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Facebook Viewpoints vs Knocker

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

Facebook Viewpoints icon
Facebook Viewpoints
Knocker icon
Knocker

Facebook Viewpoints vs Knocker: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature Facebook Viewpoints Knocker
Sugggest Score — —
Category Social & Communications Security & Privacy
Pricing — Open Source

Product Overview

Facebook Viewpoints
Facebook Viewpoints

Description: Facebook Viewpoints is a Facebook research app that pays users for providing feedback. Users earn points by completing surveys, tasks, and more which can be redeemed for gift cards.

Type: software

Knocker
Knocker

Description: Knocker is a free and open-source port scanning tool for Linux. It allows system administrators to easily check what network ports are open on a server, which helps identify potential security vulnerabilities or misconfigurations.

Type: software

Pricing: Open Source

Key Features Comparison

Facebook Viewpoints
Facebook Viewpoints Features
  • Earn points by completing surveys
  • Earn points by testing new Facebook features and apps
  • Redeem points for gift cards
  • Invite friends to earn bonus points
  • Provide demographic info to receive surveys you qualify for
Knocker
Knocker Features
  • Port scanning
  • Service detection
  • OS fingerprinting
  • Scriptable via Lua
  • Command line interface
  • Open source

Pros & Cons Analysis

Facebook Viewpoints
Facebook Viewpoints
Pros
  • Get paid for providing feedback
  • Simple and easy way to earn gift cards
  • Good way to make a little extra money in your free time
Cons
  • Limited gift card options
  • Tedious surveys with no guarantee of payment
  • Low point conversion rate to gift cards
Knocker
Knocker
Pros
  • Free and open source
  • Easy to use
  • Lightweight and fast
  • Powerful scanning capabilities
  • Extensible via Lua scripts
  • Cross-platform
Cons
  • Limited reporting capabilities
  • No GUI
  • Steep learning curve for Lua scripting

Pricing Comparison

Facebook Viewpoints
Facebook Viewpoints
  • Not listed
Knocker
Knocker
  • Open Source

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Learn More About Each Product

Facebook Viewpoints
Facebook Viewpoints
Reviews, pricing & alternatives →
Knocker
Knocker
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