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Pencil Project vs Wireflow
People
Price
Free
Free
Prototyping Tools
Annual estimate10 people, entry price
Free
Free
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Prototyping Tools
Overview
Focus
Prototyping Tools
Prototyping Tools
Product
Free and open-source GUI prototyping tool with built-in shapes for desktop and web mockups.
Free online user flow and wireframe tool for quickly sketching process flows and user journeys.
Headquarters
Hanoi, Vietnam
Community-led
Company size
2-10 employees
2-10 employees
Founded
2012
2018
Pricing details
Published rate
Free
Free
Free options
Free plan
Free plan
Source updated
Oct 29, 2026
Nov 2, 2026