SigmaNote

Description

SigmaNote is an AI-powered second-brain app that helps you capture, organize, and use knowledge from any source. You can import PDFs, EPUBs, Word, Excel, and PowerPoint files, capture web pages, extract YouTube video transcripts, and record voice notes with real-time transcription, all into one hub. AI agents grounded in your data then help you learn by conversation and turn what you capture into output.

Instead of just reading, you chat with your knowledge: ask any question and the AI finds answers grounded in your data, even across multiple sources, with natural-language search that needs no keywords. You can turn any file or note into an audio experience, pause anytime to ask questions, read EPUBs and PDFs while chatting with the text, and co-create summaries, articles, and reports with AI. Content is organized in a flexible, visual knowledge tree.

SigmaNote is designed for students, researchers, founders, consultants, lawyers, clinicians, and creators, anyone who works with large amounts of documents and wants AI help extracting insights. It syncs across iPhone, iPad, Mac, and web, so your second brain is always with you. Notes are stored with end-to-end encryption, sync traffic is protected with TLS 1.3, and your content is never used for model training.

SigmaNote offers a free Starter tier (5 captures per day, 5 AI chats per day, up to 5MB per file) with full access to all features, plus Premium monthly and yearly plans that add unlimited imports and prompts, 15GB of cloud storage, and a premium AI model.

SigmaNote's Core Features

• One hub for PDFs, EPUBs, Office files, web pages, and YouTube videos

• AI chat grounded in your knowledge base across multiple sources

• Voice recording with real-time transcription

• Listen to files and notes as audio, then ask questions

• Natural-language search with no keywords required

• AI-powered note creation and knowledge into output

• Cross-platform sync across iOS, Mac, and web

• End-to-end encrypted storage, never used for training

How to use SigmaNote?

1. 1

   Capture anything: Import PDFs, Office files, EPUBs, YouTube links, web pages, and voice notes.

2. 2

   Organize: Group content in a flexible, visual knowledge tree.

3. 3

   Chat with your knowledge: Ask questions and get answers grounded in your own data.

4. 4

   Create: Use AI to summarize, write, and expand your ideas into deliverables.

5. 5

   Sync: Continue on any device with iPhone, iPad, Mac, and web sync.

SigmaNote's Use Cases

• Research organization
• Document-heavy professional work
• Content research
• Lecture and meeting capture
• Turning knowledge into deliverables

FAQ from SigmaNote

• What is SigmaNote?

  SigmaNote is an AI-powered second-brain app that helps you capture, organize, and use knowledge from any source, with AI agents grounded in your data to learn by conversation and turn knowledge into output.

• What file formats does SigmaNote support?

  PDF (text and image-based), EPUB, Word, PowerPoint, Excel, web articles, YouTube links with auto-transcript, and any file shared from iOS apps like Files, Dropbox, Safari, and Gmail.

• Who is SigmaNote for?

  Students, researchers, founders, consultants, lawyers, clinicians, and creators, especially professionals who work with large amounts of documents and need AI help extracting insights.

• Is SigmaNote free to use?

  Yes. A free Starter tier lets you capture 5 times per day, chat with AI 5 times per day, and store up to 5MB per file, with premium tiers for more capacity.

• How is my data protected?

  All notes are stored with end-to-end encryption, sync traffic uses TLS 1.3, your content is never used for model training, and you can permanently delete notes, files, or chats anytime.

• Does it work across devices?

  Yes. Your knowledge base syncs instantly across iPhone, iPad, Mac, and web, so you can start on one device and continue on another.