Zoo
AI-native CAD software: Zookeeper turns plain-language prompts into editable B-rep parametric models in Zoo Design Studio.
Pick Zoo when concept iteration speed is the bottleneck and you need real parametric B-rep at the end, not a mesh you have to remodel. The ITAR-compliant US Regulated region plus an openly published SOC 2 Type II report and two Trail of Bits audits give it a credible story for defense and aerospace work that general-purpose cloud CAD can't match. Pass for now if you need FEA, simulation, or CAM inside the same tool — those live on Zoo's roadmap, not in the product.
Verified 2d ago · liveness 69/100 · cite: rightaichoice.com/tools/zoo
- Hardware startups iterating from rough concept to parametric CAD fast
- Mechanical engineers who want AI-assisted design that still produces a real feature tree
- Defense and aerospace teams needing ITAR-compliant US-hosted CAD
- Developers building generative CAD apps on the Engine, Agent, and File Format APIs
- Engineers who need built-in FEA, simulation, or analysis today
- Teams managing large production assemblies with hundreds of parts
- Anyone needing CAM toolpath generation in the same tool
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Skip Zoo if you need FEA, simulation, or CAM toolpaths inside the same tool today — Zoo's own roadmap lists Analyze and Manufacture as future stages, not shipped features.
Zookeeper reasoning in the studio and billable API activity (direct or via the Zoo MCP server) draw from the same monthly usage credit, so heavy API use eats the allowance you were counting on for in-studio design work.
Zoo's free Zookeeper tier makes it the cheapest credible way to test AI-native CAD before committing. It undercuts the established desktop incumbents on entry cost, but the moment you push billable API traffic or need SSO for SAML-based enterprise login you are comparing against enterprise CAD contracts, not a $20/mo seat.
In short
Zoo — AI-native CAD software: Zookeeper turns plain-language prompts into editable B-rep parametric models in Zoo Design Studio. Best for Hardware startups iterating from rough concept to parametric CAD fast, Mechanical engineers who want AI-assisted design that still produces a real feature tree, Defense and aerospace teams needing ITAR-compliant US-hosted CAD. Free to use.
No head-to-head comparison for Zoo yet — the alternatives below are the closest matches we list.
What's new in Zoo
Checked todayAcross the latest 3 updates: 1 launch and 2 news mentions.
Announcing KCL 3.0
Zoo shipped KCL 3.0, described as a more powerful version of its CAD language and engine.
Zoo Design Studio Makeathon winner: a 1636 clavichord built in KCL
Zoo's first Design Studio Makeathon winner turned a 1636 clavichord drawing into an editable parametric KCL model.
Zoo got audited by Trail of Bits (again)
Zoo published findings from its 2026 and 2024 Trail of Bits security audits.
What people actually say about Zoo — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
103 mentions across 6 sources (Hacker News, YouTube, Product Hunt, App Store, Stack Overflow, Lemmy) · researched Jul 31, 2026.
Average across the 6 sources that answered — each source counts once, not each post.
- +Conversational Zookeeper agent generates editable parametric models from natural language.
- +Image-to-CAD conversion saves time for concept exploration.
- +Combines AI, point-and-click, and code (KCL) for flexibility.
- +ITAR-compliant US cloud hosting with SOC 2 Type II certification.
- +Trail of Bits security audits show commitment to transparency.
- −Very little community feedback on actual AI/CAD performance.
- −App store reviews (if related) cite age-gating bugs locking users out.
- −Allegations of double-charging and account lockout in the app.
- −Learning curve: requires understanding KCL code and AI limitations.
- −Free tier may have limited features, hidden costs for export.
