Loki is an open-source log aggregation system developed by Grafana Labs, inspired by Prometheus, to address the challenges of scalable logging for cloud-native environments. Designed to complement existing observability tools, Loki focuses on simplicity and cost-efficiency, allowing users to seamlessly switch between metrics and logs by leveraging metadata collected from Prometheus. The architecture involves components like promtail for log collection, distributors for data batching and compression, and ingesters for chunk building, with the system supporting horizontal scalability through stateless distributors and queriers. While still in its alpha phase, Loki aims to provide an affordable and easily operable logging solution, inviting community feedback to refine its capabilities for future production releases.