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.

255 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

Observability108Uptime Monitoring43AI Agent Tools24Cloud Hosting8Incident Management7Uncategorized7API Development & Testing6Developer 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
1SentryDeveloper-first error tracking and performance monitoring999944.8kOSI-approved OSS99
2MastraFramework for building AI-powered applications and agents with TypeScript.999927.9kOSI-approved OSS99
3LiteLLMPython 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]989958.4kOSI-approved OSS98
4Langfuse๐Ÿชข Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. ๐ŸŠYC W23989834.4kOSI-approved OSS98
5OpikDebug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.989821.9kOSI-approved OSS98
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.989821.7kOSI-approved OSS98
7EffectBuild production-ready applications in TypeScript989815.9kOSI-approved OSS98
8Open SREBuild your own AI SRE agents. The open source toolkit for the AI era โœจ989811kOSI-approved OSS98
9BifrostFastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 ยตs overhead at 5k RPS.98988kOSI-approved OSS98
10Future AGIOpen-source platform for evaluating, observing, and improving LLM and AI agent applications.98982kOSI-approved OSS98
11WavelogWebbased Amateur Radio Logging Software - Log your contacts from everywhere!9898531OSI-approved OSS98
12PrometheusThe Prometheus monitoring system and time series database.989766kOSI-approved OSS98
13LangWatchThe platform for LLM evaluations and AI agent testing97983.5kOSI-approved OSS98
14MLflowThe 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.989727.9kOSI-approved OSS97
15SnykDeveloper-first security platform98975.7kOSI-approved OSS97
16AxonHubโšก๏ธ Open-source AI Gateway โ€” Use any SDK to call 100+ LLMs. Built-in failover, load balancing, cost control & end-to-end tracing.98975.2kOSI-approved OSS97
17LibreNMSCommunity-based network monitoring system.98974.9kOSI-approved OSS97
18OneUptimeComplete open-source monitoring and observability platform.97987.6kOSI-approved OSS97
19TempsSelf host your own Vercel9798741OSI-approved OSS97
20NetdataThe fastest path to AI-powered full stack observability, even for lean teams.979780.5kOSI-approved OSS97
21SigNozSigNoz 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.979732.1kOSI-approved OSS97
22PrefectPrefect is a workflow orchestration framework for building resilient data pipelines in Python.979723.8kOSI-approved OSS97
23VectorA high-performance observability data pipeline.979722.5kOSI-approved OSS97
24VictoriaMetricsVictoriaMetrics: fast, cost-effective monitoring solution and time series database979717.7kOSI-approved OSS97
25HyperDXResolve production issues, fast. An open source observability platform unifying session replays, logs, metrics, traces and errors powered by ClickHouse and OpenTelemetry.97979.9kOSI-approved OSS97
26ManifestSmart Model Routing for Personal AI Agents. Cut Costs up to 70% ๐Ÿฆž๐Ÿ‘ง๐Ÿฆš97977.5kOSI-approved OSS97
27CASELightweight backend-as-a-service with essential features.97977.5kOSI-approved OSS97
28GreptimeDBThe open-source Observability 2.0 database. One engine for metrics, logs, and traces โ€” replacing Prometheus, Loki & ES.97976.7kOSI-approved OSS97
29LatitudeLatitude is the open-source agent engineering platform97974.6kOSI-approved OSS97
30TracecatOpen-source security automation platform for teams and AI agents97973.8kOSI-approved OSS97
31Performance Co-PilotPerformance Co-Pilot97971.1kOSI-approved OSS97
32Backend.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.9797670OSI-approved OSS97
33Firewallahttp://firewalla.com9797627OSI-approved OSS97
34ArthurMonitoring and governance platform for AI and ML.979788OSI-approved OSS97
35TDengineHigh-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios979625.1kOSI-approved OSS97
36MCP Context ForgeAI gateway, registry, and proxy for MCP, A2A, and REST/gRPC APIs.97964.4kOSI-approved OSS97
37odigosDistributed tracing without code changes. ๐Ÿš€ Instantly monitor any application using OpenTelemetry and eBPF97963.7kOSI-approved OSS97
38CentreonCentreon 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.9796162OSI-approved OSS97
39bagofwordsChat with your data - with memory, rules, and observability built in. Deploy in 2 minutes9698453OSI-approved OSS97
40TraceRootTraceRoot - open-source observability and self-healing layer for AI agents. YC S259697764OSI-approved OSS97
41RuViewฯ€ 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.979693kOSI-approved OSS96
42HOMEROpen-source SIP, VoIP, and RTC packet capture and monitoring platform.97962kOSI-approved OSS96
43OpenChoreoDeveloper platform for Kubernetes.97961.5kOSI-approved OSS96
44Percona PMMPercona Monitoring and Management: an open source database monitoring, observability and management tool97961.1kOSI-approved OSS96
45ELMOOpen source AI visibility tracking.9796313OSI-approved OSS96
46SupervisionWe write your reusable computer vision tools. ๐Ÿ’œ979550kOSI-approved OSS96
47InnerWardenAutonomous EDR for Linux with kernel-level eBPF detection and AI triage.9697164OSI-approved OSS96
48DozzleRealtime log viewer for containers. Supports Docker, Swarm and K8s.969614.3kOSI-approved OSS96
49CheckmateCheckmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Don't be shy, join here: https://discord.com/invite/NAb6H3UTjK :)969610.8kOSI-approved OSS96
50TracewayThe only tool you need to know what is happening and how to fix it.96961.5kOSI-approved OSS96

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