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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”.

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.

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

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

Audience

Researchers, students, and knowledge workers who want to capture, organize, and save AI chats and web research into a unified, searchable knowledge base

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

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

$6 per month
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

Kortex
Founded: 2025
USA
yaksh1.github.io/Kortex-Landing-Page/

Company Information

SecondBrain
United States
www.thesecondbrain.io

Alternatives

Alternatives

Yatter

Yatter

Infokey Technology Private Limited

Categories

AI Productivity Supported

Categories

AI Tools Supported

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
Google Chrome Supported
Google Docs Supported
Grok 3 Not Supported
Instagram Not Supported
Loom Not Supported
Perplexity Supported
TikTok Not Supported
YouTube Not Supported

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
Google Chrome Not Supported
Google Docs Not Supported
Grok 3 Supported
Instagram Supported
Loom Supported
Perplexity Not Supported
TikTok Supported
YouTube Supported
Claim Kortex and update features and information
Claim Kortex and update features and information
Claim SecondBrain and update features and information
Claim SecondBrain and update features and information