Show HN: Flowfile – Open-source visual ETL that round-trips to Python (Polars)

Category: devtools

Tags: etl, polars, visual-programming, data-pipeline, python, delta-lake

Score: 7.5/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 7)

Flowfile is an open-source visual ETL tool whose flows compile to Polars, with a bidirectional Python API that round-trips between canvas and code. It bundles a Delta-backed catalog, SQL editor, scheduler, sandboxed Python kernels, and an AI assistant, making it a compelling local or team-scale alternative to heavier ETL platforms.

Target audience: data engineers, analytics engineers, backend developers

Repository: https://flowfile.io/ · Python · MIT · 400 stars

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