Pencil Project vs Viber

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

Pencil Project

Viber

Pencil Project vs Viber: The Verdict

⚡ Summary:

Pencil Project: Pencil Project is a free and open source GUI prototyping and mockup tool. It allows users to create wireframes and prototypes for software interfaces and websites quickly and easily, without programming knowledge.

Viber: Viber is a free messaging and calling app for smartphones. It uses your phone number to connect you with people in your contacts and allows free calls, texts, photos and video messages over WiFi.

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	Pencil Project	Viber
Sugggest Score	—	—
Category	Development	Social & Communications
Pricing	Open Source	—

Product Overview

Pencil Project

Description: Pencil Project is a free and open source GUI prototyping and mockup tool. It allows users to create wireframes and prototypes for software interfaces and websites quickly and easily, without programming knowledge.

Type: software

Pricing: Open Source

Viber

Description: Viber is a free messaging and calling app for smartphones. It uses your phone number to connect you with people in your contacts and allows free calls, texts, photos and video messages over WiFi.

Type: software

Key Features Comparison

Pencil Project Features

GUI prototyping
Wireframing
Mockup creation
Export to HTML
Built-in shape library
Bitmap image support
Pages and layers

Viber Features

Free calls
Free messages
Group chats
Stickers
Photo and video sharing
Voice messages
Location sharing

Pros & Cons Analysis

Pencil Project

Pros

Free and open source
Easy to use
Cross-platform
Good for rapid prototyping
Large shape library
Active community support

Cons

Limited features compared to paid tools
Not great for high-fidelity prototypes
Limited export options
No collaborative editing features

Viber

Pros

Free calls and messages
Works across platforms
Good call quality
Fun stickers and emojis
Group chats

Cons

Contacts need to be using Viber too
Some features are paid only
No cloud sync between devices
Limited customization options

Pricing Comparison

Pencil Project

Open Source

Viber

Not listed

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Learn More About Each Product

Pencil Project

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