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OctoSQL vs DuckDB: catalog facts
OctoSQL	DuckDB
Free Free and open source under the Mozilla Public License 2.0.	Free Free and open source under the MIT licence.
Windows, Command line	Windows, macOS, Linux, Command line
Joins data across different databases and file formats in one query Uses standard SQL	Queries CSV and Parquet files directly with no loading step Embeds into Python, R and the shell with a single dependency
No commits since May 2024 Command line only	Single-process by design; it is not a shared multi-user database Concurrent writers are not supported
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.