Once UI vs UI Guideline

Comparing the features of Once UI to UI Guideline

Feature
Once UI
UI Guideline

Capability Features

AI Chatbot Example
Annual Top 20 Systems
20
Community-driven
Component Analysis
Deep analysis of the world's largest Design Systems, including naming, properties, anatomy, and best practices.
Component Library
100
Component List
CalendarSearchModalToggle ButtonAlertColor PickerEmpty StateRatingButton
Component Naming Guidance
Consolidated JSON Files
Continuous Updates
Copy-paste Blocks
75
Copy-paste Pages
Deployment-ready Apps
10
Design System Synthesis
Examples and Templates
Magic PortfolioMagic DocsMagic BioSupabase StarterMagic SpotlightMagic AgentMagic ConvertMagic Store
Figma Kit
In-depth Guides
In-sync Figma Tokens
Landing Page Templates
Manual Pattern Review
Mockup Assets
Newsletter
Number of Components
60
Onboarding and Support
Open Source
MIT
Open Source Code
Priority Support
Properties and Anatomy Documentation
Public Roadmap
Request Components
UI Component Catalog
Unlimited Seats (Free/Team)
Waitlist Signup

Integration Features

Figma Kit Integration
NextJS Support
NPM Installation
Supabase Support

Limitation Features

Next.js Only
No API Integration Mentioned
No Export to PDF
No Mentioned Paid Plans
No Plugin Marketplace
No Refund After Download
No Refunds Policy
No Support for Other Frameworks
No User Authentication
Not a Utility Class Framework
Open Source Core
Single Seat (Pro)
Unique Syntax

Other Features

Used by Professionals
Amsterdam UniversityAsanaAtlassianFeedlyZendeskZero HeightVisualCV
User Base Size
6700
Waitlist Size
2034

Pricing Features

Free Access
Free Tier
Lock-in Pricing
Pro Plan Price
$320/year
Refund Policy
No refunds after access
Student Discount
40% off first year
Team Plan
$2000/year