Related Products
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About
Kortex is a browser extension that turns Google’s NotebookLM into an interconnected, dynamic knowledge base, helping users stop losing ideas by capturing and organizing valuable insights that would otherwise remain trapped in chat histories and scattered tabs. It lets you archive full AI conversations from services like ChatGPT, Gemini, Claude, and Perplexity with one click and save any highlighted text on a webpage as a perfectly cited source directly to NotebookLM. Kortex also offers effortless exporting of sources, chats, or curated notes into Markdown, JSON, or a downloadable .zip file, and integrates with Google Docs so you can send documents to NotebookLM with a single click. For notebook management, Kortex enables bulk deletion of multiple notebooks from the dashboard at once. Designed to help users find anything they’ve saved and never lose an insight again, Kortex installs in seconds and supports thousands of users building their own “second brain”.
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About
Second Brain is an AI-powered research, planning, and productivity platform that lets you build an “AI visual board”—a knowledge base where you can upload documents, articles, videos, audio, GitHub repos, websites, ChatGPT responses, and more, then interact conversationally with all your content. Backed by GPT‑4.5, Claude, Grok 3, DeepSeek R1, and similar top-tier AI models, Second Brain enables instant summarization, searchable Q&A, multilingual interaction (e.g., chat in English with Spanish content), and automated transformation of text into natural, undetectable human‑sounding copy. You can save AI chat responses as richly formatted, shareable pages, then continue building on them with headings, to‑do lists, images, code blocks, or links. A Chrome extension lets you capture web pages, text, images, screenshots, and ChatGPT outputs in one click for instant organization.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Researchers, students, and knowledge workers who want to capture, organize, and save AI chats and web research into a unified, searchable knowledge base
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Audience
Researchers, creators, solopreneurs, marketers, and developers needing a tool to capture, organize, and interact with diverse content using AI to accelerate insights, creativity, and productivity
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
Free
Free Version
Supported
Free Trial
Not Supported
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Pricing
$6 per month
Free Version
Not Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Company InformationKortex
Founded: 2025
USA
yaksh1.github.io/Kortex-Landing-Page/
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Company InformationSecondBrain
United States
www.thesecondbrain.io
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
ChatGPT
Supported
Claude
Supported
Claude Sonnet 3.7
Not Supported
DeepSeek R1
Not Supported
GPT-4.1
Not Supported
GPT-4.1 mini
Not Supported
GPT-4.5
Not Supported
Gemini
Supported
Gemini Notebook
Supported
GitHub
Not Supported
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Integrations
ChatGPT
Supported
Claude
Supported
Claude Sonnet 3.7
Supported
DeepSeek R1
Supported
GPT-4.1
Supported
GPT-4.1 mini
Supported
GPT-4.5
Supported
Gemini
Not Supported
Gemini Notebook
Not Supported
GitHub
Supported
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