Open-source alerting software
365 open-source libraries, tools and applications tagged alerting, ranked by how closely alerting is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
365 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| louislam/uptime-kuma Uptime Kuma is a self-hosted uptime monitoring application with a reactive single-page web UI. It monitors HTTP(s), TCP, DNS, Docker contai… | 100 | 92687 | active |
| Netdata Netdata is a real‑time performance monitoring and troubleshooting tool that collects, visualizes, and alerts on metrics from servers, conta… | 99 | 80991 | active |
| Netdata Netdata is an open-source, real-time infrastructure monitoring and observability platform with a lightweight agent that collects per-second… | 99 | 80991 | stable |
| Grafana Grafana is an open-source observability and data visualization platform for querying, visualizing, and alerting on metrics, logs, and trace… | 95 | 77341 | stable |
| prometheus/prometheus Prometheus is an open‑source systems monitoring and alerting toolkit that stores metrics as time‑series data. It provides a powerful query … | 96 | 66213 | active |
| metabase/metabase Metabase is an open‑source business intelligence platform that lets users explore data, build visual dashboards and run queries without dee… | 95 | 49624 | active |
| changedetection.io A self-hosted web application for monitoring websites and detecting content changes, with alerts via Discord, Slack, Telegram, email, webho… | 94 | 34909 | active |
| SigNoz Observability Platform SigNoz is an open-source, OpenTelemetry-native observability platform that unifies logs, metrics, traces, alerts, and dashboards in a singl… | 95 | 32332 | active |
| henrygd/beszel Beszel is a lightweight, self‑hosted server monitoring platform with a web dashboard. It collects system and container metrics, stores hist… | 91 | 26224 | active |
| Obtainium Obtainium is an Android app that installs and updates applications directly from their release pages on sources like GitHub, GitLab, and F-… | 95 | 20509 | active |
| dianping/cat CAT is a real-time application monitoring (APM) platform developed in Java at Meituan-Dianping, providing performance metrics, health statu… | 23 | 18938 | active |
| Wazuh Wazuh is a free, open source security platform that unifies XDR and SIEM capabilities for threat prevention, detection, and response across… | 98 | 17197 | stable |
| Upptime Upptime is an open-source uptime monitor and status page powered entirely by GitHub Actions, Issues, and Pages, requiring no external serve… | 68 | 17182 | stable |
| Pinpoint Pinpoint is an open-source Application Performance Management (APM) tool for large-scale distributed systems, inspired by Google's Dapper p… | 90 | 13868 | active |
| ccfos/nightingale Nightingale is an open-source monitoring and alerting platform focused on the alerting engine, alarm processing, and distribution, connecti… | 96 | 13325 | active |
| keephq/keep Keep is an open-source AIOps and alert management platform that consolidates alerts from 90+ monitoring tools into a single pane of glass w… | 92 | 12417 | active |
| TwiN/gatus Gatus is a self-hosted, developer-oriented health dashboard and status page that monitors services via HTTP, ICMP, TCP, and DNS checks with… | 97 | 12215 | stable |
| calesthio/Crucix Crucix is a self-hosted OSINT intelligence terminal that aggregates 27 open-source data feeds (satellite fire detection, flight tracking, r… | 49 | 12090 | active |
| Checkmate Checkmate is an open-source, self-hosted infrastructure and uptime monitoring platform by Bluewave Labs. It tracks server hardware, uptime,… | 91 | 10946 | active |
| healthchecks/healthchecks Healthchecks is an open-source cron job and background task monitoring service built with Python and Django. It listens for HTTP or email p… | 93 | 10424 | stable |
| Nezha Monitoring Nezha Monitoring is a self-hosted, lightweight server and website monitoring and O&M platform consisting of a central dashboard and lightwe… | 92 | 10329 | active |
| hyperdxio/hyperdx HyperDX is an open-source observability platform that unifies session replays, logs, metrics, traces, and errors in a single interface, bui… | 92 | 9949 | active |
| Falco Falco is a CNCF-graduated cloud native runtime security tool for Linux that monitors kernel events (syscalls) via eBPF or kernel modules an… | 94 | 9478 | stable |
| openstatus Openstatus is an open-source status page and uptime monitoring platform that monitors websites, APIs, and services from 28 global regions a… | 73 | 9143 | active |
