

Kortex is an extension designed to enhance NotebookLM by transforming it into a comprehensive knowledge hub. It allows users to seamlessly save AI conversations, web research, and social media content into a unified, searchable repository. Notable features include the ability to highlight, annotate, and edit sources, as well as organize information using nested folders and tags. Kortex aims to address common limitations of NotebookLM, such as siloed knowledge and the inability to manage sources effectively.
The numbers show a compact, high-margin operation: $26,267 last month, a recurring base of $3,041, and an unusually high 98% margin. With 10,770 monthly visitors, the product is finding an audience and turning that attention into revenue at a level that supports ongoing operations.
Key questions for a buyer or investor are about durability and revenue mix. The gap between one-month revenue and the recurring run-rate suggests there may be meaningful non-recurring or lumpy income — worth clarifying — and the recent +91% spike should be tested for sustainability. There’s also an operational dependency implicit in the product description: Kortex augments Google NotebookLM, so roadmap or platform changes at Google are a material risk to model and product continuity. Listed for sale status makes this an immediate acquisition opportunity but also raises questions on why the founder(s) are exiting now.
A judgment from project data — not a user review.