DuckDB
DuckDB is an in-process SQL OLAP database management system.
Best DuckDB Alternatives & Competitors in 2025
The best DuckDB alternatives based on verified products, community votes, reviews and other factors.
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Open-Source Alternatives.
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ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
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Fast column-oriented distributed data store
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The most intuitive platform to manage projects and teamwork
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Column-store database
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OctoSQL is a query tool that allows you to join, analyse and transform data from multiple databases and file formats using SQL. - cube2222/octosql
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Apache Arrow is a cross-language development platform for in-memory data.
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A Streaming Database for Real-Time Applications
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Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
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Tool for SQL and databases
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Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
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OLAP Engine for Big Data
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The world's most popular open source database
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DBeaver - Universal Database Manager and SQL Client.
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MongoDB (from "humongous") is a scalable, high-performance NoSQL database.