Pencil Project
Cross-platform open-source application for designing user interface mockups and prototypes
- Also known as
- pencil-project
What is Pencil Project?
A freely available desktop tool for creating wireframes and mockups with built-in templates for web, mobile, and desktop user interfaces. Includes diagram drawing, interactive prototyping, and multi-format export capabilities.
Pencil Project pricing
We don't have Pencil Project's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Free and open-source
What Pencil Project does
The capabilities that matter for wireframing, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Architecture model
- Desktop local application
- Enforced low fidelity sketch rendering aesthetic
- -
- Pre built ios android web UI component library
- ✓
- AI generation from text prompts or napkin sketches
- -
- Drag and drop click through user flow linking
- ✓
- Real time multiplayer crdt cursor sync
- -
- Confluence and jira native iframe embedding
- -
- Export to high fidelity tools figma sketch
- -
- Click heatmap and basic usability testing integration
- -
- Offline editing mode
- ✓
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- -
Platform & deployment
Independently observed- macOS
- Linux
- Windows
Integrations (1)
Independently observed- OpenClipart.org←•
Pencil Project alternatives
Other wireframing we track, ranked by the same independent score.
- Wireframe.ccBrowser-based tool for sketching website and application layouts with clickable prototypeslow · 29%
- Quant-UXLow-code platform for prototyping and testing UX designs with real user feedbacklow · 29%
- MockFlowA collaborative online whiteboarding and wireframing platform that lets teams create, iterate, and export UI designs to production.medium · 55%
- NinjamockOnline collaborative wireframe and mockup design tool for rapid prototypinglow · 37%
- Fluid UIBrowser-based tool for rapidly creating and testing interactive prototypes of web and mobile appslow · 38%
- JustinmindA tool for designing and prototyping interactive web and mobile applications without codingmedium · 56%
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Pencil Project, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 58 | 0.08 | 4.5 | ✓ |
| Integrations | 9 | 0.07 | 0.6 | ✓ |
| Stars | 0 | 0.03 | 0.0 | - |
| Dependent projects | 0 | 0.06 | 0.0 | - |
| Development activity | 0 | 0.09 | 0.0 | - |
| Release cadence | 0 | 0.05 | 0.0 | - |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Security score | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Architecture model: desktop_local_application · Offline editing mode: Yes · Drag and drop click through user flow linking: Yes · Pre built ios android web ui component library: Yes | mediumsource · 2026-08-31 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-08-31 · 60% |