Save Hours and Days with Instant Research, Planning, and Execution

Second Brain lets you chat with anything—books, PDFs, videos, websites, code, and more—saving you hours by turning complex research into immediate, actionable steps.

Get complete insights and build effective plans from a single, focused AI assistant designed for all your needs.

Document-Focused Insights

Document-Focused Insights
100% accurate, no off-topic info
Says “I don’t know” if answer isn’t there

Multi-Language & Source Compatibility

Chat in any language with any document
Combine sources for complete answers
Handles PDFs, videos, articles, and more

From Research to Actionable Plans

Turns insights into step-by-step plans
Saves time from research to execution
Perfect for instant, usable results

Multiple Sources.
One Powerful Answer.

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.

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AI chat with custom context in any language

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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AI powered virtual memory

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.

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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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Save ChatGPT response history

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.

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AI copywriter that knows your style

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.

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Second Brain Chrome Extension for seamlessly saving content across web with 1 click

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

Do Days of Work in Minutes
Turn time-consuming research and planning into fast, actionable steps.
Build Your AI-Powered Virtual Memory

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.
Multi-Source Mastery
Chat with multiple sources like PDFs, articles, YouTube videos, GitHub repos, and more—all in a single conversation.
No Guesswork
If Second Brain doesn’t have the answer, it simply says so. That means no off-topic or misleading information.

Think, Plan, and Execute with Lightning Speed—Powered by the Second Brain App

Start building your Second Brain today!

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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.

Start Now
AI chat with custom context in any language

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.

Start Now
AI powered virtual memory

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.

Start Now

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.

Start Now
Save ChatGPT response history

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.

Start Now
AI copywriter that knows your style

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.

Start Now
Second Brain Chrome Extension for seamlessly saving content across web with 1 click