpen-source security automation platform for teams and AI agents96983.7kOSI-approved OSS98
14EffectBuild production-ready applications in TypeScript9510015kOSI-approved OSS98
15CentreonCentreon 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.95100162OSI-approved OSS98
16LatitudeLatitude is the open-source agent engineering platform95984.5kOSI-approved OSS97
17LangWatchThe platform for LLM evaluations and AI agent testing95983.4kOSI-approved OSS97
18HyperDXResolve production issues, fast. An open source observability platform unifying session replays, logs, metrics, traces and errors powered by ClickHouse and OpenTelemetry.931009.8kOSI-approved OSS97
19GreptimeDBThe open-source Observability 2.0 database. One engine for metrics, logs, and traces โ€” replacing Prometheus, Loki & ES.931006.5kOSI-approved OSS97
20OpenLITOpen source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. ๐Ÿš€๐Ÿ’ป Integrates with 50+ LLM Providers, VectorDBs, Agent Frameworks and GPUs.931002.7kOSI-approved OSS97
21SupervisionWe write your reusable computer vision tools. ๐Ÿ’œ969248.4kOSI-approved OSS96
22KomariSimple server monitoring tool.95985.5kOSI-approved OSS96
23ELMOOpen source AI visibility tracking.9398205OSI-approved OSS96
24AgentaThe open-source LLMOps platform: prompt playground, prompt management, LLM evaluation, and LLM observability all in one place.92984.4kOSI-approved OSS96
25ArthurMonitoring and governance platform for AI and ML.919885OSI-approved OSS96
26MCP Context ForgeAI gateway, registry, and proxy for MCP, A2A, and REST/gRPC APIs.95954.1kOSI-approved OSS95
27SentryDeveloper-first error tracking and performance monitoring939544.4kOSI-approved OSS95
28PyroscopeContinuous Profiling Platform. Debug performance issues down to a single line of code939511.6kOSI-approved OSS95
29VectorA high-performance observability data pipeline.939522.2kOSI-approved OSS95
30PrometheusThe Prometheus monitoring system and time series database.939565.3kOSI-approved OSS95
31OneUptimeComplete open-source monitoring and observability platform.92957.4kOSI-approved OSS95
32odigosDistributed tracing without code changes. ๐Ÿš€ Instantly monitor any application using OpenTelemetry and eBPF911003.7kOSI-approved OSS95
33TracewayThe only tool you need to know what is happening and how to fix it.91981kOSI-approved OSS95
34SnykDeveloper-first security platform91955.6kOSI-approved OSS95
35KitaruOpen-source platform layer for AI agents in production.9098223OSI-approved OSS95
36BottomYet another cross-platform graphical process/system monitor.949313.8kOSI-approved OSS94
37WavelogWebbased Amateur Radio Logging Software - Log your contacts from everywhere!9395492OSI-approved OSS94
38MLflowThe 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.919227.2kOSI-approved OSS94
39Backend.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.8898658OSI-approved OSS94
40AxonHubโšก๏ธ Open-source AI Gateway โ€” Use any SDK to call 100+ LLMs. Built-in failover, load balancing, cost control & end-to-end tracing.95954.8kOSI-approved OSS93
41DozzleRealtime log viewer for containers. Supports Docker, Swarm and K8s.939413.7kOSI-approved OSS93
42HolmesGPTSRE Agent - CNCF Sandbox Project93942.9kOSI-approved OSS93
43HOMEROpen-source SIP, VoIP, and RTC packet capture and monitoring platform.91982kOSI-approved OSS93
44Future AGIOpen-source platform for evaluating, observing, and improving LLM and AI agent applications.91891.5kOSI-approved OSS93
45Measure.shOpen source mobile monitoring that gets to the root cause.87951.3kOSI-approved OSS93
46TraceRootTraceRoot - open-source observability and self-healing layer for AI agents. YC S258695680OSI-approved OSS93
47JaegerDistributed tracing platform for monitoring and troubleshooting microservices.908923kOSI-approved OSS92
48LaminarLaminar - open-source observability platform purpose-built for AI agents. YC S24.90873.1kOSI-approved OSS92
49MapleOpenTelemetry observability platform.87951.6kOSI-approved OSS92
50LogTide๐Ÿ›ก๏ธ Open-source, self-hosted log management. Privacy-first alternative to Datadog & ELK. Lightweight, GDPR-compliant, and deployed in minutes with Docker.8595432OSI-approved OSS92

Also on evidence watch

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

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