- • Potential export fees or credits for AI generation
- • Cloud compute costs for heavy AI use
- • Premium support may require enterprise plan
Viability Score
How well maintained and how widely used is Zoo? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Zookeeper conversational CAD agent that designs against real geometry
- Editable B-rep geometry with a parametric feature tree, not meshes
- Point-and-click CAD tools for sketching and modeling
- KCL (KittyCAD Language) scripting for parametric, auditable models
- Zoo MCP server so external agents can drive the design tool
- Image-to-CAD conversion through Zookeeper
- Surface modeling tools
- Redesigned sketch mode with flexible constraints, trim tool, and region detection
- Manufacturability checks for draft angles and wall thickness
- GD&T labels and pattern support
- Standard holes and extrude-to features
- STEP, IGES, and DXF export
- Browser-based editing via Try in Browser
- Desktop app for Mac, Windows, and Linux
- Engine API, Agent API, and File Format API for cloud-native geometry
About Zoo
Zoo Design Studio is an AI-native CAD environment for hardware design, built around Zookeeper, an engineering agent that works against real geometry instead of pixels or meshes. Describe the part you need and Zookeeper researches the problem, reasons through it, proposes constraints, and returns a fully editable B-rep model with a usable feature tree. From there you keep working the same file three ways: chat with Zookeeper, point-and-click CAD tools, or KCL (KittyCAD Language) for parametric logic you can audit and regenerate. The geometry stack is Zoo's own engine, exposed as Engine, Agent, and File Format APIs, so teams building generative CAD apps can call the same kernel the studio runs on. KCL scripting supports parametric, auditable models, and a Zoo MCP server lets other agents drive the tool. Recent releases added Image-to-CAD through Zookeeper and a redesigned sketch mode with more flexible constraints, a trim tool, and region detection from intersecting profiles — changes that matter because Zookeeper-generated geometry is only useful if you can still hand-edit it. The Aquarium gallery shows the range: an aerospace clevis bracket, a centrifugal pump volute casing, a high-pressure turbine blade, a Mars rover wheel, a six-axis welding robot, all openable and inspectable. Security is a real differentiator for regulated buyers. Zoo runs an ITAR-compliant US Regulated region on US-based cloud providers and publishes its SOC 2 Type II report openly at trust.zoo.dev. Trail of Bits audited Zoo in 2024 and again in 2026, with no critical findings in the 2026 pass. Software ships as a desktop app for Mac, Windows, and Linux, or in the browser via Try in Browser. Against Fusion 360 or SolidWorks, expect a smaller ecosystem and no built-in analysis or CAM today — Zoo's roadmap lists Analyze and Manufacture as the next stages, not current ones.
Behind the Verdict
Where Zoo earns its keep is the handoff between fast and precise. Zookeeper mocks something up from a sentence, then you switch into engineering mode and lock constraints down in KCL or with point-and-click tools. Randy Zwitch of Zwitch Guitars described exactly that loop, and it's the workflow most hardware teams actually want: throwaway speed early, auditability later. One thing to get right before you commit: Zookeeper minutes. On plans with an allowance, reasoning inside Zoo Design Studio and billable API activity — direct or through Zoo MCP — draw from the same monthly credit. Unlimited Zookeeper use in the studio does not make external API calls unlimited. If you're wiring an agent into a pipeline, model that usage separately or you'll be surprised. Sketch mode got a real upgrade in May 2026, with looser constraints, a trim tool, and region detection from intersecting profiles. That sounds incremental and isn't: if you can't cleanly edit what the agent produced, you've just moved the remodeling work later. Hands-on editors should test this before judging the AI output. For regulated work, the compliance picture is unusually transparent — a full SOC 2 Type II report at trust.zoo.dev with no forms, an ITAR-suitable US Regulated region, and Trail of Bits findings from 2024 and 2026 published in June 2026 with no critical issues. We'd still run our own review, but that's more disclosure than most cloud CAD vendors offer. Against Fusion 360 or SolidWorks, Zoo loses on ecosystem breadth and on analysis. There's no FEA or simulation to run in-app, and CAM toolpaths aren't there either. Zoo says Analyze and Manufacture are coming; until they ship, budget for a second tool. API and MCP teams should look closely. The Engine API, Agent API, and File Format API expose
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Real-world workflow fit
Concrete scenarios for the personas Zoo actually fits — and what changes day-one when you adopt it.
You describe a mounting bracket in Zookeeper, get an editable B-rep model back with a feature tree, then open KCL to parameterize the hole spacing and wall thickness before exporting STEP for your machine shop.
Outcome: A parametric part in an afternoon instead of a day of sketching, with every dimension still editable and auditable.
You wire the Agent API into your own application so end users can prompt for geometry, and use the File Format API to hand back STEP or IGES whichever the downstream tool expects.
Outcome: You ship AI CAD assistance without building a geometry kernel, and you can automate the same steps from CI with the Zoo CLI.
You host export-restricted geometry in Zoo's ITAR-compliant US Regulated region, verify the SOC 2 Type II report at trust.zoo.dev without a form, and review the Trail of Bits 2024 and 2026 audit findings before onboarding the team.
Outcome: Compliance review passes with published evidence rather than a vendor questionnaire.
