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Blacksmith vs Maestro

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Rated
-
Full reviewWebsite
Maestro logo

Maestro

Mobile Development

Open source mobile UI testing with YAML flows, and a cloud priced per concurrent device rather than per test minute

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; Maestro cloud pricing is per concurrent device at 250 USD per month, so the cost is driven by how quickly you need the suite to finish rather than by how much you test, and a team wanting a fast pull request gate buys several devices at once.
  • They diverge on capability: Blacksmith covers Bare metal runners, Maestro covers YAML test flows.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Blacksmith and Maestro actually diverge.

Attributes where Blacksmith and Maestro differ
AttributeBlacksmithMaestro
Pricing modelUnknownPer concurrent cloud device per month
PlatformsGitHub Actions, Linux, Windows, macOSiOS, Android, Web, macOS, Linux, Windows
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 Maestro

  • YAML test flows
  • Built-in flakiness tolerance
  • Maestro Studio
  • Open source CLI
  • Cloud device runs
  • CI and pull request integration

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

Maestro

  • A mobile team replacing an Appium suite that spends more engineering time on maintenance than on new coveragenot Blacksmith
  • Running smoke tests on every pull request without buying and maintaining a physical device labnot Blacksmith
  • Letting a QA specialist who does not write application code author and own the end-to-end suitenot Blacksmith
  • Reproducing a reported bug by recording the exact flow in Studio and committing it as a regression testnot 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

Maestro

  • Cloud pricing is per concurrent device at 250 USD per month, so the cost is driven by how quickly you need the suite to finish rather than by how much you test, and a team wanting a fast pull request gate buys several devices at once.
  • YAML is deliberately limited, so tests with real conditional logic or data-driven permutations end up in embedded scripting blocks where the readability advantage that justified the format disappears.
  • Maestro drives the app as a black box, so it cannot assert on internal state, mock a network layer from inside the process or inspect application memory the way an in-process framework can.
  • The hosted device catalogue is narrower than dedicated device clouds, so testing against a long tail of specific manufacturer builds and older operating system versions still requires another provider.
  • The project rebranded from mobile.dev to Maestro, so a share of existing tutorials, blog posts and links point at old domains and documentation that no longer match the current tooling.

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

Maestro

Free
  • LocalFree
    • Free and open source CLI
    • Maestro Studio, Viewer and MCP
    • Runs on your own simulators, emulators and devices
  • Cloud$250/month
    • Per device per month
    • Unlimited hosted test runs
    • Hosted Android, iOS and web devices
  • Enterprise Cloud$undefined/year
    • Quoted
    • SSO and dedicated support
    • Custom contracts

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 Maestro if

  • You need yaml test flows.
  • You want to start without paying.
  • You work on iOS, Android, Web, macOS, Linux, Windows.
  • You also want built-in flakiness tolerance.
Maestro review

Questions people ask

Is Blacksmith or Maestro better?
Neither clearly leads. Blacksmith starts at Free and Maestro at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or Maestro?
Blacksmith starts at Free and Maestro at Free.
Does Blacksmith or Maestro run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. Maestro runs on iOS, Android, Web, macOS, Linux, 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 Maestro is typically brought in for.
What can Blacksmith do that Maestro cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. Maestro covers YAML test flows, Built-in flakiness tolerance, Maestro Studio, Open source CLI.

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
Maestro: Is Maestro free?

The CLI, Studio and local execution are free and open source. The hosted device cloud is 250 USD per device per month.

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
Maestro: What exactly does per device mean?

It is a concurrency slot. One device runs one test at a time, so suite duration is a function of how many devices you buy.

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
Maestro: How does it compare with Appium?

Tests are YAML rather than code and flakiness handling is built in, which reduces maintenance, at the cost of lower-level control.

Maestro: Can it test web applications too?

Yes, the cloud offers hosted web devices alongside Android and iOS, though the product centre of gravity is mobile.

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