21st.dev
Create, remix and share UI components with AI
Astro
The web framework that scales with you.
Updated June 2026
| 21st.dev | Astro | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 6 | 44 |
| Pros | 6 | 19 |
| FactScore™ | 42.3 | 82.7 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in 21st.dev — Pros
UI component marketplace 3D components Actionable insights Centralized UI components Easy integration Free componentsBoth tools — Pros
—Only in Astro — Pros
Fast performance Excellent developer experience Static site generation Easy setup Easy to learn Content-driven websites Flexible deployment Island architecture Lightweight build Markdown support Starlight theme Templates availability Zero JS by default Full-stack development Modular architecture Partial hydration Supports multiple frameworks View transitions Vite coreOnly in 21st.dev — Cons
—Both tools — Cons
—Only in Astro — Cons
—Details
| 21st.dev | Astro | |
|---|---|---|
| Categories | Website builders, No-code Platforms | Website builders, Static site generators |
| Platforms | Web | Web |
| Added | January 7, 2025 | November 8, 2022 |
| Website | 21st.dev | astro.build |
Who Should Pick Which?
Choose 21st.dev if...
- UI component marketplace
- 3D components
- Actionable insights
Choose Astro if...
- Fast performance
- Excellent developer experience
- Static site generation
With a FactScore™ of 42.3 vs 82.7, Astro leads in community reception. 21st.dev uniquely offers UI component marketplace and 3D components, while Astro stands out for Fast performance and Excellent developer experience.
What Users Say
21st.dev
Looks like a practical tool for speeding up UI development, especially when working with AI-driven apps. It’s helpful to have ready-to-use components instead of building everything from scratch. Ar...
This definitely simplifies the workflow for frontend developers. Having a centralized space for high-quality UI components saves a lot of time compared to searching for scattered solutions. Curious...
This feels like a great way to cut down on repetitive design work. I wonder how it handles versioning when components get updated.
Astro
I've used many content-driven web frameworks, but Astro is the one that hits the sweet spot for me. Not only is it very easy to use, but it also includes everything I need to create a blog or a lan...
I wanted a way to make Blankie a great website without a lot of upkeep, and Astro delivered. The Vite core underneath it all generates such a clean static site and I'm thrilled that the site is 100...
Our UI framework for a fast, minimal JS experience. Astro’s island architecture lets us ship a responsive dashboard with React where it counts, and static where it’s best perfect for an ops heavy t...
Related Comparisons
Frequently Asked Questions
Which is better, 21st.dev or Astro?
Based on FactScore™, Astro leads with a score of 82.7 vs 42.3. Astro has a higher rating of 5.0★ compared to 5.0★.
What are the pros of 21st.dev compared to Astro?
21st.dev uniquely offers: UI component marketplace, 3D components, Actionable insights, Centralized UI components, Easy integration.
What are the pros of Astro compared to 21st.dev?
Astro uniquely offers: Fast performance, Excellent developer experience, Static site generation, Easy setup, Easy to learn.
Is 21st.dev better rated than Astro?
21st.dev is rated 5.0★ from 6 reviews. Astro is rated 5.0★ from 44 reviews.
What is the FactScore™ of 21st.dev and Astro?
FactScore™ weighs rating and review volume together. 21st.dev scores 42.3 and Astro scores 82.7.
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