Data Diff Python Packages

veridelta

Compare two datasets on their primary keys under rules you declare, on a laptop, in CI, or inside a warehouse.

proofframe

Ruff for data — Arrow-native data quality in Rust + Python: contracts, canonical fingerprints, keyed diffs, PII & leakage scans, and Ed25519 proof receipts

datadiffer

Diff two tables and see what changed, and which slice of your data it's concentrated in.

csv-cdc

A high-performance Change Data Capture (CDC) tool for comparing CSV files and detecting differences. Built with Python and optimized for speed using Polars, NumPy, and xxHash.

reconlify-cli

Local-first CLI for semantic data reconciliation with YAML rules and JSON reports.

uniqdiff

Stable comparison engine for datasets, files, streams, and connector-backed sources.