SolidWorks Alternatives (2026): 10 CAD Tools Compared

SolidWorks has been the default in a lot of engineering workshops for years, but it's a big desktop package that runs on Windows only. If you're designing brackets for a small product business, or you want CAD on a Mac or in a browser, you've got more choice than you might think.

Here are ten SolidWorks alternatives in no particular order, sorted alphabetically, from free open-source tools to established professional suites. Each description comes from the vendor's own website, re-checked today. If your work is more about tidy processes than geometry, my piece on how the right software helps a business is a useful wider read.

Start with the files. If your clients and suppliers send STEP files, almost any modern CAD tool will open them. If they send native SolidWorks parts with full feature history, you'll want to test that import carefully before you switch.

Then think about where you work. Desktop CAD needs a capable computer, while browser-based CAD runs on almost anything with a good connection.

SolidWorks alternatives at a glance

In the free plan column, Yes means the tool's own site describes a free version, free plan or open-source download, Trial only means a time-limited trial, and No means neither is stated. Free versions often come with limits, so check what's included before you rely on one.

Tool	Type	Good for	Free plan
Alibre Design	Desktop parametric CAD	Small engineering firms	Trial only
Dune 3D	Open-source 3D CAD	Simple parametric parts	Yes
FreeCAD	Open-source parametric CAD	Free full-featured modelling	Yes
IronCAD	Desktop 3D CAD	Drag-and-drop design	Trial only
KeyCreator	Direct modelling CAD	Editing imported models	No
Onshape	Cloud CAD	Teams sharing designs	Yes
Shapr3D	Tablet and desktop CAD	Sketching on iPad	Yes
Siemens NX	Enterprise CAD and CAM	Complex manufacturing	Trial only
SolveSpace	Open-source constraint CAD	Lightweight 2D and 3D parts	Yes
ZW3D	Integrated CAD and CAM	Mould and tooling design	Trial only

Ten SolidWorks alternatives to consider

Alibre Design

Best for: Small engineering businesses that want parametric parts, assemblies and drawings on a Windows desktop.

Dune 3D

Best for: Makers who want a small, free and open-source parametric modeller for straightforward parts.

FreeCAD

Best for: Hobbyists and engineers who want a free parametric modeller with workbenches for parts, assemblies and drawings.

IronCAD

Best for: Designers who like building parts by dragging shapes, with history-free and parametric options.

KeyCreator

Best for: Engineers who mostly edit imported geometry and want direct modelling without feature trees.

Onshape

Best for: Teams who want CAD in the browser with built-in version control and real-time collaboration.

Shapr3D

Best for: Designers who want to model on an iPad with a pencil as well as on Mac and Windows.

Siemens NX

Best for: Larger manufacturers who need advanced design, simulation and machining in one enterprise suite.

SolveSpace

Best for: Makers who want a tiny, free constraint-based modeller for simple mechanical parts.

ZW3D

Best for: Product and tooling teams who want design and machining tools in the same desktop package.

The free CAD plan that makes your designs public

Here's a catch worth knowing before you sign up for a free cloud CAD account. Onshape's own plans page lists its Free plan as best for personal projects, with unlimited public storage. In other words, what you design on the free plan isn't private, and it's meant for non-commercial work.

That's fine for learning or a hobby project. It isn't fine for a client's product before launch. If the design is confidential, plan for a private plan or a desktop tool that keeps files on your own drive.

What to check before you leave SolidWorks

• File exchange: clean STEP and IGES import and export, plus DXF for laser cutting.
• Assemblies: how well it handles mates, motion and large assemblies.
• Drawings: 2D drawings with dimensions and tolerances your workshop can use.
• Platform: Windows, Mac, iPad or browser.
• Learning: tutorials and a community that answers questions.

A simple way to test a new CAD tool

1. Pick one real part you've already made.
2. Rebuild it from scratch in the new tool.
3. Import the same part as a STEP file and make one edit.
4. Produce a drawing and send it to whoever makes your parts.
5. Only move live projects once all four steps feel comfortable.

CAD switching mistakes to avoid

• Converting every old file at once. Convert parts as you need them.
• Skipping the drawing test. Your supplier reads drawings, not models.
• Ignoring licence terms. Hobby licences often rule out commercial client work.
• No backup format. Keep STEP copies of everything.

If you're building a small product business around your designs, my guide to streamlining small business operations covers the admin side.

Questions to ask a CAD vendor before you commit

A short call or a trial chat can save you months of frustration. These are the questions I'd want answered before moving real design work across.

• Can I export everything to STEP, IGES and DXF if I leave?
• How are licences tied to computers or users?
• Which file versions from my current tool will import cleanly?
• Is commercial use allowed on the plan I'm looking at?
• Where can I get help when I'm stuck on a model at night?

If the answers are vague, treat that as an answer too. Good CAD vendors are used to these questions and answer them plainly.

Do you make CAD and 3D design tools? Tool makers can ask to be considered for a featured place on this list.

My plain advice on SolidWorks alternatives

Don't switch CAD in the middle of a product launch. Change at the start of a new project, so a slow first week doesn't hold anything up.

And keep one neutral file format in your workflow. If every part also lives as a STEP file, you're never locked into a single program.

Frequently asked questions

What's the best free alternative to SolidWorks?

Open-source parametric modellers are the usual free option, and they handle parts, assemblies and drawings.

Can I open SolidWorks files in other CAD programs?

Many can import them, but feature history often doesn't survive. STEP files travel best.

Is there a SolidWorks alternative for Mac?

Yes. Several tools run natively on Mac, and browser-based CAD runs on any computer.

Is cloud CAD safe for client work?

It can be, but check the plan. Some free plans make your documents public.

What's parametric modelling?

It means your design is driven by dimensions and constraints, so changing one number updates the model.

What's direct modelling?

You push and pull faces directly instead of editing a feature history. It's handy for imported parts.

Do I need a powerful computer for CAD?

Desktop CAD likes a good graphics card. Browser CAD needs less from your machine.

Can I make 2D drawings in these tools?

Most can produce dimensioned drawings for workshops and suppliers.

Which CAD tool is good for 3D printing?

Any tool that exports STL or 3MF files works for 3D printing.

How long does it take to learn a new CAD program?

If you know CAD already, expect a few weeks to feel quick again.

Can students get CAD for free?

Several vendors offer free education licences. Check each one's terms.

Should I keep SolidWorks files after switching?

Yes. Export everything to STEP as well, so you can always reopen your work.

Can I run CAD in a web browser?

Yes. Browser-based CAD works on most computers, though complex assemblies still like a fast connection and a decent machine.