Auto-Organized Knowledge Base
Your AI Knowledge Base
That Grows With You
Throw anything into your Second Brain— documents, videos, articles, images, audio files—and watch it automatically organize into a searchable, AI-chattable knowledge base.
Get crazy insights and connections you never knew existed. Ask questions, discover patterns, and unlock the hidden potential in your content with state-of-the-art AI models like Claude 4.5 Sonnet & Opus, Grok 4.1 Fast, DeepSeek R1, and GPT 5.1.
Auto-tagging & organization
AI-powered insights
Cross-content connections
Collaborative knowledge
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Powerful Features
Everything You Need to
Build Your Second Brain
A completely new way of interaction with AI. Work in visual, not in linear mode.
Chat with Anything
Chat with your content in real-time—summarize documents, search details, and get instant answers.
Auto-organized Knowledge Base
Your content is auto-tagged for quick, effortless search. Filter by topic, project, or custom tags.
AI-Powered Virtual Memory
Capture and organize knowledge seamlessly in feature-rich shareable documents, Projects, and Smart Tags.
Multi-Language Support
Language doesn't matter—chat in English with a video in Spanish. AI understands any language.
Lightning Fast
Turn days of work into minutes with instant AI-powered answers and insights.
Privacy First
Your data is never used for AI training, never sold, and never stored on AI service providers.
Works with All Your Content
YouTube, TikTok, IG Reels
PDFs & Documents
Websites & Articles
Audio & Podcasts
Code & GitHub Repos
Images & Screenshots
LinkedIn Posts, Carousels, Videos
Google Docs/Sheets/Slides
See It In Action
Check out a short demo of the
Second Brain App ✨
A completely new way of interaction with AI. Work in visual, not in linear mode.
9 hours
Without Second Brain
5 mins
With Second Brain
10,000+
Happy Users
Revolutionary Interface
A completely new way of interaction with AI.
Work in visual, not in linear mode.
The AI Visual Board lets you have multiple context nodes, chat nodes, and Notion-like pages on an infinite canvas—all visible in front of you. Chat with everything, all at once.
Infinite Canvas
Unlimited space to organize your thoughts and context
Multiple Nodes
Chat nodes, pages, and context—all visible at once
AI Chat with Everything
Interact with any node or combination of nodes instantly
No Linear Constraints
Break free from traditional chat interfaces
Spatial Memory
See relationships between your ideas visually
Multi-Context AI
Chat with multiple sources simultaneously
Chat with Anything, in Any Language
Chat with your content in real-time—summarize documents, search details, and get instant answers. From notes to PDFs, videos, and articles, AI delivers clear, conversational responses.
- Language doesn't matter, you can e.g. chat in English with a video in Spanish.
- And with one click, save AI chat responses into Pages—feature-rich, shareable documents—so you can AI chat with your knowledge base anytime.
Auto-organized Knowledge Base
Your content is auto-tagged for quick, effortless search.
- With one click, filter your knowledge base by topic, project, or custom tags.
- And then, of course, AI chat with it.
Your AI-Powered Virtual Memory
Capture and organize knowledge seamlessly in feature-rich shareable documents (Pages), Projects, and Smart Tags.
- You can then AI chat with your knowledge base, asking questions and getting insights directly from the information you've saved.
Photoshop-level Editing, With a Single Prompt
Edit any photo or design instantly, with results that look like they took hours in Photoshop — but now, it only takes one prompt.
- Swap objects, change styles, merge multiple pictures, or reimagine entire scenes. Just describe what you want, and the AI Image Editor does the rest.
Make AI Text Sound Human—And Undetectable
Transform AI-generated content into authentic, human-sounding writing. Instantly rewrite essays, emails, or articles so they feel natural and original—no robotic tone or awkward phrasing.
- Every piece is checked against leading AI detectors like GPTZero, OpenAI, and more, ensuring your text always passes as genuine.
Chrome Extension: Save Anything, Instantly Organized
Save ChatGPT responses, text, images, entire webpages, or screenshots with a single click. The Chrome Extension adds content directly to your Pages, where it's auto-organized and easy to find with powerful search.
- From browsing to saving, seamlessly capture everything you need and keep your Second Brain updated, searchable, and always accessible.
Capture Your Random Thoughts, And Never Lose Them
You're always full of great ideas and thoughts. But where to put them? They somehow always get lost.