| databasus/databasus Databasus is a free, open-source, self-hosted backup tool for PostgreSQL (plus MySQL, MariaDB, and MongoDB) with Point-in-Time Recovery via… | 82 | 8847 | active |
| prometheus/alertmanager Alertmanager is the Prometheus project's alert handling component, written in Go. It receives alerts from Prometheus servers or other clien… | 92 | 8627 | stable |
| AnalogJ/scrutiny Scrutiny is a self-hosted web dashboard for hard drive S.M.A.R.T monitoring that integrates with the smartd daemon. It tracks historical S.… | 98 | 8286 | active |
| Graylog Graylog is a free and open log management platform for collecting, storing, searching, and analyzing log data from across IT environments, … | 77 | 8154 | stable |
| Coroot Coroot is an open-source, self-hosted observability and APM platform that uses eBPF to collect metrics, logs, traces, and continuous profil… | 95 | 7966 | active |
| OneUptime OneUptime is a complete open-source monitoring and observability platform combining uptime monitoring, incident management, on-call schedul… | 96 | 7752 | active |
| apache/hertzbeat Apache HertzBeat is an AI-powered, agentless open-source real-time observability system that unifies metrics collection, log aggregation, a… | 89 | 7423 | active |
| netalertx/NetAlertX NetAlertX is a self-hosted network visibility and asset intelligence platform that performs continuous device discovery and monitoring acro… | 98 | 7279 | active |
| didi/KnowStreaming Know Streaming is a cloud-native Kafka management and control platform built from years of operational experience at Didi. It provides zero… | 81 | 7174 | active |
| rcourtman/Pulse Pulse is a self-hosted infrastructure monitoring application for Proxmox, Docker, Kubernetes, TrueNAS, and vSphere, combining live state, h… | 84 | 6878 | active |
| Tautulli Tautulli is a Python-based self-hosted web application for monitoring, tracking, and analyzing activity on a Plex Media Server. It provides… | 95 | 6613 | active |
| Zabbix Zabbix is an enterprise-class open-source distributed monitoring and observability platform for tracking the performance and availability o… | 76 | 6435 | stable |
| Azure/Azure-Sentinel The official community repository for Microsoft Sentinel, a cloud-native SIEM, containing out-of-the-box detections, hunting queries, workb… | 77 | 6189 | active |
| opengoofy/hippo4j Hippo4j is a Java framework for managing, observing, and dynamically tuning thread pools at runtime without code changes. It provides a con… | 51 | 6001 | active |
| prometheus/blackbox_exporter The Blackbox exporter is a Prometheus exporter that probes endpoints over HTTP, HTTPS, DNS, TCP, ICMP, and gRPC and exposes probe success a… | 73 | 5883 | active |
| fluxcd/flagger Flagger is a progressive delivery Kubernetes operator that automates canary releases, A/B testing, and Blue/Green deployments by gradually … | 87 | 5418 | stable |
| jef/streetmerchant streetmerchant is a Node.js application that continuously checks retail websites for product stock availability, with optional add-to-cart … | 60 | 5402 | active |
| gitify-app/gitify Gitify is a free, open-source cross-platform desktop application that shows Git forge notifications (GitHub, GitHub Enterprise, GitLab, Git… | 99 | 5374 | active |
| a597873885/webfunny_monitor Webfunny is a self-hostable full-stack observability platform combining frontend monitoring, APM backend monitoring, and business event ana… | 66 | 5302 | active |
| FailproofAI/failproofai Failproof AI is an open-source observability and enforcement layer for AI agent harnesses like Claude Code, Codex, Hermes, and OpenClaw, ca… | 82 | 5268 | active |
| grafana/mimir Grafana Mimir is an open source, horizontally scalable, highly available, multi-tenant time series database providing long-term storage for… | 99 | 5254 | active |
| tianshiyeben/wgcloud WGCLOUD is a lightweight, distributed IT operations monitoring platform built on SpringBoot with a Go-based agent, designed for fast deploy… | 92 | 5187 | active |
| rajnandan1/kener Kener is an open-source, self-hosted status page and uptime monitoring application built with SvelteKit. It tracks multiple service types (… | 86 | 5178 | active |
| cilium/tetragon Tetragon is an eBPF-based security observability and runtime enforcement tool from the Cilium project. It monitors process execution, sysca… | 88 | 5067 | active |
| ossec/ossec-hids OSSEC is an open-source host-based intrusion detection system (HIDS) that combines log analysis, file integrity monitoring, rootkit detecti… | 94 | 5062 | stable |
| LibreNMS LibreNMS is a fully featured, community-driven GPL-licensed network monitoring system written in PHP with MySQL and SNMP. It auto-discovers… | 100 | 4966 | active |
