Open-source startups in Observability

A fancy self-hosted monitoring tool

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

The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

Developer-first error tracking and performance monitoring

macOS system monitor in your menu bar

Best and simplest tool for website change detection, web page monitoring, and website change alerts. Perfect for tracking content changes, price drops, restock alerts, and website defacement monitoring—all for free or enjoy our SaaS plan!

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 with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.

Lightweight server monitoring with historical data, docker stats, and alerts.

Open source observability platform for logs, metrics, traces, RUM (web, android, ios), Session replay, pipelines, SLO and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.

Effortlessly compose, extend, and observe every service in real-time for the first time ever.

VictoriaMetrics: fast, cost-effective monitoring solution and time series database

Zipkin is a distributed tracing system

⬆️ GitHub Actions uptime monitor & status page by @AnandChowdhary

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ https://windows-internals.com

🚦 Cachet, the open source, self-hosted status page system.

Self-hosted Speed Test for HTML5 and more. Easy setup, examples, configurable, mobile friendly. Supports PHP, Node, Multiple servers, and more

APM, (Application Performance Management) tool for large-scale distributed systems.

Nightingale is to monitoring and alerting what Grafana is to visualization.

The open-source AIOps and alert management platform

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.

Continuous Profiling Platform. Debug performance issues down to a single line of code

Checkmate 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 :)

Open-source cron job and background task monitoring service, written in Python & Django