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Wireframe Software

Pencil Project

New· 8

Open-source desktop GUI prototyping tool for creating mockups on major platforms

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About Pencil Project

Pencil Project is an open-source application for drawing mockups of graphical screens. It installs on popular desktop operating systems and is meant to be easy for anyone to pick up.

What Pencil Project offers

  • Mockup drawing — The layout of an app can be sketched on the desktop without needing a subscription service.
  • Stencils — New stencils can be created, and a set of tutorials with sample code explains how to create them.
  • Cross-platform downloads — Downloads are provided for several desktop platforms.
  • Open development — The source is open, and release notes describe each version.

Key facts

  • Latest stable release listed: Version 3, dated October 2019
  • General availability of the version 3 line: February 2017
  • Development of the new version began: November 2015

Profile written by TrustList from the business's own published information, Oct 2026.

Categories & features

Trust Score

8/ 100
Trust Score: New

An earned signal from verification, reviews, awards, transparency and engagement — the vendor can't buy it.

Verification
0/100 · 20%
Reviews
0/100 · 30%
Awards
0/100 · 15%
Transparency
42/100 · 20%
Engagement
0/100 · 15%
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Updated 8/11/2026

Rankings

As of 2026-10-05. Organic ranks only; sponsored placements are never ranks.

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