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not8 vs SumatraPDF

Professional comparison and analysis to help you choose the right software solution for your needs.

not8 icon
not8
SumatraPDF icon
SumatraPDF

not8 vs SumatraPDF: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature not8 SumatraPDF
Sugggest Score — —
Category Office & Productivity Office & Productivity
Pricing Open Source Open Source

Product Overview

not8
not8

Description: not8 is an open-source note taking application focused on privacy and security. It allows users to easily take notes, organize them, and sync between devices while keeping data encrypted locally.

Type: software

Pricing: Open Source

SumatraPDF
SumatraPDF

Description: SumatraPDF is a free and open-source PDF, eBook, XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. It is lightweight, customizable, and supports many advanced PDF features.

Type: software

Pricing: Open Source

Key Features Comparison

not8
not8 Features
  • End-to-end encryption
  • Local data storage
  • Open source
  • Cross-platform availability
  • Markdown support
  • Basic note organization
  • Sync between devices
SumatraPDF
SumatraPDF Features
  • Lightweight and fast PDF reader
  • Supports many document formats like PDF, ePub, MOBI, XPS, DjVu, CHM, CBZ, CBR
  • Customizable with themes, keyboard shortcuts
  • Tabbed document interface
  • Supports annotations and highlighting
  • Continuous scrolling
  • Supports reflowable text
  • Supports digital signatures
  • Supports comics book formats
  • Supports eBooks
  • Supports syncing open documents across devices

Pros & Cons Analysis

not8
not8
Pros
  • Strong privacy and security
  • Local data control
  • Free and open source
  • Available on multiple platforms
  • Simple markdown formatting
Cons
  • Limited features compared to proprietary apps
  • Requires some technical know-how to set up and use
  • No collaboration features
  • Basic UI
  • Sync can be tricky to set up
SumatraPDF
SumatraPDF
Pros
  • Lightweight and fast
  • Supports many document formats
  • Free and open source
  • Customizable
  • Good support for comics and eBooks
Cons
  • Limited annotation features compared to advanced PDF editors
  • Lacks OCR capabilities
  • No cloud storage integration
  • No mobile apps

Pricing Comparison

not8
not8
  • Open Source
SumatraPDF
SumatraPDF
  • Open Source

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Learn More About Each Product

not8
not8
Reviews, pricing & alternatives →
SumatraPDF
SumatraPDF
Reviews, pricing & alternatives →

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