A free UI visual tool for building custom language-based models using LangchainJS.Flowise is an open source UI visual tool that allows users to build their own customized language-based models (LLMs) using LangchainJS written in Node Typescript/Javascript. It is free for both commercial and personal usage, and can be set up with a few simple commands. It also supports Docker, and users can get in touch with the Flowise team through Discord, Twitter, or email.