Asterisk vs Okular

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

Asterisk

Okular

Asterisk vs Okular: The Verdict

⚡ Summary:

Asterisk: Asterisk is an open source communications software that allows you to build telephony applications and services. It supports voice over IP, video conferencing, voicemail, auto attendant, interactive voice response, and more. It can be used to build PBX systems, call center solutions, and other communications platforms.

Okular: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.

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	Asterisk	Okular
Sugggest Score	—	—
Category	Network & Admin	Office & Productivity
Pricing	Open Source	Free

Product Overview

Asterisk

Description: Asterisk is an open source communications software that allows you to build telephony applications and services. It supports voice over IP, video conferencing, voicemail, auto attendant, interactive voice response, and more. It can be used to build PBX systems, call center solutions, and other communications platforms.

Type: software

Pricing: Open Source

Okular

Description: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.

Type: software

Pricing: Free

Key Features Comparison

Asterisk Features

PBX functionality
VoIP
Interactive voice response
Voicemail
Conference calling
Call routing
Call queuing

Okular Features

Supports viewing PDF, PostScript, DjVu, CHM, XPS, ePub and other formats
Allows annotating, highlighting and adding comments to PDFs
Has different view modes like single page, facing, overview grid
Supports tabs for opening multiple documents
Has presentation mode for slideshows
Can fill interactive PDF forms
Allows saving filled forms as PDF or text
Has search functionality to find text in documents
Can encrypt PDF files
Has document information and metadata viewer
Supports table of contents navigation
Has different reflow modes for reading ePubs
Can print documents to system printer

Pros & Cons Analysis

Asterisk

Pros

Open source and free
Highly customizable
Supports many protocols and codecs
Active development community
Integrates with many CRM and business software

Cons

Steep learning curve
Requires technical expertise to setup and manage
Limited official support
Fragmented documentation
Not as feature rich as proprietary PBX systems

Okular

Pros

Free and open source
Clean and intuitive interface
Good performance with large PDFs
Lots of annotation and markup tools
Supports many document formats
Available on Linux, Windows, macOS

Cons

Limited format support compared to some alternatives
Annotation features may be limited for some users
No cloud storage integration
Less features than paid alternatives

Pricing Comparison

Asterisk

Open Source

Okular

Free

Related Comparisons

Adobe Acrobat Reader

vs Asterisk vs Okular

Adobe Acrobat DC

vs Asterisk vs Okular

SumatraPDF

vs Asterisk vs Okular

PDF-XChange Viewer

vs Asterisk vs Okular

Yate - Yet Another Telephony Engine

vs Asterisk vs Okular

Thirdlane Multi Tenant PBX

vs Asterisk vs Okular

Learn More About Each Product

Reviews, pricing & alternatives →

Reviews, pricing & alternatives →

Ready to Make Your Decision?

Explore more software comparisons and find the perfect solution for your needs

Asterisk Alternatives

Okular Alternatives

Browse More Software