Licensing

HumemDB license

HumemDB's own source code is licensed under MIT.

• Repository license file: LICENSE
• Package metadata: pyproject.toml

That MIT grant applies to HumemDB's code and documentation in this repository. It does not automatically relicense third-party dependencies.

Runtime libraries HumemDB relies on

The current runtime depends on a small set of explicit Python libraries and embedded engines:

• sqlite3 from the Python standard library for the canonical local write path
• duckdb for analytical reads
• numpy for the exact in-memory vector search baseline
• sqlglot[c] for the SQL translation layer
• lancedb for benchmark work and future indexed ANN paths
• threadpoolctl for thread-pool coordination

HumemDB intentionally presents those libraries as part of the implementation story instead of pretending everything comes from one hidden backend.

Third-party licenses

Third-party dependencies keep their own licenses and distribution terms.

• Installing HumemDB may download third-party wheels or source distributions.
• Some of those dependencies may include native code or platform-specific wheels.
• Those components remain under their upstream licenses.

For the concrete dependency set used by this project, see:

• pyproject.toml
• uv.lock

If you need a formal license review for a deployment, review the resolved dependency set from the lockfile rather than only the top-level MIT license.