Best Open Source Monitoring & Observability Software
Browse 47 production-ready, self-hostable open-source tools in Monitoring & Observability. Eliminate per-seat SaaS costs, retain complete data ownership, and claim $100K+ in startup cloud hosting credits.
Top Open-Source Monitoring & Observability Software Compared
Direct overview of top-ranked solutions by community stars and license
| Tool Name | GitHub Stars | License | Replaces Proprietary | Details |
|---|---|---|---|---|
| Healthchecks | ★ 93,150 | BSD-3-Clause | BetterStack, UptimeRobot | View Stack → |
| Cachet | ★ 93,150 | Open Source | BetterStack, incident.io | View Stack → |
| Checkmate | ★ 93,150 | AGPL-3.0 | BetterStack, UptimeRobot | View Stack → |
| EasyMonitor | ★ 93,150 | MIT | BetterStack, UptimeRobot | View Stack → |
| Gatus | ★ 93,150 | Apache-2.0 | BetterStack, UptimeRobot | View Stack → |
All 47 Monitoring & Observability Open Source Tools
Ranked by GitHub community stars & active adoption
Healthchecks
BSD-3-ClauseMonitors cron jobs, background workers, and scheduled tasks by expecting periodic HTTP pings and alerting you when they stop arriving on time.
Cachet
Open SourceOpen-source status page platform that helps organizations communicate system status and incidents effectively with customizable components and metrics tracking
Checkmate
AGPL-3.0Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.
EasyMonitor
MITDeploy your own uptime and performance monitoring with HTTP/ICMP checks, multi-region probes, and custom status pages. MIT licensed, runs on minimal hardware.
Gatus
Apache-2.0A highly customizable monitoring solution that provides automated status pages, extensive alerting options, and detailed testing capabilities for your…
Kener
MITFree, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify…
OneUptime
Apache-2.0All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
OpenStatus
AGPL-3.0Open-source status page and uptime monitor that tracks endpoints from 28 global regions, communicates incidents, and helps satisfy SOC 2 audit requirements.
Peekaping
MITOpen-source uptime monitoring solution with real-time alerts, status pages, and comprehensive checks for websites, APIs, databases, and services.
Statusnook
MITA powerful open-source status page system for real-time incident tracking, maintenance updates, and transparent communication with users.
StatusScout
Open SourceMonitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
Uptimepage
AGPL-3.0Hosted uptime monitoring with multi-region checks, eight monitor types, on-call rotations, escalation policies, and public status pages for SaaS teams and…
Grafana
AGPL-3.0Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive…
Nagios
GPL-2.0Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade…
Scanopy
AGPL-3.0Discovers your network via SNMP, LLDP, and ARP, then builds and maintains L2/L3 topology diagrams, host inventories, and service dependency maps automatically.
Zabbix
AGPL-3.0Monitors networks, servers, cloud services, IoT, and OT environments with no per-device licensing fees, available self-hosted or as a managed SaaS platform.
Apache SkyWalking
Apache-2.0Open source observability platform covering distributed tracing, metrics, logs, profiling, and LLM cost tracking across 10+ languages with eBPF support on…
Checkmk
GPL-2.0Monitor your entire IT infrastructure with 2,000+ plugins, automated discovery, and scalable architecture. Open source and enterprise solutions available.
Coroot
Apache-2.0Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.
Gigapipe
AGPL-3.0Unified platform for logs, metrics, traces and profiles with native compatibility for popular tools like OpenTelemetry, Prometheus, and Loki. No data silos…
HyperDX
MITOpen source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.
Icinga
GPL-3.0Monitor networks, servers, and cloud environments with flexible open-source solution. Custom checks, fast alerts, and complete infrastructure control.
Logfire
MITLogfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.
Maple
Open SourceObservability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI…
NetData
GPL-3.0Powerful, efficient, and user-friendly monitoring solution for servers, containers, and applications with instant insights and alerts.
