DuckDB vs Polars

Side-by-side comparison of DuckDB and Polars to help you choose the right tool.

Feature	DuckDB	Polars
Pricing	Free (open source)	Free (open source)
Rating	⭐ 4.8/5	⭐ 4.7/5
Categories	data-warehouses, data-science	data-science
In-process execution	✅	❌
Columnar storage	✅	❌
Parquet/CSV/JSON support	✅	❌
SQL compliant	✅	❌
Zero dependencies	✅	❌
Python/R/Java bindings	✅	❌
Lazy evaluation	❌	✅
Multi-threaded	❌	✅
Arrow-based	❌	✅
Expression system	❌	✅
Streaming	❌	✅
SQL interface	❌	✅

In-process analytical database

Try DuckDB →

Lightning-fast DataFrame library

Try Polars →