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Blacksmith vs Chakra UI

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Free plan
Yes
Full reviewWebsite
Chakra UI logo

Chakra UI

Web Development

Accessible React component library with a style-props API

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; Chakra UI style props put styling in the component tree, which some teams find harder to scan than stylesheets
  • They diverge on capability: Blacksmith covers Bare metal runners, Chakra UI covers Style props.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Blacksmith and Chakra UI actually diverge.

Attributes where Blacksmith and Chakra UI differ
AttributeBlacksmithChakra UI
Pricing modelUnknownOpen source, no licence fee
PlatformsGitHub Actions, Linux, Windows, macOSWeb
CategoryDeveloper ToolsWeb Development

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 Blacksmith

  • Bare metal runners
  • Multiple OS support
  • ARM support
  • Docker layer caching
  • Sticky disks
  • GitHub Actions observability
  • Free tier
  • Static IPs

Only in Chakra UI

  • Style props
  • Accessible defaults
  • Theme system
  • Composable primitives

What people use each for

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

Blacksmith

  • Replacing GitHub Actions runners with faster, cheaper infrastructurenot Chakra UI
  • Accelerating CI build times for organizations with heavy CI loadnot Chakra UI
  • Reducing cloud spend on GitHub Actions by 60% or morenot Chakra UI
  • Supporting ARM architecture builds without GitHub runnersnot Chakra UI

Chakra UI

  • React applications wanting accessible components without Material Design’s looknot Blacksmith
  • Teams who find unstyled primitives too much work but styled libraries too opinionatednot Blacksmith
  • Rapid internal tools where a coherent theme matters more than a bespoke designnot Blacksmith

Where each one falls short

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

Blacksmith

  • Per-minute pricing model requires estimating usage to predict costs
  • macOS M4 pricing ($0.08/min) is significantly higher than GitHub Actions
  • Docker layer caching and sticky disks are paid add-ons at $0.50/GB/mo
  • Static IP add-on costs $100/IP/mo

Chakra UI

  • Style props put styling in the component tree, which some teams find harder to scan than stylesheets
  • Runtime CSS-in-JS has a performance cost, and it interacts awkwardly with React server components
  • Fewer complex widgets than MUI: no comparable data grid or date picker
  • Major version changes have altered the styling approach, making upgrades non-trivial

Pricing, plan by plan

Blacksmith

Free
  • Ubuntu x64$0.004/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • Ubuntu ARM$0.0025/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • Windows x64$0.008/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • macOS M4$0.08/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads

Chakra UI

Free
  • Chakra UIFree
    • Full functionality
    • No usage limits
    • Community support

Which should you pick?

Choose Blacksmith if

  • You need bare metal runners.
  • You want to start without paying.
  • You work on GitHub Actions, Linux, Windows, macOS.
  • You also want multiple os support.
Blacksmith review

Choose Chakra UI if

  • You need style props.
  • You want to start without paying.
  • You also want accessible defaults.
Chakra UI review

Questions people ask

Is Blacksmith or Chakra UI better?
Neither clearly leads. Blacksmith starts at Free and Chakra UI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or Chakra UI?
Blacksmith starts at Free and Chakra UI at Free.
Does Blacksmith or Chakra UI run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. Chakra UI runs on Web.
Can I use Blacksmith for free?
Both have a free tier, so you can try either at no cost before committing.
What is Blacksmith best used for?
Blacksmith is most often used for replacing github actions runners with faster, cheaper infrastructure, accelerating ci build times for organizations with heavy ci load, reducing cloud spend on github actions by 60% or more, supporting arm architecture builds without github runners. Of those, replacing github actions runners with faster, cheaper infrastructure and accelerating ci build times for organizations with heavy ci load are not what Chakra UI is typically brought in for.
What can Blacksmith do that Chakra UI cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. Chakra UI covers Style props, Accessible defaults, Theme system, Composable primitives.

Answered from the vendors’ own pages

Blacksmith: How much do Blacksmith runners cost compared to GitHub Actions?

Blacksmith offers 60-75% cost savings depending on OS. Ubuntu x64 costs $0.004/min vs GitHub at $0.012/min. All plans include 3,000 free minutes monthly.

Source
Chakra UI: Is Chakra UI free?

Yes, open source under the MIT licence.

Blacksmith: Can I use Docker layer caching with Blacksmith?

Yes, Docker layer caching is available as an add-on at $0.50/GB/mo. Managed Docker layer persistence is included with the base service.

Source
Chakra UI: Chakra UI or MUI?

MUI has more components including advanced data grids, but carries Material Design opinions. Chakra is lighter on visual opinion and easier to theme, with a smaller component set.

Blacksmith: What is the SLA for Enterprise plans?

Enterprise Blacksmith plans include a 99.9% SLA guarantee along with 24/7 priority support, dedicated Slack channels, white-glove onboarding, and CI optimization support.

Source
Chakra UI: Does Chakra handle accessibility?

Yes, components implement WAI-ARIA patterns by default, which is one of its stated design goals.

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