AI Chat with Anything—Build Your Second Brain App Today
Effortlessly chat with your documents, YouTube videos, PDFs, websites, and more—summarize, search, and interact with your content.
Save everything in your AI-powered virtual memory and seamlessly chat with your knowledge base using the most advanced AI models, including DeepSeek R1, GPT-4.5, Claude 3.7 Sonnet, and GPT-4o.
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2692
users built their Second Brain
Check out a short demo of the Second Brain App ✨
Combine Knowledge from Multiple Sources to Create Tailored, Actionable Strategies Instantly
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.
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.
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The smartest AI models on the planet
DeepSeek R1, GPT-4.5, Claude 3.7 Sonnet, GPT-4o—you name it.
With only 1 Second Brain subscription, you have access to the world's top AI models—and the list constantly gets updated.
Save, Edit, and Share ChatGPT Responses
Capture and organize ChatGPT history with ease.
- Save ChatGPT Responses: Preserve valuable AI insights instantly.
- Edit and Customize: Enhance saved content with notes, links, checklists, and multimedia.
- Seamless Sharing: Collaborate with teammates or clients effortlessly.
Turn AI conversations into actionable knowledge in a searchable, auto-organized system that grows with you.
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AI Copywriter Which Sounds Like You
Say goodbye to generic, robotic content.
Second Brain AI Copywriter understands your distinct style, crafting emails, blogs, and more that resonate with the human touch—exactly the way you would write.
Chrome Extension: Save Anything, Instantly Organized
Save 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.
Why Second Brain?
With AI Chat across multiple sources, Second Brain saves you days of work by transforming research, planning, and execution into actionable steps in minutes.
Effortlessly save, edit, organize, and structure all that knowledge in your AI-powered virtual memory—then dive deeper by chatting with your knowledge base to extract insights and make smarter decisions faster.
Without Second Brain
9 hours
With Second Brain
5 mins
Turn scattered knowledge into an organized, searchable system:
- Save AI Chat Responses: Capture key insights instead of losing them.
- Flexible Organization: Store everything within Pages, Projects, and Smart Tags for easy access.
- AI Chat With Your Knowledge Base: Unlock powerful insights and get instant answers from your stored knowledge.
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
Frequently asked questions
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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—Powered by the Second Brain App
Start building your Second Brain today!
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