Scalable datastore for metrics, events, and real-time analytics

Anki's shared backend and web components, and the Qt frontend

Cloud-native search engine for observability. An open-source alternative to Datadog, Elasticsearch, Loki, and Tempo.

Apache DataFusion SQL Query Engine

An open-source, cloud-native, unified time series database for metrics, logs and events, supporting SQL/PromQL/Streaming. Available on GreptimeCloud.

Apache HoraeDB (incubating) is a high-performance, distributed, cloud native time-series database.