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Radix UI vs StackBlitz

Radix UI logo

Radix UI

Web Development

Unstyled, accessible React component primitives

From
Free
Free plan
Yes
Full reviewWebsite
StackBlitz logo

StackBlitz

Developer Tools

Browser-based IDE and AI app builder running full Node.js stacks via WebContainers

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Radix UI you write all the styling, so time to a finished interface is much longer than with a styled library; StackBlitz specific Teams and Enterprise pricing figures are not published; visitors must request a quote or infer from the pricing calculator.
  • They diverge on capability: Radix UI covers Unstyled primitives, StackBlitz covers WebContainers.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Radix UI and StackBlitz actually diverge.

Attributes where Radix UI and StackBlitz differ
AttributeRadix UIStackBlitz
Pricing modelOpen source, no licence feefreemium
CategoryWeb DevelopmentDeveloper Tools

Identical on both: starting price (Free), free tier (Yes), platforms (Web), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Radix UI

  • Unstyled primitives
  • Accessibility built in
  • Composable API
  • Controlled or uncontrolled

Only in StackBlitz

  • WebContainers
  • Bolt.new AI app builder
  • Instant boot times
  • GitHub project import
  • Team collaboration
  • Offline functionality

What people use each for

The jobs each tool is most often brought in to do.

Radix UI

  • Design systems that need correct accessibility without inherited visual opinionsnot StackBlitz
  • Replacing hand-built dropdowns and dialogs that have accessibility bugsnot StackBlitz
  • Teams with a designer whose output should not be constrained by a library’s themenot StackBlitz

StackBlitz

  • Editing a GitHub repository instantly in the browser without cloning itnot Radix UI
  • Generating a working web app from a text prompt with Bolt.newnot Radix UI
  • Sharing private projects across a team without individual GitHub seats for viewersnot Radix UI
  • Running lightweight Node.js projects with no local setupnot Radix UI

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Radix UI

  • You write all the styling, so time to a finished interface is much longer than with a styled library
  • Composable part-based APIs are more verbose than a single component with props
  • Covers primitives rather than complex widgets, so data grids and date pickers come from elsewhere

StackBlitz

  • Specific Teams and Enterprise pricing figures are not published; visitors must request a quote or infer from the pricing calculator.
  • Browser-based execution via WebContainers has limits on which native/binary dependencies can run compared to a real server-backed environment.
  • Heavy or resource-intensive workloads may be constrained by the end user's own browser and machine resources.

Pricing, plan by plan

Radix UI

Free
  • Radix UIFree
    • Full functionality
    • Commercial use permitted
    • Community support

StackBlitz

Free
  • PersonalFree
    • Unlimited public projects, collections, and GitHub repositories
    • View and edit without a GitHub account
  • Teams$undefined/mo
    • Private collections and repositories for paid members
    • Free and paid member roles
    • Automatic permission mirroring for org-owned repositories

Which should you pick?

Choose Radix UI if

  • You need unstyled primitives.
  • You want to start without paying.
  • You also want accessibility built in.
Radix UI review

Choose StackBlitz if

  • You need webcontainers.
  • You want to start without paying.
  • You work on web.
  • You also want bolt.new ai app builder.
StackBlitz review

Questions people ask

Is Radix UI or StackBlitz better?
Neither clearly leads. Radix UI starts at Free and StackBlitz at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Radix UI or StackBlitz?
Radix UI starts at Free and StackBlitz at Free.
Does Radix UI or StackBlitz run on more platforms?
Radix UI runs on Web. StackBlitz runs on web.
Can I use Radix UI for free?
Both have a free tier, so you can try either at no cost before committing.
What is Radix UI best used for?
Radix UI is most often used for design systems that need correct accessibility without inherited visual opinions, replacing hand-built dropdowns and dialogs that have accessibility bugs, teams with a designer whose output should not be constrained by a library’s theme. Of those, design systems that need correct accessibility without inherited visual opinions and replacing hand-built dropdowns and dialogs that have accessibility bugs are not what StackBlitz is typically brought in for.
What can Radix UI do that StackBlitz cannot?
Radix UI covers Unstyled primitives, Accessibility built in, Composable API, Controlled or uncontrolled. StackBlitz covers WebContainers, Bolt.new AI app builder, Instant boot times, GitHub project import.

Answered from the vendors’ own pages

Radix UI: Is Radix UI free?

Yes, open source under the MIT licence.

StackBlitz: Is there a free plan, and what are its limits?

Yes, the free Personal plan includes unlimited public StackBlitz projects, collections, and GitHub repositories, and lets anyone view and edit projects without needing a GitHub account.

Source
Radix UI: Why use unstyled components?

Because accessibility is the hard part and visual design is the part teams want to own. Radix gives the first and stays out of the second.

StackBlitz: What does the Teams plan add?

Teams lets GitHub organizations add free or paid members; paid members get access to private collections and repositories, with permissions mirrored from GitHub-owned repos.

Source
Radix UI: What is the relationship with shadcn/ui?

shadcn/ui is built on Radix primitives, adding Tailwind styling and copy-paste distribution on top.

StackBlitz: Is there an Enterprise option?

Yes, custom Enterprise plans are available and require contacting StackBlitz directly.

Source
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