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Manufacturing · head to head

Protolabs vs SolveSpace

Protolabs logo

Protolabs

Manufacturing

Instant online quoting for machined, moulded, printed and sheet metal parts

From
On request
Rated
-
Full reviewWebsite
S

SolveSpace

CAD

Open source parametric CAD with a constraint solver in a few megabytes

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only SolveSpace has a free tier, so it costs nothing to try first.
  • Each has a real cost: Protolabs this is a manufacturing service, not software you licence, so comparing it with CAD or MES tools is a category error; the platform is free because the margin is in the parts.; SolveSpace the in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • They diverge on capability: Protolabs covers Instant CAD quoting, SolveSpace covers Constraint solver.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Protolabs and SolveSpace actually diverge.

Attributes where Protolabs and SolveSpace differ
AttributeProtolabsSolveSpace
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWeb, Cloud, APIWindows, macOS, Linux
CategoryManufacturingCAD

Identical on both: 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 Protolabs

  • Instant CAD quoting
  • Automated DFM feedback
  • CNC machining
  • Injection moulding
  • Industrial 3D printing
  • Sheet metal fabrication
  • Protolabs Network
  • Account tooling

Only in SolveSpace

  • Constraint solver
  • Solid modelling
  • Assemblies
  • Export formats
  • Cross-platform
  • Small footprint

What people use each for

The jobs each tool is most often brought in to do.

Protolabs

  • A product team needing five machined aluminium prototypes in hand this week to unblock a design reviewnot SolveSpace
  • A startup bridging to volume with an aluminium injection mould before committing to hardened production toolingnot SolveSpace
  • An engineer wanting manufacturability feedback on a part before sending it to an internal machine shopnot SolveSpace
  • A maintenance team ordering a one-off sheet metal bracket without opening a supplier accountnot SolveSpace

SolveSpace

  • Designing 3D printed parts on a machine that cannot run mainstream CADnot Protolabs
  • Teaching constraint-based parametric modelling without buying licences for a classroomnot Protolabs
  • Checking that a mechanical linkage moves as intended before cutting metalnot Protolabs
  • Producing dimensionally accurate STEP or STL output from a small open source toolchainnot Protolabs

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Protolabs

  • This is a manufacturing service, not software you licence, so comparing it with CAD or MES tools is a category error; the platform is free because the margin is in the parts.
  • Unit prices are well above a conventional job shop at volume, and past a few thousand parts a traditional supplier or an offshore moulder will beat it substantially.
  • The instant quoting engine only handles geometry it can analyse automatically; complex parts, unusual features or tight tolerances fall out to a manual quote and lose the speed advantage that justified the premium.
  • Material, finish and tolerance options are constrained to what the automated process supports, so designs needing a specific alloy temper or an unusual surface treatment are pushed to Protolabs Network and lose the one-day lead time.
  • Protolabs Network parts are made by third-party partners rather than in Protolabs own factories, so quality consistency and communication depend on which partner is allocated, and the buyer does not choose.

SolveSpace

  • The in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • There is no proper drawing and dimensioning workflow, so manufacturing documentation has to be produced in another application.
  • Development is volunteer-led and intermittent; long gaps between releases are normal and there is no support contract available at any price.
  • Assembly-level import of external CAD is very limited, so it does not fit a supply chain that exchanges native or assembly-level models with suppliers.
  • The interface follows its own conventions rather than mainstream CAD ones, so existing SolidWorks or Fusion users spend time unlearning habits for a tool with a lower ceiling.

Pricing, plan by plan

Protolabs

On request
  • Protolabs parts$undefined/month
    • The quoting platform itself is free to use with no subscription
    • Parts are priced per order from geometry, material, quantity and lead time
    • No minimum order quantity, including on injection moulding

SolveSpace

Free
  • SolveSpaceFree
    • Full application under the GPL
    • No seat limit
    • Windows, macOS and Linux builds

Which should you pick?

Choose Protolabs if

  • You need instant cad quoting.
  • You work on Web, Cloud, API.
  • You also want automated dfm feedback.
Protolabs review

Choose SolveSpace if

  • You need constraint solver.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want solid modelling.
SolveSpace review

Questions people ask

Is Protolabs or SolveSpace better?
Neither clearly leads. Protolabs starts at On request and SolveSpace at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Protolabs or SolveSpace?
SolveSpace has a free tier; the other does not. Paid plans start at On request for Protolabs and Free for SolveSpace.
Does Protolabs or SolveSpace run on more platforms?
Protolabs runs on Web, Cloud, API. SolveSpace runs on Windows, macOS, Linux.
Can I use SolveSpace for free?
Yes. SolveSpace has a free tier, so you can try it without paying. Protolabs starts at On request.
What is Protolabs best used for?
Protolabs is most often used for a product team needing five machined aluminium prototypes in hand this week to unblock a design review, a startup bridging to volume with an aluminium injection mould before committing to hardened production tooling, an engineer wanting manufacturability feedback on a part before sending it to an internal machine shop, a maintenance team ordering a one-off sheet metal bracket without opening a supplier account. Of those, a product team needing five machined aluminium prototypes in hand this week to unblock a design review and a startup bridging to volume with an aluminium injection mould before committing to hardened production tooling are not what SolveSpace is typically brought in for.
What can Protolabs do that SolveSpace cannot?
Protolabs covers Instant CAD quoting, Automated DFM feedback, CNC machining, Injection moulding. SolveSpace covers Constraint solver, Solid modelling, Assemblies, Export formats.

Answered from the vendors’ own pages

Protolabs: Is Protolabs software or a service?

A service. The online quoting platform is free software wrapped around a parts business; you cannot licence the platform on its own.

SolveSpace: Is it really free for commercial work?

Yes. It is released under the GPL with no licence fee and no seat limit. Support is community only.

Protolabs: What does the quoting platform cost?

Nothing. You pay only for parts you order.

SolveSpace: Can it replace Fusion 360 or SolidWorks?

No. It handles parts and simple assemblies well. Complex geometry, drawings and supply chain interoperability are outside its range.

Protolabs: Is there a minimum order?

No minimum order quantity, including injection moulding, where a single-cavity aluminium tool can produce a handful of parts.

SolveSpace: What hardware does it need?

Very little. It runs on old laptops and small Linux machines where mainstream CAD will not start.

Protolabs: When should I stop using Protolabs?

Once volumes are stable and in the thousands. At that point hard tooling with a conventional moulder or a job shop is materially cheaper per part.

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