CAD · head to head
Inventor vs Zoo
Zoo
CAD
Cloud CAD with a scripting language and a geometry engine exposed as an API
- From
- Free
- Rated
- -
The short version
- Only Zoo has a free tier, so it costs nothing to try first.
- Each has a real cost: Inventor pricing shown as template variables on the page, suggesting dynamic or region-specific pricing; 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: Inventor covers Parametric modeling, Zoo covers KCL scripting.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Inventor and Zoo actually diverge.
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 Inventor
- Parametric modeling
- Assembly design
- Sheet metal
- Simulation
- Rendering
- Technical documentation
- Frame generator
- AutoCAD
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.
Inventor
- Mechanical designnot Zoo
- Product developmentnot Zoo
- Manufacturing documentationnot Zoo
Zoo
- A hardware startup that wants part models reviewed in pull requests alongside firmwarenot Inventor
- A software team generating thousands of parametric part variants programmatically rather than by handnot Inventor
- A SaaS product that needs to render and convert customer CAD files without licensing a geometry kernelnot Inventor
- An engineer who models occasional brackets and enclosures and does not want a four figure annual seatnot Inventor
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Inventor
- Pricing shown as template variables on the page, suggesting dynamic or region-specific pricing
- No clear pricing information readily available on the overview page
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
Inventor
$29/month- Inventor$2085/month
- Full mechanical design
- Simulation
- Documentation
- Product Design & Manufacturing Collection$2475/month
- Inventor + AutoCAD + more
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 Inventor if
- You need parametric modeling.
- You work on Windows.
- You also want assembly design.
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.
Questions people ask
- Is Inventor or Zoo better?
- Neither clearly leads. Inventor starts at $29/month and Zoo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Inventor or Zoo?
- Zoo has a free tier; the other does not. Paid plans start at $29/month for Inventor and Free for Zoo.
- Does Inventor or Zoo run on more platforms?
- Inventor 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. Inventor starts at $29/month.
- What is Inventor best used for?
- Inventor is most often used for mechanical design, product development, manufacturing documentation. Of those, mechanical design and product development are not what Zoo is typically brought in for.
- What can Inventor do that Zoo cannot?
- Inventor covers Parametric modeling, Assembly design, Sheet metal, Simulation. Zoo covers KCL scripting, Design Studio, Design API, Zookeeper agent.
Answered from the vendors’ own pages
Inventor: How much does Autodesk Inventor cost?
Autodesk Inventor pricing is not displayed on the overview page. Monthly and annual subscription options are available, including single-year and multi-year terms. Customers can access pricing through their Autodesk Account or contact sales.
SourceZoo: 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.
Inventor: Is there a free trial for Autodesk Inventor?
Yes, Autodesk offers a 30-day free trial of Inventor. You can start your project and try the software for free during this period.
SourceZoo: 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.
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