OpenObserve
Search logs, metrics, and traces in one observability platform.
OpenObserve collects application logs, metrics, and distributed traces for querying, dashboards, and alerting. It supports SQL and PromQL and can be self-hosted or used through its hosted cloud service.
The server is implemented in Rust; the web interface is a separate frontend. The open-source edition uses the AGPL-3.0 license, while enterprise functionality is commercially licensed.