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Pencil Project vs ProtoPie
People
Price
Free
Prototyping Tools
Annual estimate10 people, entry price
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.
ProtoPie is an advanced prototyping tool that enables designers to create highly interactive, realistic prototypes across devices including mobile, web, IoT, and automotive interfaces.
Headquarters
Hanoi, Vietnam
Seoul, South Korea
Company size
2-10 employees
51-200 employees
Founded
2012
2014
Pricing details
Published rate
Free
Free options
Free plan
Free plan, Free trial
Source updated
Oct 29, 2026
Oct 29, 2026