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Developer Tools · head to head

Blacksmith vs esbuild

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Rated
-
Full reviewWebsite
esbuild logo

esbuild

Web Development

Extremely fast JavaScript bundler written in Go

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; esbuild deliberately does not type-check TypeScript, only strips types, so tsc still runs separately
  • They diverge on capability: Blacksmith covers Bare metal runners, esbuild covers Very fast builds.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Blacksmith and esbuild actually diverge.

Attributes where Blacksmith and esbuild differ
AttributeBlacksmithesbuild
Pricing modelUnknownOpen source, no licence fee
PlatformsGitHub Actions, Linux, Windows, macOSLinux, macOS, Windows
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 esbuild

  • Very fast builds
  • TypeScript support
  • Tree shaking and minification
  • Simple API

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 esbuild
  • Accelerating CI build times for organizations with heavy CI loadnot esbuild
  • Reducing cloud spend on GitHub Actions by 60% or morenot esbuild
  • Supporting ARM architecture builds without GitHub runnersnot esbuild

esbuild

  • Build pipelines where bundle time is the bottlenecknot Blacksmith
  • Libraries and tools needing a fast, embeddable bundlernot Blacksmith
  • Replacing slower bundlers where the plugin ecosystem is not needednot 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

esbuild

  • Deliberately does not type-check TypeScript, only strips types, so tsc still runs separately
  • Plugin API is far narrower than webpack or Rollup, and complex builds hit its limits
  • Code splitting support has historically lagged the more established bundlers
  • Frequently used indirectly through Vite, so direct use is a narrower need than the download numbers suggest

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

esbuild

Free
  • esbuildFree
    • Full functionality
    • Commercial use permitted
    • 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 esbuild if

  • You need very fast builds.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want typescript support.
esbuild review

Questions people ask

Is Blacksmith or esbuild better?
Neither clearly leads. Blacksmith starts at Free and esbuild at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or esbuild?
Blacksmith starts at Free and esbuild at Free.
Does Blacksmith or esbuild run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. esbuild runs on Linux, macOS, Windows.
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 esbuild is typically brought in for.
What can Blacksmith do that esbuild cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. esbuild covers Very fast builds, TypeScript support, Tree shaking and minification, Simple API.

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
esbuild: Is esbuild 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
esbuild: Does esbuild type-check TypeScript?

No. It strips types for speed and does not check them. Run tsc separately if you need type checking.

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
esbuild: Do I need esbuild if I use Vite?

You already have it. Vite uses esbuild internally for dependency pre-bundling and transforms.

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