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Developer Tools · head to head

Blacksmith vs Womp

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Free plan
Yes
Visit BlacksmithFull review
Womp logo

Womp

Design

Browser 3D modelling built on blended implicit surfaces for non-specialists

From
Free
Free plan
Yes
Visit WompFull review

The short version

  • Blacksmith is a GitHub Actions runner service.
  • Womp is free; Blacksmith starts at $0.004/mo.
  • Only Blacksmith lists bare metal runners; only Womp lists implicit surface modelling.
  • Where Blacksmith falls short: per-minute pricing model requires estimating usage to predict costs.
  • Where Womp falls short: nothing is dimensionally accurate, so a form designed here has to be remodelled in CAD before it can be manufactured.
  • Prices and features on this page were last checked on 31 August 2026.

Where they differ

Only the attributes on which Blacksmith and Womp actually diverge.

Attributes where Blacksmith and Womp differ
AttributeBlacksmithWomp
PlatformsGitHub Actions, Linux, Windows, macOSWeb
CategoryDeveloper ToolsDesign

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: pricing model for Blacksmith.

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 Womp

  • Implicit surface modelling
  • Browser rendering
  • Material library
  • Scene sharing
  • Export
  • Templates

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

Womp

  • Producing 3D product or icon visuals in a design team with no 3D specialistnot Blacksmith
  • Making a set of consistent 3D illustrations for a website or campaign in a daynot Blacksmith
  • Prototyping a form quickly for discussion before it is remodelled properly in CADnot Blacksmith
  • Teaching 3D concepts without installing software on managed 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

Womp

  • Everything runs through the browser graphics stack, so an older laptop with integrated graphics hits frame rate and render limits fast and there is no local rendering fallback
  • Implicit modelling gives no control over the exported mesh, so the output topology is unsuitable for rigging, animation or subdivision work downstream
  • Nothing is dimensionally accurate, so a form designed here has to be remodelled in CAD before it can be manufactured
  • Scenes live in the vendor account, so if the service changes or closes, the only copies you hold are whatever you exported in advance
  • The material and lighting set is deliberately simplified, which caps art direction and makes the output visually recognisable as having come from Womp

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

Womp

Free
  • FreeOn request
    • Public scenes
    • Limited render resolution
    • Limited storage
  • ProOn request
    • Private scenes
    • Higher render resolution
    • Mesh export and larger storage

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 Womp if

  • You need implicit surface modelling.
  • You want to start without paying.
  • You also want browser rendering.
Womp review

Questions people ask

Is Blacksmith or Womp better?
Neither clearly leads. Blacksmith starts at Free and Womp at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or Womp?
Blacksmith starts at Free and Womp at Free.
Does Blacksmith or Womp run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. Womp 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 Womp is typically brought in for.
What can Blacksmith do that Womp cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. Womp covers Implicit surface modelling, Browser rendering, Material library, Scene sharing.

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
Womp: Do I need to know 3D to use it?

No. That is the point of the modelling approach; there is no topology, edge flow or subdivision to understand.

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
Womp: Can I use the meshes in Blender or a game engine?

You can export them, but the topology comes from tessellating an implicit surface, so it is not suitable for rigging, animation or subdivision without a retopology pass.

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
Womp: Is it accurate enough for manufacturing?

No. It is a visual tool. Anything to be made needs remodelling in CAD.

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