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OpenContacts vs SumatraPDF

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

OpenContacts icon
OpenContacts
SumatraPDF icon
SumatraPDF

OpenContacts vs SumatraPDF: The Verdict

⚡ Summary:

OpenContacts: OpenContacts is an open source contact and customer relationship management (CRM) software. It allows businesses to store contact details, track interactions, manage deals and campaigns, and analyze data.

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.

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 OpenContacts SumatraPDF
Sugggest Score — —
Category Business & Commerce Office & Productivity
Pricing Open Source Open Source

Product Overview

OpenContacts
OpenContacts

Description: OpenContacts is an open source contact and customer relationship management (CRM) software. It allows businesses to store contact details, track interactions, manage deals and campaigns, and analyze data.

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

OpenContacts
OpenContacts Features
  • Contact management
  • Lead and deal tracking
  • Campaign management
  • Reporting and analytics
  • Calendar
  • Email integration
  • Mobile access
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

OpenContacts
OpenContacts

Pros

  • Free and open source
  • Customizable and extensible
  • Good basic CRM features
  • Active development community

Cons

  • Less features than paid CRM options
  • Limited support options
  • May require technical expertise to fully customize
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

OpenContacts
OpenContacts
  • Open Source
SumatraPDF
SumatraPDF
  • Open Source

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Learn More About Each Product

OpenContacts
OpenContacts
Reviews, pricing & alternatives →
SumatraPDF
SumatraPDF
Reviews, pricing & alternatives →

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