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Blacksmith vs kind

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Rated
-
Full reviewWebsite
kind logo

kind

Cloud

Run Kubernetes clusters inside Docker containers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; kind requires Docker or Podman, so it inherits whatever container runtime limitations exist on the host
  • They diverge on capability: Blacksmith covers Bare metal runners, kind covers Nodes as containers.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Blacksmith and kind actually diverge.

Attributes where Blacksmith and kind differ
AttributeBlacksmithkind
Pricing modelUnknownOpen source, no licence fee
PlatformsGitHub Actions, Linux, Windows, macOSLinux, macOS, Windows
CategoryDeveloper ToolsCloud

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 kind

  • Nodes as containers
  • Multi-node topologies
  • CI-friendly
  • Local image loading

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

kind

  • Spinning up and destroying a Kubernetes cluster inside a CI jobnot Blacksmith
  • Testing controllers and operators against several Kubernetes versionsnot Blacksmith
  • Local multi-node clusters without the memory cost of virtual machinesnot 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

kind

  • Requires Docker or Podman, so it inherits whatever container runtime limitations exist on the host
  • Fewer conveniences than minikube: no addon system, so ingress and metrics need manual installation
  • Because nodes are containers sharing the host kernel, it is a weaker simulation of real node behaviour and storage

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

kind

Free
  • kindFree
    • 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 kind if

  • You need nodes as containers.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want multi-node topologies.
kind review

Questions people ask

Is Blacksmith or kind better?
Neither clearly leads. Blacksmith starts at Free and kind at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or kind?
Blacksmith starts at Free and kind at Free.
Does Blacksmith or kind run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. kind 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 kind is typically brought in for.
What can Blacksmith do that kind cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. kind covers Nodes as containers, Multi-node topologies, CI-friendly, Local image loading.

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
kind: Is kind free?

Yes, open source and maintained under Kubernetes SIGs.

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
kind: Why run Kubernetes nodes as containers?

Speed and cost. A container node starts in seconds and uses far less memory than a virtual machine, which is what makes per-CI-run clusters realistic.

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
kind: Is kind suitable for production?

No. It is a development and testing tool, and node isolation is weaker than real nodes because containers share the host kernel.

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