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Altarsoft PDF Reader vs SumatraPDF

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

Altarsoft PDF Reader icon
Altarsoft PDF Reader
SumatraPDF icon
SumatraPDF

Altarsoft PDF Reader vs SumatraPDF: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature Altarsoft PDF Reader SumatraPDF
Sugggest Score
Category Office & Productivity Office & Productivity
Pricing Open Source Open Source

Product Overview

Altarsoft PDF Reader
Altarsoft PDF Reader

Description: Altarsoft PDF Reader is a free, open-source PDF viewer for Windows. It provides basic PDF viewing, printing and annotation features in a lightweight program.

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

Altarsoft PDF Reader
Altarsoft PDF Reader Features
  • View PDF files
  • Print PDF files
  • Annotate PDF files
  • Copy text from PDF files
  • Search text in PDF files
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

Altarsoft PDF Reader
Altarsoft PDF Reader
Pros
  • Free and open source
  • Lightweight and fast
  • Easy to use
  • Supports basic PDF features
Cons
  • Limited features compared to paid options
  • Lacks advanced editing capabilities
  • Few customization options
  • Basic UI
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

Altarsoft PDF Reader
Altarsoft PDF Reader
  • Open Source
SumatraPDF
SumatraPDF
  • Open Source

Ready to Make Your Decision?

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