- In Second Brain, every time you have an idea, a side panel pops on the right—the only place you need to save your thoughts.
- Just mention "@" an item in the system. Or, tag "#" a thought. It's automatically linked and grouped.
- Takes only 5 seconds. And you'll never lose your ideas again.
Use Cases
Check out the most
common use cases
Productivity Enthusiasts
Maximize your productivity and never lose a great idea again.
Capture ideas instantly with side panel
Auto-organized knowledge base
Multi-source AI chat
Smart tags and projects
Chrome extension for quick saves
Searchable virtual memory
The Best Second Brain Tool for Content Creators
Why Second Brain?
Unlike Notion, Obsidian, or NotebookLM, Second Brain lets you chat with TikToks, Reels, and YouTube videos—not just documents. It's the only AI-powered knowledge management tool built for how modern creators actually consume content.
Build your digital second brain by saving, organizing, and chatting with everything—then turn days of work into minutes.
Without Second Brain
9 hours
With Second Brain
5 mins
Add Anything to AI Chat Context
The only AI that lets you paste a TikTok, Reel, YouTube video, LinkedIn post, or X thread and instantly chat with it.
- Social Media Content: TikToks, IG Reels, YouTube videos, LinkedIn posts, X threads
- Documents: PDFs, Google Docs/Sheets/Slides, websites, articles
- Media: Audio files, podcasts, images, screenshots, code repos
Auto-Organized Knowledge Base
Everything you save is automatically tagged and organized. No manual sorting—just search and find instantly.
- Smart Auto-Tagging: AI categorizes your content automatically
- Projects & Pages: Group related content without manual work
- Instant Search: Find anything across your entire knowledge base
Turn Hours into Minutes
Research a topic, repurpose viral content, or extract insights from hours of video—all in a single conversation.
- Content Repurposing: Turn any viral video into your own script
- Research Synthesis: Combine multiple sources into actionable insights
- Idea Generation: Get content ideas based on what's working
Built for Content Creators
Not just another note-taking app. Second Brain is designed for creators who consume content across platforms.
- Humanize AI Text: Make AI-generated content pass detection tools
- Visual Board: Work spatially, not in linear chat threads
- Chrome Extension: Save inspiration from anywhere in one click
Your Data is Safe. Your Privacy Comes First.
At Second Brain, your data is never used for AI model training, never sold, and never stored on AI model service providers.
Pricing Plans
Flexible options to match
your workflow and goals
MonthlyYearly
Basic
500 CREDITS PER MONTH
$9/ month
Grok 4.1 Fast and GPT 5.1
AI Chat with YouTube videos, TikToks, IG Reels, LinkedIn posts, Google Docs, X threads, audio, PDFs, websites, TXT, MD
Build a knowledge base, and chat with it
Multi-language chat (e.g. video in Spanish, ask in English)
AI File Explorer
Save images, text, screenshots, ChatGPT responses with Chrome extension
Live web search
DeepSeek R1, Gemini 3 Pro, Claude 4.5 Sonnet & Opus
Sora 2 & Sora 2 Pro (Video generation)
Auto-tagging and auto-organization of content
AI Visual Board (visual chat, not linear)
AI Image Studio (edit, merge, create)
Humanize AI-generated text (and bypass AI detection)
Regular support
Most Popular
Pro
2500 CREDITS PER MONTH
$29/ month
Grok 4.1 Fast and GPT 5.1
AI Chat with YouTube videos, TikToks, IG Reels, LinkedIn posts, Google Docs, X threads, audio, PDFs, websites, TXT, MD
Build a knowledge base, and chat with it
Multi-language chat (e.g. video in Spanish, ask in English)
AI File Explorer
Save images, text, screenshots, ChatGPT responses with Chrome extension
Live web search
DeepSeek R1, Gemini 3 Pro, Claude 4.5 Sonnet & Opus
Sora 2 & Sora 2 Pro (Video generation)
Auto-tagging and auto-organization of content
AI Visual Board (visual chat, not linear)
AI Image Studio (edit, merge, create)
Humanize AI-generated text (and bypass AI detection)
Regular support
Ultimate
10000 CREDITS PER MONTH
$79/ month
Grok 4.1 Fast and GPT 5.1
AI Chat with YouTube videos, TikToks, IG Reels, LinkedIn posts, Google Docs, X threads, audio, PDFs, websites, TXT, MD
Build a knowledge base, and chat with it
Multi-language chat (e.g. video in Spanish, ask in English)
AI File Explorer
Save images, text, screenshots, ChatGPT responses with Chrome extension
Live web search
DeepSeek R1, Grok 4 Fast, GPT-5, Gemini 2.5 Pro, Claude 4 Sonnet
Sora 2 & Sora 2 Pro (Video generation)
Auto-tagging and auto-organization of content
AI Visual Board (visual chat, not linear)
AI Image Studio (edit, merge, create)
Humanize AI-generated text (and bypass AI detection)
Premium support
FAQ
Frequently asked
questions
What are the best second brain tools in 2025?
