Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.
Tracetest allows easy creation of end-to-end tests via a simple user interface. It leverages your current investment in OpenTelemetry based tracing to make deep integration and E2E testing simple.
Grafana Mimir lets you scale to 1 billion metrics and beyond, with high availability, multi-tenancy, durable storage, and blazing fast query performance over long periods of time.