| crazy-max/diun Diun (Docker Image Update Notifier) is a Go tool that watches container images on Docker registries and notifies you when a tracked tag or … | 81 | 4963 | active |
| LinuxGSM LinuxGSM is a command-line tool written in Bash for quickly deploying and managing Linux dedicated game servers. It supports 100+ game serv… | 99 | 4912 | active |
| dromara/dynamic-tp DynamicTp is a lightweight Java framework for managing dynamically configurable, monitored thread pools based on configuration centers like… | 70 | 4812 | active |
| latitude-dev/latitude-llm Latitude is an open-source, MIT-licensed AI agent observability and monitoring platform that captures production agent traffic as traces an… | 87 | 4728 | active |
| cppla/ServerStatus ServerStatus is a lightweight self-hosted server monitoring probe and status dashboard written in Go, with a Python agent for clients. It t… | 92 | 4687 | active |
| hacklcx/HFish HFish is a free, enterprise-grade honeypot platform for deception-based defense, threat detection, and attacker tracing. It deploys decoy s… | 61 | 4552 | active |
| Tactical RMM Tactical RMM is a self-hosted remote monitoring and management tool built with Django, Vue, and a Go agent, integrating MeshCentral for rem… | 91 | 4496 | active |
| AspNetCore HealthChecks A collection of ASP.NET Core health check packages for widely used services and platforms, plus a HealthChecks UI with storage providers, w… | 59 | 4374 | active |
| uptrace/uptrace Uptrace is an open-source Application Performance Monitoring (APM) platform that collects and visualizes OpenTelemetry traces, metrics, and… | 92 | 4297 | active |
| errbit/errbit Errbit is an open-source, self-hosted error catcher that collects and manages error notifications from other applications. It is Airbrake A… | 97 | 4270 | active |
| Riemann Riemann is a network event stream processing system written in Clojure that aggregates events from servers and applications. It provides a … | 53 | 4265 | stable |
| Ombi-app/Ombi Ombi is a self-hosted web application that lets users of Plex, Emby, or Jellyfin media servers request movies and TV shows. It syncs with t… | 81 | 4103 | active |
| getwud/wud WUD (What's up Docker?) is a self-hosted service that continuously monitors Docker containers, detects newer image versions across many reg… | 99 | 4020 | active |
| linkedin/Burrow Burrow is a monitoring service for Apache Kafka that checks consumer lag without requiring static thresholds, evaluating consumer groups ov… | 83 | 3964 | active |
| lyc8503/UptimeFlare UptimeFlare is a free, serverless uptime monitoring and status page solution built on Cloudflare Workers with a D1 database backend. It sup… | 73 | 3887 | active |
| DataLinkDC/dinky Dinky is an open-source, one-stop real-time computing platform built around Apache Flink, providing an IDE for FlinkSQL development, online… | 74 | 3769 | active |
| pavel-odintsov/fastnetmon FastNetMon Community Edition is a high-performance DDoS detection sensor that analyzes traffic from NetFlow, IPFIX, sFlow, AF_PACKET, and o… | 78 | 3706 | active |
| sqshq/sampler Sampler is a command-line tool that periodically executes shell commands and visualizes their output as terminal dashboards with charts, ga… | 23 | 14808 | maintenance |
| kubernetes/node-problem-detector A Kubernetes daemon that runs on each node to detect node problems such as hardware failures, kernel deadlocks, and container runtime issue… | 100 | 3477 | active |
| sourcegraph/checkup Checkup is a distributed, lock-free, self-hosted health check and status page tool written in Go, offering both a CLI and an idiomatic Go l… | 66 | 3459 | active |
| feiyu563/PrometheusAlert PrometheusAlert is an open-source operations alert center and message forwarding system that receives webhook alerts from monitoring system… | 78 | 3341 | active |
| operacle/checkcle CheckCle is a self-hosted, open-source monitoring platform for real-time uptime and infrastructure monitoring of servers, applications, and… | 59 | 3275 | active |
| OpenOcta OpenOcta is an open-source desktop AIOps agent for Windows and macOS that lets ops engineers assign IT operations work in natural language.… | 79 | 3230 | active |
| smartloli/EFAK EFAK (Eagle For Apache Kafka) is an open-source, AI-enhanced monitoring and management platform for Kafka clusters, built on Spring Boot 3.… | 75 | 3182 | active |
| thp/urlwatch urlwatch is a Python CLI tool that monitors webpages for changes and notifies you via e-mail, terminal, or third-party services like Telegr… | 70 | 3142 | active |
