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SumatraPDF vs Trillian

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

SumatraPDF icon
SumatraPDF
Trillian icon
Trillian

SumatraPDF vs Trillian: The Verdict

⚡ Summary:

SumatraPDF: 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.

Trillian: Trillian is an instant messaging application that supports multiple protocols in one interface, including AIM, ICQ, MSN, Yahoo Messenger, and more. It allows connecting to multiple chat networks at once from a single app.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature SumatraPDF Trillian
Sugggest Score — —
Category Office & Productivity Social & Communications
Pricing Open Source —

Product Overview

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

Trillian
Trillian

Description: Trillian is an instant messaging application that supports multiple protocols in one interface, including AIM, ICQ, MSN, Yahoo Messenger, and more. It allows connecting to multiple chat networks at once from a single app.

Type: software

Key Features Comparison

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
Trillian
Trillian Features
  • Supports multiple chat protocols in one interface
  • Connect to AIM, ICQ, MSN, Yahoo Messenger and more all at once
  • Customizable interface and themes
  • Tabbed conversations
  • Send files and links
  • Encrypted chats
  • Group chats
  • Offline messaging

Pros & Cons Analysis

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
Trillian
Trillian

Pros

  • Consolidates multiple chat apps into one
  • Cross-platform support
  • Free basic version available
  • Open source codebase

Cons

  • Some protocol support can be buggy
  • Limited features compared to official apps
  • Mobile app lags behind desktop version

Pricing Comparison

SumatraPDF
SumatraPDF
  • Open Source
Trillian
Trillian
  • Not listed

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Learn More About Each Product

SumatraPDF
SumatraPDF
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Trillian
Trillian
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