The best second brain tools in 2025 include Second Brain (thesecondbrain.io), Notion, Obsidian, Roam Research, and NotebookLM. However, Second Brain stands out as the only AI-powered PKM tool that can chat with social media content like TikToks, YouTube videos, and Instagram Reels—making it the top choice for content creators and productivity enthusiasts who consume content across platforms.
What are the best AI tools for content creators in 2025?
The best AI tools for content creators in 2025 include Second Brain for content ideation and knowledge management, Descript for video editing, OpusClip for short-form content, and ElevenLabs for voiceovers. Second Brain is particularly powerful because it lets creators chat with any video or social post to extract ideas, repurpose content, and build a searchable content library.
Who is Second Brain for?
Second Brain is for researchers, marketers, business leaders, developers, students, content creators, and anyone who wants to save, organize, and interact with their knowledge. It's perfect for tasks like detailed research, planning, note-taking, and managing complex projects.
How is Second Brain different from ChatGPT?
Second Brain focuses exclusively on the content you provide—no generic or off-topic answers. Whether you're saving AI chat insights, uploading documents, or combining multiple sources, Second Brain ensures precise, document-based responses tailored to your needs. Plus, with Memory and the Chrome Extension, it offers seamless saving, organization, and searchability for all your knowledge.
So much wisdom is lost when using other AI tools - but not with Second Brain.
So much wisdom is lost when using other AI tools - but not with Second Brain.
How does Second Brain work?
Second Brain combines three key features:
• AI Chat: Upload documents (books, PDFs, articles, videos, GitHub repos) and chat with your content to get summaries, insights, and actionable steps.
• Memory: Save AI conversations, manually add notes, or capture external content—all stored in expandable, organized documents.
• Chrome Extension: Save anything you find online with a single click.
Together, these features help you build an AI-powered virtual memory to store, organize, and interact with your knowledge seamlessly.
• AI Chat: Upload documents (books, PDFs, articles, videos, GitHub repos) and chat with your content to get summaries, insights, and actionable steps.
• Memory: Save AI conversations, manually add notes, or capture external content—all stored in expandable, organized documents.
• Chrome Extension: Save anything you find online with a single click.
Together, these features help you build an AI-powered virtual memory to store, organize, and interact with your knowledge seamlessly.
What is the Memory feature, and how does it work?
Memory is your AI-powered virtual archive for organizing and retrieving information. You can:
• Save AI Chat Responses: Turn valuable AI-generated insights into organized, expandable documents.
• Manually Add Content: Store notes, links, images, and code snippets to build your Second Brain.
• Auto-Save Content via the Chrome Extension: Save text, images, webpages, and screenshots with a single click.
Everything in Memory is searchable, organized, and easy to extend, so you can keep building your knowledge over time.
• Save AI Chat Responses: Turn valuable AI-generated insights into organized, expandable documents.
• Manually Add Content: Store notes, links, images, and code snippets to build your Second Brain.
• Auto-Save Content via the Chrome Extension: Save text, images, webpages, and screenshots with a single click.
Everything in Memory is searchable, organized, and easy to extend, so you can keep building your knowledge over time.
What are Pages?
Pages are extendable documents where you can organize and build on your knowledge. Each document allows you to:
• Add headings to structure your content.
• Include to-do lists for actionable steps.
• Insert images, code blocks, and rich text.
• Save and organize AI chat responses or manually added notes.
• And way more.
Pages are flexible and easily searchable, making it perfect for tasks like project planning, research organization, brainstorming, and knowledge building.
• Add headings to structure your content.
• Include to-do lists for actionable steps.
