Is IronCAD or Zoo better?

Neither clearly leads. IronCAD starts at $3500/one-time and Zoo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, IronCAD or Zoo?

Zoo has a free tier; the other does not. Paid plans start at $3500/one-time for IronCAD and Free for Zoo.

Does IronCAD or Zoo run on more platforms?

IronCAD runs on Windows. Zoo runs on Web, Windows, macOS, Linux, API.

Can I use Zoo for free?

Yes. Zoo has a free tier, so you can try it without paying. IronCAD starts at $3500/one-time.

What is IronCAD best used for?

IronCAD is most often used for product development, machine design, tooling design, rapid prototyping. Of those, product development and machine design are not what Zoo is typically brought in for.

What can IronCAD do that Zoo cannot?

IronCAD covers Hybrid parametric/direct modeling, Drag-and-drop design, Multi-body assemblies, Sheet metal tools. Zoo covers KCL scripting, Design Studio, Design API, Zookeeper agent.

CAD · head to head

IronCAD vs Zoo

IronCAD

CAD

Innovative 3D design software with drag-and-drop simplicity

From: $3500/one-time
Rated: -

Full review Website

Zoo

CAD

Cloud CAD with a scripting language and a geometry engine exposed as an API

From: Free
Rated: -

Full review Website

The short version

Only Zoo has a free tier, so it costs nothing to try first.
Each has a real cost: IronCAD pricing page not found; Zoo the geometry engine runs entirely in Zoo's cloud and there is no offline mode, so an aircraft, a customer site with no guest wifi or an outage stops modelling work completely.
They diverge on capability: IronCAD covers Hybrid parametric/direct modeling, Zoo covers KCL scripting.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which IronCAD and Zoo actually diverge.

Attributes where IronCAD and Zoo differ
Attribute	IronCAD	Zoo
Starting price	$3500/one-time	Free
Pricing model	one-time	Per user per month
Free tier	No	Yes
Platforms	Windows	Web, Windows, macOS, Linux, API
Founded	1998	Unknown

Identical on both: user rating (Not yet rated), category (CAD).

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 IronCAD

Hybrid parametric/direct modeling
Drag-and-drop design
Multi-body assemblies
Sheet metal tools
2D drafting
STEP
IGES
Parasolid

Only in Zoo

KCL scripting
Design Studio
Design API
Zookeeper agent
Format conversion
Open source client

What people use each for

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

IronCAD

Product developmentnot Zoo
Machine designnot Zoo
Tooling designnot Zoo
Rapid prototypingnot Zoo

Zoo

A hardware startup that wants part models reviewed in pull requests alongside firmwarenot IronCAD
A software team generating thousands of parametric part variants programmatically rather than by handnot IronCAD
A SaaS product that needs to render and convert customer CAD files without licensing a geometry kernelnot IronCAD
An engineer who models occasional brackets and enclosures and does not want a four figure annual seatnot IronCAD

Where each one falls short

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

IronCAD

pricing page not found

Zoo

The geometry engine runs entirely in Zoo's cloud and there is no offline mode, so an aircraft, a customer site with no guest wifi or an outage stops modelling work completely.
STEP and SLDPRT import are still labelled experimental, which means the most common way of receiving a supplier or customer model is the least reliable path into the tool.
Drawing production, GD&T and tolerance annotation are far behind SolidWorks, Creo and NX, so most users still need a second package to release a manufacturing drawing.
Zookeeper is billed in reasoning minutes rather than per seat, so a team cannot forecast next month's bill from headcount the way it can with conventional CAD subscriptions.
The open source label applies only to the Design Studio client; the kernel that does the modelling is closed and hosted, so forking the repository does not give you a product you can run yourself.

Pricing, plan by plan

IronCAD

$3500/one-time

IronCAD Design Collaboration Suite$3500/one-time
- Full parametric and direct modeling
- Drag-and-drop design
- Multi-format CAD import/export
IronCAD Ultimate$6000/one-time
- All Design Suite features
- Advanced simulation
- Rendering tools

Zoo

Free

FreeFree
- Design Studio access
- About 20 minutes of Zookeeper reasoning per month
- Around $10 of API calls included
Plus$20/month
- Roughly 400 Zookeeper minutes per month
- Pay as you go beyond the allowance
- Design Studio and API access
Pro$99/month
- Unlimited Zookeeper reasoning
- Higher API allowance
- Priority support

Which should you pick?

Choose IronCAD if

You need hybrid parametric/direct modeling.
You work on Windows.
You also want drag-and-drop design.

IronCAD review

Choose Zoo if

You need kcl scripting.
You want to start without paying.
You work on Web, Windows, macOS, Linux, API.
You also want design studio.

Zoo review

Questions people ask

Is IronCAD or Zoo better?: Neither clearly leads. IronCAD starts at $3500/one-time and Zoo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IronCAD or Zoo?: Zoo has a free tier; the other does not. Paid plans start at $3500/one-time for IronCAD and Free for Zoo.
Does IronCAD or Zoo run on more platforms?: IronCAD runs on Windows. Zoo runs on Web, Windows, macOS, Linux, API.
Can I use Zoo for free?: Yes. Zoo has a free tier, so you can try it without paying. IronCAD starts at $3500/one-time.
What is IronCAD best used for?: IronCAD is most often used for product development, machine design, tooling design, rapid prototyping. Of those, product development and machine design are not what Zoo is typically brought in for.
What can IronCAD do that Zoo cannot?: IronCAD covers Hybrid parametric/direct modeling, Drag-and-drop design, Multi-body assemblies, Sheet metal tools. Zoo covers KCL scripting, Design Studio, Design API, Zookeeper agent.

Answered from the vendors’ own pages

IronCAD: Where can I find IronCAD pricing?

IronCAD's pricing page is not available. Contact IronCAD directly through their website for CAD software licensing and pricing information.

Source

Zoo: Is Zoo the same company as KittyCAD?

Yes. KittyCAD renamed itself Zoo; the GitHub organisation is still KittyCAD and the scripting language KCL keeps the old initials.

Zoo: Can I use Zoo without an internet connection?

No. The geometry engine is a cloud service, so Design Studio needs a live connection to model anything.

Zoo: Is Design Studio free?

There is a genuine free tier with a small monthly allowance of AI reasoning and API calls. Paid plans start at $20 per month.

Zoo: Can I replace SolidWorks with Zoo?

Not for drawing release, large assemblies or GD&T. Teams typically use Zoo for programmatic part generation and keep an established package for production documentation.

IronCAD vs Zoo

IronCAD

Zoo

The short version

Where they differ

What each one covers

Only in IronCAD

Only in Zoo

What people use each for

IronCAD

Zoo

Where each one falls short

IronCAD

Zoo

Pricing, plan by plan

IronCAD

Zoo

Which should you pick?

Choose IronCAD if

Choose Zoo if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on IronCAD

More on Zoo

Keep looking

Other head to heads