Prometheus is an open-source monitoring and time-series database for collecting metrics, querying with PromQL, and alerting on system and application health.

65.8k stars10.8k forksApache-2.0last commit Actively maintained
Cloud-native log management and observability platform that collects, stores, indexes and queries logs and events. Offers fast searches, dashboards, alerts and integrations for monitoring applications, infrastructure and security telemetry.
Prometheus is an open-source monitoring and time-series database for collecting metrics, querying with PromQL, and alerting on system and application health.

65.8k stars10.8k forksApache-2.0last commit Actively maintained
Grafana Loki is a Prometheus-inspired log aggregation system that indexes labels (not log contents) for cost-effective storage and fast querying, with Grafana integration.

28.8k stars4.1k forksAGPL-3.0last commit Actively maintained
Lightweight web-based real-time log viewer for Docker containers, with support for Docker Swarm and Kubernetes, plus search, split view, and optional authentication.

14.2k stars602 forksMITlast commit Actively maintained
OpenSearch is an Apache 2.0 open source distributed search and analytics engine for indexing, querying, and analyzing large-scale data with REST APIs.
13.6k stars2.9k forksApache-2.0last commit Actively maintained
Open-source cloud-native search engine for observability data on object storage with an Elasticsearch/OpenSearch-compatible API.
11.5k stars582 forksApache-2.0last commit Actively maintained
Parseable ingests, analyzes, and extracts insights from MELT telemetry data with predictive analytics and a unified SQL/NL querying interface.

2.4k stars171 forksAGPL-3.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 6 of 6 shipped a commit in the last six months. Licences in this list: Apache-2.0, AGPL-3.0, MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.