assistant-ui vs Once UI

Comparing the features of assistant-ui to Once UI

Feature
assistant-ui
Once UI

Capability Features

Add Attachment Feature
AI Chat UI
AI Chatbot Example
Community Support
Community-driven
Component Library
100
Contact Sales Option
Continuous Updates
Copy-paste Blocks
75
Copy-paste Pages
Deployment-ready Apps
10
Examples and Templates
Magic PortfolioMagic DocsMagic BioSupabase StarterMagic SpotlightMagic AgentMagic ConvertMagic Store
In-sync Figma Tokens
Landing Page Templates
Mockup Assets
Multiple Chat UI Layouts
5
Onboarding and Support
Open Source
MIT
Priority Support
Public Roadmap
Quick Setup
React Integration
Request Components
Send Message Feature
TypeScript Support
Unlimited Seats (Free/Team)

Integration Features

Built on shadcn/ui
Figma Kit Integration
NextJS Support
NPM Installation
Supabase Support
Tailwind CSS Integration
Vercel AI SDK Compatibility

Limitation Features

Next.js Only
No API Mentioned
No Mentioned File Format Support
No Pricing Plans
No Refund After Download
No Refunds Policy
No Support for Other Frameworks
Not a Utility Class Framework
Open Source Core
Single Seat (Pro)
Unique Syntax

Pricing Features

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