Open source alerting projects
Every project in the registry tagged alerting, ranked by real GitHub adoption.
Real-time monitoring for systems and applications
Unified observability for metrics, logs, traces, and more
Open source metrics collection, storage, and alerting
Unify, automate, and elevate your monitoring workflow
Advanced automated status page for real-time monitoring
Build your own AI SRE agents. The open source toolkit for the AI era.
Full-stack observability without the enterprise price tag
Status page and uptime monitoring for growing teams
Full-stack observability without code changes
An AI-powered next-generation open source real-time observability system.
Enterprise monitoring for networks, apps, and infrastructure
Better Prometheus alerts for Kubernetes - smart grouping, AI enrichment, and automatic remediation
Kibana Alert & Report App for Elasticsearch
Self-hosted monitoring for Docker, Kubernetes and uptime. Single Go binary, no agent config, live alerts. Drop a container, your stack is monitored.
Related tags
Frequently asked questions
How many open source alerting projects are there?
This registry tracks 14 projects tagged alerting, with 304,626 GitHub stars between them. The most-adopted is NetData at 80,561 stars.
Are these alerting projects free to use?
Yes — 13 of the 14 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which alerting project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these alerting projects still maintained?
13 of the 14 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.