OpenObserve
AGPL-3.0Monitor logs, metrics, and traces with an open-source observability platform. Achieve petabyte scale with 140x lower storage costs and high performance.
ProjectDiscovery
MITMonitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.
Prometheus
Apache-2.0Pull-based monitoring system with a multi-dimensional data model, PromQL query language, built-in alerting, and a time series database built for cloud native…
SigNoz
MITComprehensive monitoring and troubleshooting solution for microservices architectures, offering metrics, traces, and logs in a single pane.
Uptrace
AGPL-3.0Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.
VictoriaMetrics
Apache-2.0Time series database and monitoring platform compatible with Prometheus, handling billions of metrics with lower resource usage than most alternatives.
GreptimeDB
Apache-2.0Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
Elasticsearch
Open SourceElasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
Bugsink
Open SourceBugsink offers real-time error tracking with self-hosting capabilities, allowing easy installation and connection to any app using Sentry-compatible SDKs.
GlitchTip
MITSelf-hostable error tracking platform compatible with Sentry SDKs. Tracks exceptions, monitors performance, checks uptime, and collects logs without the…
Highlight
Apache-2.0Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.
OpenReplay
AGPL-3.0Open-source session replay and product analytics platform you can self-host for complete control over data security, privacy, and compliance.
Temps
Apache-2.0Self-hosted platform for small dev teams combining deployments, error tracking, analytics, session replay, uptime monitoring, and managed databases in one…
Logstash
Open SourceLogstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired…
Grafana Loki
AGPL-3.0Horizontally scalable, multi-tenant log aggregation system that stores and queries logs using label-based indexing instead of full-text indexing, keeping…
Vector
MPL-2.0Rust-built observability pipeline tool that collects, transforms, and routes logs and metrics across 47 sources and 62 sinks with no runtime dependencies.
Uptime Kuma
MITMonitors websites, APIs, and services with real-time alerts, a status page, and support for dozens of notification channels. Self-hosted and Docker-friendly.
Keep
MITOpen-source platform for centralizing alerts, automating responses, and enhancing incident management across your tech stack.
Sentry
Open SourceDetect, diagnose, and resolve software issues quickly with powerful error tracking, performance monitoring, and release management.
Tianji
Apache-2.0Self-hostable platform combining website analytics, uptime monitoring, server status, Docker tracking, status pages, and telemetry for indie developers and…
BugPin
AGPL-3.0Embeds a lightweight widget into web apps so users can capture screenshots, annotate issues, and submit reports with console logs and browser metadata included.
Wachd
Apache-2.0Receive alerts from Grafana, Datadog, and Prometheus with AI-generated root cause analysis. Self-hosted on Kubernetes, fully air-gapped capable, Apache 2.0…
Frequently Asked Questions: Open Source Monitoring & Observability
What are the best open source Monitoring & Observability tools in 2026?
The highest-ranked open-source software in Monitoring & Observability is Healthchecks with over 93,150 GitHub stars. Other leading tools include Cachet, Checkmate, EasyMonitor, Gatus. All are vetted for production self-hosting.
Can I self-host Monitoring & Observability open source tools on my own cloud?
Yes. Tools listed in this category support self-hosting via Docker, Docker Compose, Kubernetes, or Helm on AWS, Google Cloud, DigitalOcean, Hetzner, or bare metal with zero per-seat licensing fees.
How can early-stage startups get free cloud credits to host Monitoring & Observability tools?
Founders can claim up to $100,000 in AWS Activate, $350,000 in Google Cloud for Startups, and $1,000 in DigitalOcean credits via Startupbricks Perks (startupbricks.in/perks) to deploy self-hosted stacks at zero infrastructure cost.
What proprietary SaaS does open source Monitoring & Observability software replace?
Open-source tools in this category replace proprietary commercial platforms including BetterStack, UptimeRobot, Cronitor, Checkly, incident.io, Atlassian Statuspage, Instatus, OhDear!, Pulsetic, Site24x7. Switching gives your team 100% data custody, security control, and zero recurring seat costs.
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