Open Source Monitoring & Observability Tools
A curated collection of the best open source tools for monitoring system health, performance, and availability.
Self-hosted uptime monitoring with a clean dashboard
Stars
90,404Last commit
21 hours agoLicense
MIT
Monitors websites, APIs, and services with real-time alerts, a status page, and support for dozens of notification channels. Self-hosted and Docker-friendly.
Open Source Alternative to:
The leading distributed search and analytics engine
Stars
77,846Last commit
4 hours agoLicense
Unknown
Elasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
Open Source Alternative to:
Unified observability for metrics, logs, traces, and more
Stars
76,328Last commit
4 hours agoLicense
AGPL-3.0
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.
Open Source Alternative to:
Real-time monitoring for systems and applications
Stars
80,242Last commit
4 hours agoLicense
GPL-3.0
Powerful, efficient, and user-friendly monitoring solution for servers, containers, and applications with instant insights and alerts.
Open Source Alternative to:
Open source metrics collection, storage, and alerting
Stars
65,763Last commit
6 hours agoLicense
Apache-2.0
Pull-based monitoring system with a multi-dimensional data model, PromQL query language, built-in alerting, and a time series database built for cloud native environments.
Open Source Alternative to:
Real-time error tracking and performance monitoring
Stars
44,581Last commit
4 hours agoLicense
Unknown
Detect, diagnose, and resolve software issues quickly with powerful error tracking, performance monitoring, and release management.
Open Source Alternative to:
Open-source observability platform for cloud-native apps
Stars
31,892Last commit
4 hours agoLicense
MIT
Comprehensive monitoring and troubleshooting solution for microservices architectures, offering metrics, traces, and logs in a single pane.
Open Source Alternative to:
Advanced vulnerability detection and management platform
Stars
30,619Last commit
13 hours agoLicense
MIT
Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.
Open Source Alternative to:
Petabyte-scale observability, without the massive bill.
Stars
21,354Last commit
5 hours agoLicense
AGPL-3.0
Monitor logs, metrics, and traces with an open-source observability platform. Achieve petabyte scale with 140x lower storage costs and high performance.
Open Source Alternative to:
High-performance time series database for metrics and logs
Stars
17,573Last commit
6 hours agoLicense
Apache-2.0
Time series database and monitoring platform compatible with Prometheus, handling billions of metrics with lower resource usage than most alternatives.
Open Source Alternative to:
Centralize, transform, and stash your data
Stars
14,926Last commit
5 hours agoLicense
Unknown
Logstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired destination.
Open Source Alternative to:
Unify, automate, and elevate your monitoring workflow
Stars
12,230Last commit
11 hours agoLicense
MIT
Open-source platform for centralizing alerts, automating responses, and enhancing incident management across your tech stack.
Open Source Alternative to:
Professional status page system for transparent downtime communication
Stars
15,222Last commit
4 days agoLicense
Unknown
Open-source status page platform that helps organizations communicate system status and incidents effectively with customizable components and metrics tracking
Open Source Alternative to:
Beautiful open-source monitoring for modern infrastructure
Stars
10,638Last commit
5 hours agoLicense
AGPL-3.0
Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.
Open Source Alternative to:
Self-hosted session replay with complete data control
Stars
12,531Last commit
12 hours agoLicense
AGPL-3.0
Open-source session replay and product analytics platform you can self-host for complete control over data security, privacy, and compliance.
Open Source Alternative to:
Advanced automated status page for real-time monitoring
Stars
11,866Last commit
3 days agoLicense
Apache-2.0
A highly customizable monitoring solution that provides automated status pages, extensive alerting options, and detailed testing capabilities for your services and infrastructure
Open Source Alternative to:
Full-stack observability without the enterprise price tag
Stars
9,846Last commit
4 hours agoLicense
MIT
Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.
Open Source Alternative to:
Status page and uptime monitoring for growing teams
Stars
8,995Last commit
9 hours agoLicense
AGPL-3.0
Open-source status page and uptime monitor that tracks endpoints from 28 global regions, communicates incidents, and helps satisfy SOC 2 audit requirements.
Open Source Alternative to:
Get alerted when cron jobs and scheduled tasks miss their run
Stars
10,265Last commit
1 day agoLicense
BSD-3-Clause
Monitors cron jobs, background workers, and scheduled tasks by expecting periodic HTTP pings and alerting you when they stop arriving on time.
Open Source Alternative to:
Real-time observability for modern web applications
Stars
9,366Last commit
22 hours agoLicense
Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.