Use Cases
- Generate an editable bracket from a natural-language description using Zookeeper
- Automate repetitive geometry tasks by scripting in KCL
- Convert a sketch or image into parametric CAD via Image-to-CAD
- Embed Zookeeper-style AI CAD assistance in your own app through the Agent API
- Convert between CAD file formats through the File Format API
- Run Zoo workflows from a terminal or CI pipeline with the Zoo CLI
- Iterate on a mechanical part by switching between point-and-click, KCL, and Zookeeper in one file
- Host export-restricted defense or aerospace geometry in an ITAR-compliant US region
Models Under the Hood
as of 2026-10-16
Limitations
- Zoo Design Studio is an AI-native CAD workspace where the Zookeeper conversational agent turns prompts into editable B-rep parametric models.
- Zoo's own homepage states that analysis and manufacturing are still upcoming stages ("Design is here.
- Analyze + Manufacture are next"), so in-product FEA, simulation, and CAM toolpaths are not available today.
- On plans with a Zookeeper minute allowance, reasoning in Zoo Design Studio and billable API activity (direct or via Zoo MCP) draw from the same monthly usage credit, so unlimited Zookeeper use inside the studio does not make external API activity unlimited; pay-as-you-go must be opted into and API pricing is separate.
as of 2026-10-09
Verification history
We have re-verified Zoo 20 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 20 verification passes.
Free to cite with attribution — this page re-verifies continuously.
Where the pricing makes sense
The company stage and team size where Zoo's pricing actually pencils out — and where peers do it cheaper.
Zoo's free Zookeeper tier makes it the cheapest credible way to test AI-native CAD before committing. It undercuts the established desktop incumbents on entry cost, but the moment you push billable API traffic or need SSO for SAML-based enterprise login you are comparing against enterprise CAD contracts, not a $20/mo seat.
Setup time & first value
How long it actually takes to get something useful out of Zoo — broken out by persona, not the marketing-page minute.
For an individual engineer: minutes — sign in, open Try in Browser or the Mac/Windows/Linux desktop app, and prompt Zookeeper. For a developer: under an hour to grab an API token from the docs and make a first Engine or Agent API call. For an enterprise rolling out SAML SSO and the ITAR US Regulated region: expect a normal procurement cycle driven by your own compliance review, not by the install.
Switching to or from Zoo
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Fusion 360 or SolidWorks: export STEP, then bring the geometry into Zoo Design Studio and rebuild parametric intent in KCL or the sketch tools — expect to redo constraints rather than inherit them.
- →From AutoCAD/DWG workflows: use the File Format API to convert formats, then rebuild the model in B-rep since DWG is 2D-centric.
- →From mesh-based AI CAD tools: import the reference and use Image-to-CAD through Zookeeper to get a real B-rep feature tree instead of a mesh.
- ↗To Fusion 360 or SolidWorks: export STEP or IGES from Zoo and rebuild the feature tree natively — the B-rep geometry carries over, the KCL parametric logic does not.
- ↗To a CAM or simulation tool: export STEP from Zoo and carry design intent into the downstream tool, since Zoo does not generate toolpaths today.
Integrations
Resources & Guides
- Resourcezoo.dev
Introducing Zoo
A look behind the scenes at why we are renaming the company Zoo.
- Resourcezoo.dev
Introducing Text-to-CAD
Introducing our machine learning model for generating CAD models from a text prompt.
- API Referencezoo.dev
Zoo
Start here to understand Zoo's APIs, choose the right surface, and make your first request.
Tutorials & Learning
YouTube returned 6 videos for “Zoo”, and we withheld 6: 6 could not be judged, because “Zoo” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about Zoo.
Official links
Tools that pair well with Zoo
Common stack mates teams adopt alongside Zoo, with the specific reason each pairing earns its keep.
Prompt2CAD
Prompt2CAD turns plain-English briefs and floor plans into real, editable parametric CAD models.
Text To Cad
Open-source agent skills that turn text or image prompts into CAD models, STEP files, G-code, and robot descriptions.
Image to Threejs
Browser workspace that turns 1–3 reference images into editable, previewable Three.js model code.
Alternatives to Zoo
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Prompt2CAD
Prompt2CAD turns plain-English briefs and floor plans into real, editable parametric CAD models.
Text To Cad
Open-source agent skills that turn text or image prompts into CAD models, STEP files, G-code, and robot descriptions.
Image to Threejs
Browser workspace that turns 1–3 reference images into editable, previewable Three.js model code.
Frequently Asked Questions
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