The knowledge base that
watches your videos.

Second Brain is the only knowledge management tool that reads and understands TikToks, Instagram Reels, YouTube videos, LinkedIn posts, and podcasts — not just documents.

Most tools stop at PDFs and text. Second Brain understands everything you consume online. Plus, everything is auto-organized and searchable from day one — no manual tagging required.

ChatGPT forgets everything after your conversation ends — Second Brain remembers permanently.

Every piece of content you add becomes part of your permanent, searchable knowledge base. You can ask questions across your entire library of saved content, not just one conversation. And Second Brain can read content types (like TikToks and Reels) that ChatGPT simply cannot access.

Second Brain reads everything (videos, social, docs), auto-organizes with AI, features Visual Boards (a multi-node AI canvas with chat nodes, sources, and Notion-like pages on one infinite workspace), and lets you chat with your entire knowledge base — no other tool does all four.

Notion: Great for documents, but limited AI that can't read videos or social content. Requires manual organization.

Obsidian: Powerful but complex. Steep learning curve, manual linking, no native AI.

NotebookLM: Has AI, but can't read TikToks, Reels, or most social content. No visual interface.

Evernote: Classic note-taking, but no AI chat, no video support, no auto-organization.

Mem: AI-powered text notes, but can't read videos, social posts, or podcasts.

Logseq: Open-source outliner with graph view, but no native AI and no multimedia support.

Tana: Knowledge graph with supertags, but can't read TikToks, Reels, or social content.

Wisebase: Strong for academic research, but doesn't support video or social media content.

See detailed comparisons: vs Notion · vs NotebookLM · vs Obsidian · vs Evernote · vs Mem · vs Logseq · vs Tana · vs Wisebase

Second Brain supports almost every content type: videos, social posts, documents, web pages, audio, code, and images.

• Videos: YouTube (shorts and long-form), TikTok, Instagram Reels
• Social: LinkedIn posts and carousels, X/Twitter threads
• Documents: PDFs, Google Docs/Sheets/Slides, Word files
• Web: Articles, blog posts, any webpage
• Audio: Podcasts, voice memos, audio files
• Code: GitHub repositories, code snippets
• Images: Screenshots, diagrams, photos

Just paste a link or upload — we handle the rest.

Second Brain uses AI to automatically tag, categorize, and connect every piece of content you add — no manual sorting required.

When you add content, the AI automatically:

• Extracts key topics and themes
• Generates smart tags
• Connects it to related content in your library
• Makes it instantly searchable by meaning (not just keywords)

You can also manually organize with Projects and custom tags if you want more control.

Semantic search finds content by meaning, not just exact keyword matches.

For example, you can search "that video about building better habits" and find a TikTok titled "5 Morning Routine Tips" — because the AI understands they're about the same topic. It's like searching with your brain, not a basic search box.

Visual Boards are a multi-node AI canvas — an infinite workspace where you can have multiple AI chat nodes, your saved sources, and Notion-like pages all visible at the same time.

Instead of a single linear chat thread, you open a board and place your content spatially. Add multiple AI chat nodes — each one can explore a different angle or question. Drop in rich pages to write notes, drafts, or plans right alongside your sources and AI conversations. Everything stays on one canvas: your TikToks, PDFs, YouTube videos, AI analysis threads, and working documents — all in front of you at once.

It's a multi-threaded thinking environment. You see connections visually, run parallel AI conversations, and build knowledge — not by scrolling through a single chat, but by working with everything at the same time. It's how your brain actually works.

Pages are rich documents (similar to Notion pages) that live inside your knowledge base and are fully searchable by AI.

• Save AI chat responses with one click
• Add your own notes and thoughts
• Insert headings, lists, images, code blocks
• Build up knowledge over time

Every Page is searchable and can be included in AI chats.

Yes — your data is never used for AI model training, never sold to third parties, and never stored on third-party servers longer than needed for processing.

Second Brain uses a privacy-first architecture. Your second brain is yours alone.

Credits cover the AI processing needed to analyze your content and answer your questions.

The amount used depends on content length and complexity. Most users find the Pro plan covers regular daily use. You can always start with a lower plan and upgrade if needed.

The Chrome Extension lets you save anything while browsing — articles, ChatGPT responses, images, screenshots, entire webpages — with one click.

Content goes straight to your Second Brain, auto-organized and searchable. Never lose interesting content you find online.