WhatTheDuck is described as 'Open-source web application built on DuckDB. It allows users to upload CSV files, store them in tables, and perform SQL queries on the data' and is a database management tool in the development category. There are more than 25 alternatives to WhatTheDuck for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best WhatTheDuck alternative is DBeaver, which is both free and Open Source. Other great apps like WhatTheDuck are HeidiSQL, phpMyAdmin, DbGate and Outerbase Studio.