| Robusta Robusta is an open-source Prometheus alert enrichment engine for Kubernetes that adds smart grouping, alert enrichment with pod logs, advan… | 96 | 3101 | active |
| msgbyte/tianji Tianji is a self-hosted all-in-one insight hub combining website analytics, uptime monitoring, and server status reporting in a single ligh… | 88 | 3099 | active |
| spacecowboy/Feeder Feeder is an open-source RSS/Atom/JSON Feed reader app for Android, built with Kotlin and Jetpack Compose. It runs entirely locally with no… | 97 | 3053 | active |
| thinkst/opencanary OpenCanary is a modular, multi-protocol network honeypot daemon written in Python, designed to detect attackers after they breach internal … | 88 | 3050 | active |
| cruise-control-for-kafka/cruise-control Cruise Control is a Java-based service that automates dynamic workload rebalancing and self-healing for Apache Kafka clusters. It tracks br… | 91 | 3046 | active |
| baidu/openrasp OpenRASP is Baidu's open-source Runtime Application Self-Protection (RASP) solution that embeds a protection engine directly into the appli… | 39 | 2987 | stable |
| favonia/cloudflare-ddns A small, feature-rich, and robust Cloudflare DDNS updater written in Go, distributed as a lightweight Docker image. It detects the machine'… | 93 | 2933 | active |
| OpenCVE OpenCVE is a self-hostable Vulnerability Intelligence Platform that aggregates CVE data from sources like MITRE, NVD, CISA KEV, Vulnrichmen… | 90 | 2841 | active |
| target/goalert GoAlert is an open-source on-call scheduling and alert escalation application that automatically notifies the right person via SMS, voice c… | 86 | 2838 | active |
| nightscout/cgm-remote-monitor Nightscout is a self-hosted web application that displays continuous glucose monitor (CGM) data in real time for patients and their caregiv… | 87 | 2826 | active |
| pucherot/Pi.Alert Pi.Alert is a self-hosted WIFI/LAN intruder detector that scans the local network for connected devices using arp-scan, Pi-hole, and dnsmas… | 23 | 2768 | active |
| bloomberg/goldpinger Goldpinger is a Kubernetes debugging tool that runs as a DaemonSet and makes calls between its instances to test and visualize network conn… | 98 | 2741 | active |
| connorgallopo/Tracearr Tracearr is a self-hosted, open-source monitoring platform for Plex, Jellyfin, and Emby media servers, unifying real-time session tracking,… | 80 | 2740 | active |
| Elkeid Elkeid is an open-source cloud workload protection platform from ByteDance that provides host intrusion detection (HIDS), runtime applicati… | 67 | 2683 | active |
| prymitive/karma Karma is a web-based alert dashboard for Prometheus Alertmanager that aggregates and deduplicates alerts from multiple Alertmanager instanc… | 97 | 2681 | active |
| outflanknl/RedELK RedELK is a self-hosted SIEM built on the Elastic stack (Elasticsearch, Logstash, Kibana) tailored for red team operations. It aggregates a… | 66 | 2671 | active |
| KubeArmor KubeArmor is a cloud-native runtime security enforcement system that restricts process execution, file access, and networking behavior of p… | 100 | 2631 | active |
| rabbitstack/fibratus Fibratus is a Windows security sensor that performs realtime threat detection by analyzing kernel and system telemetry (including ETW event… | 87 | 2552 | active |
| slok/sloth Sloth is a Go CLI and Kubernetes operator that generates Prometheus SLO recording rules and multi-window multi-burn alert rules from a simp… | 78 | 2550 | active |
| Jxck-S/plane-notify A Python application that monitors ADS-B flight data from OpenSky or ADSBExchange and sends notifications when configured aircraft take off… | 76 | 2549 | active |
| huilang-me/CF-Server-Monitor A free multi-server monitoring probe system built on Cloudflare Workers, D1, and Durable Objects, with a real-time dashboard, offline alert… | 59 | 2548 | active |
| Alerta Alerta is a monitoring system that consolidates and de-duplicates alerts from multiple monitoring sources into a single view, combining a J… | 69 | 2530 | active |
| dromara/domain-admin Domain Admin is a self-hosted web platform for monitoring domain and SSL certificate expiration, built with Python (Flask) and Vue3. It als… | 83 | 2453 | active |
| Elementary Elementary OSS is an open-source CLI for dbt-native data observability that reads warehouse metadata, dbt artifacts, and test results to ge… | 99 | 2421 | active |
| beenuar/AiSOC AiSOC is an open-source, self-hostable AI-powered Security Operations Center that fuses alerts, performs agent-assisted triage, purple-team… | 82 | 2400 | active |
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