Lakehouse Table Formats in 2026: Iceberg, Delta Lake, Hudi, Paimon, and DuckLake, How They Work, Where They Stand, and Where They're Going

This article provides a comprehensive breakdown of the five major lakehouse table formats as of 2026: Apache Iceberg, Delta Lake, Apache Hudi, Apache Paimon, and DuckLake. It explains the first principles of what a table format does, then dives into each format's mechanics, current state, releases, ecosystem, governance, and roadmap. The author discusses the industry convergence on Iceberg as an interoperability standard while highlighting each format's unique design center and workloads where it excels. Topics include row-level change handling, convergence and interop layers, ecosystem mapping, and a decision framework for choosing a format. The article also covers governance and community health considerations, a roadmap watchlist, and common questions. Written by Alex Merced of Dremio, it aims to provide an honest, fair comparison across all five formats.