Cluing by Collabwriting Inc is transforming the personal knowledge management landscape with AI-powered tools that automatically organise and contextualise user-captured data from various sources, positioning itself as a vital resource for building a ‘second brain’ and supporting frontier AI models.
Cluing, the knowledge capture and organisation platform from Collabwriting Inc, is pushing into a fast-growing corner of the personal knowledge management market with a promise that is increasingly tailored to the age of AI: capture information once, let software sort it, then feed the result back into assistants and research tools. The service lets users save material from sources such as YouTube, Reddit, PDFs, LinkedIn, X and Kindle with a single click, before automatically turning those snippets into topics and clusters.
That approach is central to Cluing’s pitch. According to the company’s website, the platform is designed to create a curated knowledge base that can act as context for frontier AI models, while its top-tier plan includes unmetered Model Context Protocol requests, a sign that it wants captured notes to become a live data source for AI systems rather than a static archive.
Cluing offers a freemium structure that begins with a Hobbyist tier with unlimited snippets, rises to a Professional plan at $12 a month and tops out with a Superhuman tier at $120 a month. The mobile app, which is available for iPad, adds features including highlighting, comments on highlights, collaboration, AI research suggestions and the ability to import Kindle highlights. The Chrome extension extends the same workflow across web pages, PDFs, YouTube videos and other online sources.
The product is also notable for how it is being positioned after a recent rebrand. In January 2026, Collabwriting said it was becoming Cluing, recasting the service as a tool for building a “second brain” from scattered research and observations. Product Hunt reviews have been positive, with the platform currently carrying a 4.9 rating based on nine reviews. Cluing says it had about 18,000 users by mid-2026.
Even so, the category faces a familiar challenge. Capture is relatively easy; the harder part is turning a stream of saved material into something people actually return to. Cluing’s answer is to lean heavily on AI-driven organisation, a bet that may appeal to users who find manual sorting tedious and to teams looking for shared research workflows. From a wider personal knowledge management perspective, it is a product worth watching, especially as more tools move towards treating user-captured knowledge as a first-class input for AI assistants.
Disclaimer: This content is intended for informational purposes only. Readers are advised to exercise their own judgement, conduct due diligence, or consult a qualified expert before acting on any information provided.