Open Source Alternative to:
Full-stack observability without code changes
Stars
7,881Last commit
2 days agoLicense
Apache-2.0
Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.
Open Source Alternative to:
Comprehensive monitoring and incident management platform
Stars
7,487Last commit
4 hours agoLicense
Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
Open Source Alternative to:
Auto-generated network diagrams that stay current
Stars
5,337Last commit
7 hours agoLicense
AGPL-3.0
Discovers your network via SNMP, LLDP, and ARP, then builds and maintains L2/L3 topology diagrams, host inventories, and service dependency maps automatically.
Open Source Alternative to:
Unified observability database for metrics, logs, and traces
Stars
6,554Last commit
8 hours agoLicense
Apache-2.0
Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
Open Source Alternative to:
Deploy a professional status page in minutes, no coding required
Stars
5,119Last commit
7 hours agoLicense
MIT
Free, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify subscribers instantly.
Open Source Alternative to:
Powerful observability made simple for developers
Stars
4,430Last commit
4 hours agoLicense
MIT
Logfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.
Open Source Alternative to:
Open source observability platform for modern applications
Stars
4,265Last commit
7 days agoLicense
AGPL-3.0
Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.
Open Source Alternative to:
Complete IT infrastructure monitoring made simple
Stars
2,347Last commit
4 hours agoLicense
GPL-2.0
Monitor your entire IT infrastructure with 2,000+ plugins, automated discovery, and scalable architecture. Open source and enterprise solutions available.
Open Source Alternative to:
Self-hosted error tracking for full control and scalability
Stars
2,024Last commit
7 hours agoLicense
Unknown
Bugsink offers real-time error tracking with self-hosting capabilities, allowing easy installation and connection to any app using Sentry-compatible SDKs.
Open Source Alternative to:
OpenTelemetry observability with traces, logs, and metrics
Stars
1,704Last commit
4 hours agoLicense
Unknown
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.
Open Source Alternative to:
Open source monitoring for complex IT infrastructure
Stars
2,232Last commit
2 days agoLicense
GPL-3.0
Monitor networks, servers, and cloud environments with flexible open-source solution. Custom checks, fast alerts, and complete infrastructure control.
Open Source Alternative to:
Complete infrastructure monitoring with 25+ years of expertise
Stars
2,040Last commit
13 days agoLicense
GPL-2.0
Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.
Open Source Alternative to:
All-in-one observability with unlimited data ingestion
Stars
1,700Last commit
4 hours agoLicense
AGPL-3.0
Unified platform for logs, metrics, traces and profiles with native compatibility for popular tools like OpenTelemetry, Prometheus, and Loki. No data silos, no usage limits.
Open Source Alternative to:
Self-hosted uptime monitoring you own and control
Stars
1,177Last commit
3 months agoLicense
MIT
Open-source uptime monitoring solution with real-time alerts, status pages, and comprehensive checks for websites, APIs, databases, and services.
Open Source Alternative to:
One self-hosted binary replaces Vercel, Sentry, and analytics tools
Stars
654Last commit
4 hours agoLicense
Apache-2.0
Self-hosted platform for small dev teams combining deployments, error tracking, analytics, session replay, uptime monitoring, and managed databases in one dashboard.
Open Source Alternative to:
Monitor, manage, and communicate service status effortlessly
Stars
975Last commit
2 years agoLicense
MIT
A powerful open-source status page system for real-time incident tracking, maintenance updates, and transparent communication with users.
Open Source Alternative to:
Self-hosted uptime monitoring that runs on your hardware, not their servers
Stars
68Last commit
30 days agoLicense
MIT
Deploy your own uptime and performance monitoring with HTTP/ICMP checks, multi-region probes, and custom status pages. MIT licensed, runs on minimal hardware.
Open Source Alternative to:
AI-powered root cause analysis for on-call alerts, self-hosted and air-gapped
Stars
35Last commit
2 days agoLicense
Apache-2.0
Receive alerts from Grafana, Datadog, and Prometheus with AI-generated root cause analysis. Self-hosted on Kubernetes, fully air-gapped capable, Apache 2.0 licensed.
Open Source Alternative to:
Self-hosted visual bug reporting with screenshot annotation
Stars
29Last commit
29 days agoLicense
AGPL-3.0
Embeds a lightweight widget into web apps so users can capture screenshots, annotate issues, and submit reports with console logs and browser metadata included.
Open Source Alternative to:
Complete website health monitoring and security scanning
Stars
15Last commit
3 months agoLicense
Unknown
Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
Open Source Alternative to:
Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.
Capture
Sevalla
Docmost