Keep Design System
Create beautiful and consistence user interface with ease
Once UI
Build faster than AI with Once UI for Next.js
Updated February 2026
| Keep Design System | Once UI | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 26 | 2 |
| Pros | 18 | 4 |
| FactScore™ | 71.6 | 23.9 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Keep Design System — Pros
Easy to use React library Developer focused Customizable components Reusable components Free version Seamless integration Excellent documentation Community support Design consistency Open source Tailwind CSS compatibility Dark mode Figma integration Figma Variables Fast performance Modular structure Unique designsBoth tools — Pros
—Only in Once UI — Pros
Lightning-fast frontend design Ready-to-use templates Real-time collaboration User-friendly interfaceOnly in Keep Design System — Cons
Limited documentation Limited community support Limited component varietyBoth tools — Cons
—Only in Once UI — Cons
—Details
| Keep Design System | Once UI | |
|---|---|---|
| Categories | Interface design tools, Design resources, UI frameworks | Interface design tools |
| Platforms | Web | Web |
| Became Popular | July 15, 2023 | March 29, 2023 |
| Website | keepdesign.io | once-ui.com |
Who Should Pick Which?
Choose Keep Design System if...
- Easy to use
- React library
- Developer focused
Choose Once UI if...
- Lightning-fast frontend design
- Ready-to-use templates
- Real-time collaboration
With a FactScore™ of 71.6 vs 23.9, Keep Design System leads in community reception. Keep Design System uniquely offers Easy to use and React library, while Once UI stands out for Lightning-fast frontend design and Ready-to-use templates.
What Users Say
Keep Design System
Very nice design and initiative by the team. Wish them good luck!
As a developer, I've found Keep Design System to be an invaluable resource in my projects. Its seamless integration with Figma and React makes creating beautiful and consistent user interfaces a br...
I'll admit, I get a little tired of reinventing the wheel when it comes to building UIs in React. Don't get me wrong, I love the flexibility, but sometimes you just want a head start, you know? Tha...
Once UI
Hey Product Hunters! 🚀 After only a couple of days of purchasing Once.UI for Figma I had to share my experience using this game-changing design system. This comprehensive system & UI kit has c...
I just shared it with our designer, and they gave it a 5-star rating. This will significantly ease their collaboration with R&D!
Related Comparisons
Frequently Asked Questions
Which is better, Keep Design System or Once UI?
Based on FactScore™, Keep Design System leads with a score of 71.6 vs 23.9. Keep Design System has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Keep Design System compared to Once UI?
Keep Design System uniquely offers: Easy to use, React library, Developer focused, Customizable components, Reusable components.
What are the pros of Once UI compared to Keep Design System?
Once UI uniquely offers: Lightning-fast frontend design, Ready-to-use templates, Real-time collaboration, User-friendly interface.
Is Keep Design System better rated than Once UI?
Keep Design System is rated 5.0★ from 26 reviews. Once UI is rated 5.0★ from 2 reviews.
What is the FactScore™ of Keep Design System and Once UI?
FactScore™ weighs rating and review volume together. Keep Design System scores 71.6 and Once UI scores 23.9.
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