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Developer Tools · head to head

Earthly vs Radix UI

Earthly logo

Earthly

Developer Tools

Engineering guardrails for the AI era

From
Free
Free plan
Yes
Full reviewWebsite
Radix UI logo

Radix UI

Web Development

Unstyled, accessible React component primitives

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Earthly pricing model not published; requires sales contact; Radix UI you write all the styling, so time to a finished interface is much longer than with a styled library
  • They diverge on capability: Earthly covers Policy as code, Radix UI covers Unstyled primitives.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where Earthly and Radix UI differ
AttributeEarthlyRadix UI
Pricing modelNo pricing published on websiteOpen source, no licence fee
PlatformsWeb, CLIWeb
CategoryDeveloper ToolsWeb Development
Founded2020Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Earthly

  • Policy as code
  • Multi-stage enforcement
  • AI agent governance
  • Repository-wide policies
  • Incident response automation
  • Compliance management
  • Earthfiles build tool
  • Satellites

Only in Radix UI

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

What people use each for

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

Earthly

  • Enforcing engineering standards across AI and human developersnot Radix UI
  • Automating incident response procedures across all repositoriesnot Radix UI
  • Embedding compliance requirements into development workflowsnot Radix UI
  • Standardizing build processes with Earthfilesnot Radix UI

Radix UI

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

Where each one falls short

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

Earthly

  • Pricing model not published; requires sales contact
  • Earthly Lunar is a recent launch (2025) with limited track record
  • Primarily GitHub-focused; limited integration with other platforms
  • No public documentation on pricing or feature tiers

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

Pricing, plan by plan

Earthly

Free

No published plan breakdown. See the Earthly review.

Radix UI

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

Which should you pick?

Choose Earthly if

  • You need policy as code.
  • You want to start without paying.
  • You work on Web, CLI.
  • You also want multi-stage enforcement.
Earthly review

Choose Radix UI if

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

Questions people ask

Is Earthly or Radix UI better?
Neither clearly leads. Earthly starts at Free and Radix UI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Earthly or Radix UI?
Earthly starts at Free and Radix UI at Free.
Does Earthly or Radix UI run on more platforms?
Earthly runs on Web, CLI. Radix UI runs on Web.
Can I use Earthly for free?
Both have a free tier, so you can try either at no cost before committing.
What is Earthly best used for?
Earthly is most often used for enforcing engineering standards across ai and human developers, automating incident response procedures across all repositories, embedding compliance requirements into development workflows, standardizing build processes with earthfiles. Of those, enforcing engineering standards across ai and human developers and automating incident response procedures across all repositories are not what Radix UI is typically brought in for.
What can Earthly do that Radix UI cannot?
Earthly covers Policy as code, Multi-stage enforcement, AI agent governance, Repository-wide policies. Radix UI covers Unstyled primitives, Accessibility built in, Composable API, Controlled or uncontrolled.

Answered from the vendors’ own pages

Earthly: What is the difference between Earthfiles and Earthly Lunar?

Earthfiles is an open-source build tool that reached 12,000 GitHub stars and is used by companies like NVIDIA, Intel, and Databricks. Earthly Lunar is a separate governance platform launched in 2025 for enforcing standards across development workflows.

Source
Radix UI: Is Radix UI free?

Yes, open source under the MIT licence.

Earthly: How does Earthly Lunar enforce standards?

Lunar converts engineering standards, compliance requirements, and processes documented in AGENTS.md files, wikis, and incident postmortems into enforceable guardrails that apply consistently across repositories and development stages.

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.

Earthly: What is the pricing for Earthly Lunar?

Pricing is not published on the website. Interested customers should contact Earthly's sales team for current pricing and feature tiers.

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.

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