• Insert images, code blocks, and rich text.
• Save and organize AI chat responses or manually added notes.
• And way more.
Pages are flexible and easily searchable, making it perfect for tasks like project planning, research organization, brainstorming, and knowledge building.
Why do I need to have credits?
Credits ensure you get high-quality processing for each request. They cover the resources needed to analyze your content accurately and allow Second Brain to provide focused, document-based insights tailored to your needs.
How many credits do I need?
The credits you need depend on the complexity of the documents you upload, the length of your conversations, and the AI models you choose. Here's a simple guide:
• Basic Plan: Ideal for occasional use of Second Brain.
• Pro Plan: Perfect if you plan to use Second Brain regularly, almost every day, for in-depth research and planning.
• Ultimate Plan: Best for power users who rely on Second Brain daily, with multiple conversations and complex projects.
Not sure which plan is right for you? Start with a lower plan to see how much you use—you can always buy more credits or upgrade as needed.
• Basic Plan: Ideal for occasional use of Second Brain.
• Pro Plan: Perfect if you plan to use Second Brain regularly, almost every day, for in-depth research and planning.
• Ultimate Plan: Best for power users who rely on Second Brain daily, with multiple conversations and complex projects.
Not sure which plan is right for you? Start with a lower plan to see how much you use—you can always buy more credits or upgrade as needed.
What is the Second Brain method?
The Second Brain method is a system for knowledge management that helps you capture, organize, and retrieve information efficiently. Our platform enables you to implement this method by integrating your documents and sources into one accessible place.
How do I build a digital second brain?
To build a digital second brain, you need three components: 1) A capture system to save ideas and content instantly, 2) An organization system with tags, folders, or projects, and 3) A retrieval system to find and use your knowledge. Second Brain provides all three with AI-powered auto-organization, smart tagging, and the ability to chat with your entire knowledge base.
How does Second Brain compare to Notion, Obsidian, and NotebookLM?
Second Brain combines the best of PKM tools with AI capabilities that others don't have. Unlike Notion (great for docs but limited AI), Obsidian (powerful but complex), or NotebookLM (AI but no social media support), Second Brain lets you chat with TikToks, Reels, YouTube videos, LinkedIn posts, AND documents—all in one visual interface. It's the only tool built specifically for how modern creators and professionals consume content.
How does Second Brain integrate with tools like Notion or Evernote?
Second Brain complements tools like Notion, Evernote, and OneNote by enabling you to interact with saved content using AI. Export insights, chat with saved notes, and organize everything seamlessly in your virtual Memory.
Can I implement the Second Brain system using this platform?
Absolutely! Second Brain is designed to be your digital, AI-powered assistant. Whether you're saving insights, organizing documents, or chatting with your knowledge, our platform helps you implement and scale your Second Brain system effortlessly.
What makes Second Brain the best tool for content creators?
Second Brain is built specifically for content creators because it can: 1) Chat with any TikTok, Reel, or YouTube video to extract ideas, 2) Help you repurpose viral content for your niche, 3) Humanize AI-generated text to pass AI detectors, 4) Auto-organize your content library with smart tags, and 5) Generate scripts and ideas based on your saved inspiration. It's the complete AI toolkit for modern creators.
How can marketers use Second Brain for competitor analysis and research?
Marketers use Second Brain to: 1) Analyze competitor content by chatting with their videos, posts, and ads, 2) Extract messaging strategies and hooks from successful campaigns, 3) Build a swipe file of inspiration that's searchable and organized, 4) Research trends across TikTok, YouTube, and LinkedIn without watching hours of content, and 5) Generate campaign ideas based on what's working in their industry. It's the fastest way to turn competitive intelligence into actionable marketing strategies.
What does the Chrome Extension do?
The Second Brain Chrome Extension allows you to save text, images, webpages, and screenshots directly into your Memory. With one click, content is auto-organized and instantly searchable in your Second Brain. It's the perfect tool for capturing insights, research, or inspiration while browsing the web.
How can Second Brain help me achieve better results?
Second Brain eliminates guesswork and information overload by providing clear, accurate answers from your chosen sources. Save and organize content, chat with documents, and plan projects—all in one place. With powerful tools like Memory and the Chrome Extension, you'll work faster, stay organized, and produce better results.
Think, Plan, and Execute
with Lightning Speed
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