Softwr

Developer Tools · head to head

Blacksmith vs Expo

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Rated
-
Full reviewWebsite
Expo logo

Expo

Mobile Development

React Native framework and cloud platform for building and shipping apps

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; Expo free tier build counts and MAU support are low, pushing active projects to paid plans quickly.
  • They diverge on capability: Blacksmith covers Bare metal runners, Expo covers Expo SDK.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Blacksmith and Expo actually diverge.

Attributes where Blacksmith and Expo differ
AttributeBlacksmithExpo
Pricing modelUnknownfreemium
PlatformsGitHub Actions, Linux, Windows, macOSweb, ios, android, api
CategoryDeveloper ToolsMobile 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 Expo

  • Expo SDK
  • EAS Build
  • EAS Submit
  • EAS Update
  • Expo Router
  • EAS Hosting
  • EAS Insights

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

Expo

  • Building cross-platform apps with React Native without native toolingnot Blacksmith
  • Running cloud builds and store submissions via EASnot Blacksmith
  • Shipping over-the-air updates to bypass app store reviewnot Blacksmith
  • Adding file-based navigation with Expo Routernot Blacksmith
  • Hosting companion web apps and APIsnot 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

Expo

  • Free tier build counts and MAU support are low, pushing active projects to paid plans quickly.
  • Usage-based overage charges for builds, CI/CD minutes, and MAUs can make costs less predictable.
  • Concurrent build limits on lower tiers slow down teams with frequent releases.
  • Some native functionality still requires ejecting to bare workflow or writing custom native modules.

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

Expo

Free
  • FreeFree
    • 15 Android and 15 iOS builds
    • Low-priority build queue
    • 60 minutes of CI/CD workflows
  • Starter$19/month
    • $45 build credit included
    • High-priority queue and large workers
    • 3,000 MAUs for updates
  • Production$199/month
    • $225 build credit included
    • 2 concurrent builds
    • 50,000 MAU support
  • Enterprise$undefined/month
    • $1,000 build credit included
    • 5 concurrent builds
    • 1M+ MAU 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 Expo if

  • You need expo sdk.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want eas build.
Expo review

Questions people ask

Is Blacksmith or Expo better?
Neither clearly leads. Blacksmith starts at Free and Expo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or Expo?
Blacksmith starts at Free and Expo at Free.
Does Blacksmith or Expo run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. Expo runs on web, ios, android, api.
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 Expo is typically brought in for.
What can Blacksmith do that Expo cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. Expo covers Expo SDK, EAS Build, EAS Submit, EAS Update.

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
Expo: What does Expo cost?

Expo offers a free plan, a Starter plan at $19/month with $45 build credit, a Production plan at $199/month with $225 build credit, and custom Enterprise pricing.

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

The Free plan includes 15 Android and 15 iOS builds, low-priority build queue access, 60 minutes of CI/CD workflows, and support for 1,000 monthly active users on updates.

Source
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
Expo: How is usage metered on paid plans?

Beyond included build credit, Expo charges per build by platform and worker size, per CI/CD workflow minute, per million Observe events, and graduated per-MAU overage rates for updates.

Source
Share

Related pages

More on Blacksmith

More on Expo

Keep looking

Other head to heads