Radix UI
Open-source UI components for building accessible web apps
Rely.io
The developer portal with an AI assistant you can speak with
Updated February 2026
| Radix UI | Rely.io | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 24 | 105 |
| Pros | 10 | 19 |
| FactScore™ | 69.9 | 100.7 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Radix UI — Pros
Accessible UI components Developer experience Un-styled components React compatibility Community involvement Customizable Excellent documentation Fast performance Headless component library Theme componentBoth tools — Pros
—Only in Rely.io — Pros
Easy to use Internal developer portal AI assistant Boosts engineering productivity Easy setup Streamlines DevOps tasks Intuitive design Time saver Unified engineering stack Automated visibility Custom AI assistant Valuable metrics Dashboard and analytics capabilities Flexible data model Modern interface No-code approach Proactive assistance Quick response time Real-time feedbackOnly in Radix UI — Cons
Customizable Limited built-in componentsBoth tools — Cons
—Only in Rely.io — Cons
Complex setup Mobile app limitations Pricing concernsDetails
| Radix UI | Rely.io | |
|---|---|---|
| Categories | Interface design tools, Engineering & Development, UI frameworks | Engineering & Development, AI Chatbots, AI Infrastructure Tools |
| Platforms | Web | Web |
| Became Popular | December 17, 2020 | January 8, 2024 |
| Website | radix-ui.com | rely.io |
Who Should Pick Which?
Choose Radix UI if...
- Accessible UI components
- Developer experience
- Un-styled components
Choose Rely.io if...
- Easy to use
- Internal developer portal
- AI assistant
With a FactScore™ of 69.9 vs 100.7, Rely.io leads in community reception. Radix UI uniquely offers Accessible UI components and Developer experience, while Rely.io stands out for Easy to use and Internal developer portal.
What Users Say
Radix UI
Perfection! It really shows that you have thought about the DX and APIs all the way through, there are so many good and clever features here. I've always been a fan of Radix, but this is one level ...
So many websites have buggy dropdowns and modals. With Radix, these primitives just work, i.e., pressing ESC just closes a modal as you'd expect. No customization needed. Would love for them to exp...
As part of a larger effort to reduce complexity in our own codebase and increase accessibility of Strapi products, we've made the decision to migrate to Radix-UI primitives for many of our components
Rely.io
Finally an answer to distributed dev stacks! I worked with startups for over 10 years and never once found a tool like this one to answer all the 'hacks' we do to deliver products with small teams....
Pretty slick and easy to navigate. No brainer.
Rely.io is ideal for engineering organizations looking to boost developer productivity and streamline DevOps workflows. However, potential users should be mindful of factors such as pricing transpa...
Related Comparisons
Frequently Asked Questions
Which is better, Radix UI or Rely.io?
Based on FactScore™, Rely.io leads with a score of 100.7 vs 69.9. Rely.io has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Radix UI compared to Rely.io?
Radix UI uniquely offers: Accessible UI components, Developer experience, Un-styled components, React compatibility, Community involvement.
What are the pros of Rely.io compared to Radix UI?
Rely.io uniquely offers: Easy to use, Internal developer portal, AI assistant, Boosts engineering productivity, Easy setup.
Is Radix UI better rated than Rely.io?
Radix UI is rated 5.0★ from 24 reviews. Rely.io is rated 5.0★ from 105 reviews.
What is the FactScore™ of Radix UI and Rely.io?
FactScore™ weighs rating and review volume together. Radix UI scores 69.9 and Rely.io scores 100.7.
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