vioscaleAI
Comparison

Fluid UI vs Pencil Project

On the evidence we track, Fluid UI leads this comparison with a composite score of 63/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Fluid UI full profile →Pencil Project full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★Fluid UI63
Pencil Project30
Score
vioscaleAI score
Fluid UI63 / 100medium · 56%
Pencil Project30 / 100medium · 62%
Pricing
Free tier
Fluid UI✓
Pencil Project✓
Model
Fluid UIfreemium
Pencil Projectopen_source
Price level
Fluid UIlow
Pencil Projectfree
Starting price
Fluid UI$8.25
Pencil Project–
Transparent
Fluid UI✓
Pencil Project–
Integrations
Count
Fluid UI0
Pencil Project1
Security
Scorecard
Fluid UI–
Pencil Project2.2
Vulnerabilities
Adoption
Dependent repos
Fluid UI–
Pencil Project0
Github stars
Fluid UI–
Pencil Project9,875
Activity
Commits last 30d
Fluid UI–
Pencil Project0
Release
Cadence days
Fluid UI–
Pencil Project41
History
Fluid UI–
Pencil Project11 items
License
Spdx
Fluid UI–
Pencil ProjectGPL-2.0
Language
Primary
Fluid UI–
Pencil ProjectJavaScript
Market
Availability
Fluid UIAvailable worldwide · HQ IE
Pencil Project–
Content
Faq
Fluid UI5 items
Pencil Project4 items

Capabilities

Feature-by-feature on the axes that matter for wireframing. “-” means undocumented, not absent.

Capabilities
Architecture model
Fluid UIManaged cloud saas browser
Pencil ProjectDesktop local application
Enforced low fidelity sketch rendering aesthetic
Fluid UI✗
Pencil Project-
Pre built ios android web UI component library
Fluid UI✓
Pencil Project✓
AI generation from text prompts or napkin sketches
Fluid UI✗
Pencil Project-
Drag and drop click through user flow linking
Fluid UI✓
Pencil Project✓
Real time multiplayer crdt cursor sync
Fluid UI✓
Pencil Project-
Confluence and jira native iframe embedding
Fluid UI✗
Pencil Project-
Export to high fidelity tools figma sketch
Fluid UI✗
Pencil Project-
Click heatmap and basic usability testing integration
Fluid UI✗
Pencil Project-
Offline editing mode
Fluid UI✗
Pencil Project✓
SOC2 type ii
Fluid UI✗
Pencil Project-
ISO 27001
Fluid UI✗
Pencil Project-
Pricing model
Fluid UIFreemium project limit
Pencil Project-

What each one is

The product in its own terms, so the numbers below have context.

Fluid UI

Leader

A collaborative prototyping platform where designers and product teams can quickly build interactive wireframes and high-fidelity prototypes using pre-built UI component libraries, test on mobile devices, and iterate with real-time team collaboration and built-in feedback tools.

Independently observed

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.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Fluid UI

Leader
from $8.25/moSubscriptionFree tier

From $8.25/month or $99/year. Free tier with up to 5 projects.

  • FreeFree
    • all libraries
    • unlimited uploads
    • reviewing
    • on-device testing with player app
  • Solo$8.25/month or $99/year
    • all libraries
    • unlimited uploads
    • reviewing
    • on-device testing
  • Pro$19.08/month or $229/year
    • export
    • print
    • reviewer comments
  • Team$41.58/month or $499/year
    • real-time team collaboration
    • all features
    • unlimited projects
    • unlimited users
as of verify ↗

Pencil Project

Open sourceFree tier

Free and open-source

as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Fluid UI✓
Pencil Project✗
iOS
Fluid UI✓
Pencil Project✗
Android
Fluid UI✓
Pencil Project✗
macOS
Fluid UI✗
Pencil Project✓
Linux
Fluid UI✗
Pencil Project✓
Deployment
Cloud / SaaS
Fluid UI✓
Pencil Project–

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Fluid UI

Leader

Not documented yet.

Pencil Project

1 total
  • OpenClipart.org
Independently observed
Still deciding?

Fluid UI or Pencil Project: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.