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2 tools

Great Expectations project (open-source stewardship by Fivetran) · Data quality & validation

Python data-quality framework that declares Expectations about datasets, validates them against pandas, Spark or SQL sources and produces Data Docs

Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026

Union.ai (Pandera project, created by Niels Bantilan) · Data quality & validation

Lightweight Python library for declaring and validating DataFrame schemas for pandas, Polars, PySpark and other backends, with type-hint style models

MITOpen sourceFreeLocalNov 2, 2026

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