Apache Spark
Apache Software Foundation · Analytical engines & OLAP
Distributed data processing engine with DataFrame and SQL APIs in Python, Scala, Java and R, plus structured streaming and MLlib
Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026
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Apache Superset
Apache Software Foundation · BI & dashboards
Apache-licensed BI web application with SQL Lab, a no-code chart builder, dashboards and connectors to any SQLAlchemy-compatible database
Apache-2.0Open sourceFreeSelf-hostedNov 2, 2026
ClickHouse
ClickHouse, Inc. · Analytical engines & OLAP
Open-source columnar OLAP database server for fast aggregations over billions of rows, with MergeTree storage, SQL and a managed ClickHouse Cloud
Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026
pgvector
Andrew Kane (pgvector project) · Vector databases
PostgreSQL extension adding vector types, distance operators and HNSW/IVFFlat indexes for similarity search inside the database
PostgreSQLOpen sourceFreeSelf-hostedNov 2, 2026
PostgreSQL
PostgreSQL Global Development Group · Relational databases
Open-source object-relational database server with a large extension ecosystem (PostGIS, pgvector, TimescaleDB) and broad SQL coverage
PostgreSQLOpen sourceFreeLocalSelf-hostedBroken
Trino
Trino Software Foundation · Analytical engines & OLAP
Distributed SQL query engine that federates queries across data lakes, warehouses and databases through connectors, formerly PrestoSQL
Apache-2.0Open sourceFreeSelf-hostedNov 2, 2026
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