MonetDB
(MonetDB)
toolcolumn-store SQL engine for analytics and hybrid HTAP, full ACID, window functions, UDF hooks; open source
TiDB Self-Managed
(docs.pingcap.com)
referenceMySQL-compatible HTAP cluster: TiUP and Kubernetes deployment, TiFlash, migration, tuning; Apache-2.0
Home - ClickHouse Documentation
(ClickHouse Documentation)
referencecolumn-store OLAP engine for analytics and warehousing, Apache-2.0; docs index and integration catalogue
An in-process SQL OLAP database management system
(DuckDB)
toolin-process OLAP engine querying CSV and Parquet in place and pandas frames directly, MIT licensed
Low-latency time-series database on open formats | QuestDB
(QuestDB)
toolSQL-queried time-series store aimed at high-rate ingest; Apache-2.0 core, commercial editions
Apache Doris: Open Source, Real-Time Analytics and Search Database for the AI Era - Apache Doris
(doris.apache.org)
toolMPP column store for sub-second SQL over logs, metrics, JSON and vectors; Apache-licensed