C ClickHouse, Inc. · Analytical engines & OLAP
In-depth entry Open-source columnar OLAP database server for fast aggregations over billions of rows, with MergeTree storage, SQL and a managed ClickHouse Cloud
Apache-2.0 Open source Free Local Self-hosted Nov 2, 2026D DuckDB Foundation / DuckDB Labs · Analytical engines & OLAP
In-depth entry In-process analytical SQL database that queries Parquet, CSV and Arrow data directly from Python, R, Node or the CLI
MIT Open source Free Local Self-hosted Nov 2, 2026S Supabase Inc. · Relational databases
Open-source backend platform built around a dedicated PostgreSQL database with auto-generated APIs, authentication, file storage, realtime subscriptions and edge functions
Apache-2.0 Open source Freemium Self-hosted Nov 2, 2026