Kortex gathers interviews, feedback threads, competitor pages and the AI chats where ideas took shape into a Gemini Notebook per feature, so specs can cite their evidence.
100,000+ users, rated 4.5 in 410 Chrome Web Store ratings.
Product managers use Kortex, a Chrome extension for Gemini Notebook (formerly NotebookLM), to collect interview notes, customer threads from Reddit and X, competitor pages and AI brainstorms in a notebook per feature or problem. They ask it for themes with citations, keep specs in synced Google Docs, and export briefs as PDF or Markdown.
Good specs cite their evidence. Kortex keeps the evidence in one place.
Customer feedback is spread over Reddit threads, X replies and interview notes.
Send Reddit posts with their top comments and X threads in one click, and add interview transcripts to the same notebook.
You can’t remember which customer said it.
Ask Gemini Notebook for the themes across every source. Each point cites the interview or thread it came from.
Competitor pricing and docs change, and you find out late.
Crawl a competitor’s site into a notebook, and with Kortex MCP put a weekly question about it on a schedule.
The spec in Google Docs and the notebook drift apart.
Send the spec from Google Docs and pull its latest version with Sync Google Docs.
Ideas from AI brainstorms vanish.
Send the ChatGPT or Claude chat to the feature’s notebook, with your prompts and the replies labelled.
From customer calls to specs to the review.
Themes from every interview and thread, each with its quote.
Their pricing and docs in a notebook, with a weekly question on the calendar.
A spec where every claim points at a customer.
Tagging and briefs done by asking.
Quoted word for word and linked to where they were posted. Reviewers don’t say what they do for a living, so we picked reviews about the features on this page.
“Kortex solves such a practical problem. NotebookLM is powerful, but managing sources across multiple projects can get messy fast. Having a centralized way to organize, import, and export those sources with a click is exactly the kind of workflow improvement that saves hours over time.”
Something we missed? Ask us.
Not directly. Kortex sends web pages you can open in Chrome, Google Docs, AI chats and posts from X, Reddit and LinkedIn. For other tools, export the data as a document and add it in Gemini Notebook, or have an AI assistant with access hand it to Kortex MCP.
Kortex doesn’t keep your chats or the contents of your sources; imports go to Gemini Notebook in your own Google account. Follow your company’s policy on customer data before adding interviews or support tickets.
Sharing happens in Gemini Notebook itself.
Gemini Notebook sets a cap on sources per notebook. Split big topics by segment or quarter, and search across every notebook to find things.
Yes. Cursor, Claude Code, Codex, ChatGPT and other MCP clients can connect; see connect your client.
Add Kortex to Chrome and send the next customer thread you read to a notebook.
100,000+ users, rated 4.5 on the Chrome Web Store.
