Datafold vs Zeffy

About

Datafold is a data observability and data quality testing platform that helps data engineering teams automatically detect data quality regressions, schema changes, and anomalies in their data pipelines before they impact downstream analytics and business decisions. Founded in 2020 by Gleb Mezhanskiy and Alexey Astafyev and headquartered in San Francisco, Datafold was built by data engineers who experienced the pain of data quality issues at scale and raised approximately $20 million to build a dedicated solution.\n\nDatafold's core product is Column-level Lineage and Datadiff — automatically comparing data between pipeline versions or time periods to surface when a code change causes unexpected shifts in data distributions, row counts, or metric values. This "data diff" capability enables data engineers to review the actual impact of their dbt or SQL pipeline changes on downstream data before merging, similar to how code review shows code diffs. The platform integrates with dbt (the dominant SQL transformation tool), Airflow, and major cloud data warehouses (Snowflake, BigQuery, Redshift).\n\nIn 2025, Datafold competes in the data observability market against Monte Carlo (enterprise data observability), Great Expectations (open-source data testing), Soda (data quality), and dbt's built-in testing capabilities. The data quality space has matured as organizations recognize that bad data costs more than bad code — pipeline failures that corrupt analytics silently are particularly damaging. Datafold's differentiation is its automated data diffing for pipeline change validation, which is more proactive than anomaly detection-based tools. The 2025 strategy focuses on the dbt ecosystem where Datafold has strong traction, expanding CI/CD pipeline integrations, and building AI-powered root cause analysis for data quality issues.