Pentaho Data Integration (PDI, also known as Kettle) is a visual ETL platform for designing data pipelines without code. You drag-and-drop transformations, connect data sources to targets, and orchestrate complex workflows. It's used in enterprises for data warehouse loading, data migration, and real-time data streaming. Pentaho is part of Hitachi Vantara's product suite. The core engine (Kettle) is open-source, but the enterprise features (Pentaho Server for scheduling, security, monitoring) are commercial. It competes with Talend, Informatica, and increasingly with cloud-native ETL (dbt, Dataflow, Airflow).