DeltaReconcile

DeltaReconcile is a web app (with optional CLI agent) that continuously compares outputs between two data processing paths—old vs new pipelines, batch vs streaming, warehouse vs lakehouse—and flags meaningful differences fast. Instead of generic “data quality” checks, it focuses on reconciliation: row counts, aggregates, distribution shifts, key-level mismatches, and late-arriving data effects. Teams define a reconciliation spec (keys, metrics, tolerances, time windows), then the app runs scheduled comparisons, stores evidence, and produces a clear diff report with links to the exact partitions/queries that diverged. It’s built for migrations, refactors, vendor swaps, and backfills where silent errors are common and expensive. It won’t magically fix broken modeling; it reduces the time to detect and localize discrepancies so engineers can ship changes with confidence.