Lex

Lex is an AI-augmented word processor for web-based writing and collaboration. It functions as a minimalist document editor integrated with selectable AI models, which can be accessed programmatically via a simple Developer API. The system addresses draft refinement and idea generation with features like "AI Feedback" for critiques, "Versions" for saving iterations, and direct integration with the Kit (formerly ConvertKit) newsletter platform. Users can also build and save custom instructions using the "Prompts" and "Prompt Builder" functions to streamline specific writing tasks, while "Knowledge Bases" give the AI persistent background context. The platform is built for marketing teams and content creators managing recurring campaigns. Its daily application involves using dedicated templates to produce long-form articles or social copy while maintaining a consistent brand voice via the "Style Guides" feature. Writers utilize the built-in readability scoring and real-time keyword density optimization tools to refine content before sharing collaborative links for team review. While it accelerates drafting, generated technical arguments and numerical claims require manual human verification for factual accuracy before publishing.