Hi! I'm Caddie — your AI copilot for CAD.

Developer Alpha — Free

The AI copilot
inside SolidWorks.

Caddie lives inside your CAD software, reads your design in real time, and gives specific answers referencing your actual feature names, sketches, and mates. No copy-pasting. No tab switching.

✓ SolidWorks 2022+ ⌛ Fusion 360 — coming soon ⌛ Onshape — coming soon

⇓ Download Free See It In Action

Free during Alpha · v0.3 · Windows 10/11 64-bit

Try asking Caddie

"Why is my loft failing?" "Review this part before machining" "How do I mate for single-axis rotation?" "Walk me through CSWA prep on this sketch" "What does Boss-Extrude3 do?"

FlangeCouplingHub.sldprt

FlangeCouplingHub.SLDPRT · 18 features

Ask Caddie ready

FlangeCouplingHub.SLDPRT · 18 features

YOU

Review this flange hub before I send it for machining

CADDIE

2 issues found:
🔴 Boss-Extrude1 bore is ⌀22mm — shaft spec requires ⌀25mm
🟡 Fillet1 at hub-flange junction is R0.5mm — increase to R2.0mm for fatigue life

YOU

Fix the bore and update the fillet radius

FlangeCouplingHub.SLDPRT

Ask about your model…

Use Cases

See Caddie in action.

Real scenarios CAD engineers face every day.

🔧

Debugging

Stop searching forums.

Your sketch shows dangling relations after renaming a reference plane. Instead of searching StackOverflow for an hour, ask Caddie — it sees your feature tree and tells you exactly which relation to delete and what to replace it with.

My sketch has a dangling relation after I renamed Top Plane

In Boss-Extrude1 sketch, the coincident relation on line 3 references the old plane name. Right-click it → Delete Relation → re-add Coincident to Top Plane.

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Certification

Study with your model open.

Wherever you are — starting from scratch, preparing for CSWA, advancing to CSWP, tackling a CSWPA specialty, or aiming for CSWE — Caddie walks you through exercises step by step with your actual model in context. Works for every supported CAD platform.

I'm starting CSWA prep — what should I practice first?

Start with fully-defined sketches — they're the foundation of every CSWA question. Open a part, constrain a profile sketch, and I'll check your work as you go.

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Model Review

Catch issues before your supervisor does.

One click runs a full model review — rebuild errors, naming conventions, dangling references, and design intent issues — all prioritized by severity so you know what to fix first.

Review my model for issues before I send it to the team

3 issues found:
🔴 Sketch3 has external ref to deleted edge
🟡 5 features use default names (Extrude1…)
🟢 Configuration naming looks good

Why Caddie

Designed for how engineers actually work.

Three principles that most AI tools miss entirely.

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Context-Aware AI

Before answering, Caddie reads your feature tree, active configuration, selection state, rebuild errors, and takes a live viewport screenshot. Every answer references your actual model — not a textbook example.

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Always Up to Date

Caddie notifies you inside SolidWorks when a new version is ready. One download, ten seconds to apply — no re-registration needed. You never need to check a website.

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Clear About Your Data

History, notes and preferences stay on your PC, with no account, telemetry or analytics. To answer, Caddie sends your question, model details and a screenshot to OpenAI with storage turned off, and screenshots can be switched off.

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Smart Chat

Ask anything about your model. Caddie answers with specific references to your feature names, sketches, and mates.

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Practice Exams

CSWA, CSWP and sheet metal practice parts with a drawing and a timer. Caddie checks your answer against your model and tells you what to look at. Quick drills cover the other certifications.

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Teach Me From Image

Drop a screenshot of any model and Caddie generates a complete SolidWorks build plan.

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Persistent Memory

Caddie remembers your modeling style and project notes — all stored locally on your machine.

How It Works

Up and running in under 5 minutes.

Caddie runs entirely inside your CAD software as a native add-in. No browser, no copy-paste, no context switching.

Install the add-in

Run CaddieSetup.exe and click through the wizard. No account needed.

Open SolidWorks

Caddie appears automatically in the taskpane — no manual add-in steps required. Open any part, assembly, or drawing.

Ask anything

Type your question. Caddie responds with specific advice referencing your actual feature names, sketches, and mates.

Alpha Feedback

What engineers are saying.

"Caddie saved me 45 minutes on a loft failure I'd been fighting all morning. It saw exactly which sketch had the broken guide curve."

Marco R.

Mechanical Engineer · 8 yrs SW

"I'm studying for my CSWP and having an AI that can actually see my model is a completely different experience. It's like having a senior engineer on call."

Sarah T.

Design Engineer · CSWP candidate

"The model review caught a dangling reference I'd missed for two days. One click, instant answer, zero digging through the feature tree manually."

James K.

Product Designer · Manufacturing

Roadmap

What's shipping and what's next.

Done

M1 — Core: Add-in + Fast Context + Chat

Add-in loads, taskpane UI, fast context snapshot (doc + features + screenshot), AI chat with streaming.

Done

M2 — Deep Context + Model Review

Sketch diagnosis, mass properties, mates, equations, drawings, on-demand inspection tools, and an AI review with severity and fixes.

In testing

M3 — Caddie Does the Work

Fixes and modelling changes you approve with one click, with undo. Guided steps that highlight exactly where to click and tick themselves off. Live awareness of what you just did.

Soon

M4 — Full Memory System

Your standards and per-file notes (now in testing), then session summaries and searching past conversations.

Planned

M5 — Practice + Teach Me

Exam-style practice parts with checked answers (now in testing), image-based build plans, and a CSWE track.

Planned

M6 — Commercial Launch

Licensing system, optional cloud sync (opt-in), multi-provider AI support, code signing.

Privacy

What leaves your machine, and what doesn't.

Caddie is built for engineers who work on confidential designs, so here is exactly where your data goes.

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Stays on Your PC

Conversation history, file notes and preferences are stored on your PC. You can turn history off or delete it in Settings.

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Sent to Answer You

Your question, your model's details and a screenshot of SolidWorks go to OpenAI through Caddie's relay. Your files are never uploaded, and screenshots can be turned off.

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Not Used for Training

OpenAI doesn't train on API data, and Caddie asks it not to store conversations. OpenAI may keep requests for up to 30 days to check for abuse.

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No Telemetry

No account, usage tracking or analytics. Answers you rate stay on your PC unless you choose to send a problem report.

Read the full privacy details →

Developer Alpha · v0.3

Download Caddie

Ready to run inside SolidWorks 2022+. Run the installer, open SolidWorks, and you're working with Caddie in under 5 minutes.

⇓ Download CaddieSetup.exe

Free during alpha · Windows 10/11 64-bit · SolidWorks 2022+ · ~3.5 MB

Run CaddieSetup.exe and click through the setup wizard Windows may show a SmartScreen prompt — click "More info" then "Run anyway". The installer handles everything automatically.

Open SolidWorks — Caddie appears automatically in the taskpane The "Ask Caddie" panel appears on the right. Open any model and start chatting. To update later, just run the new installer — it upgrades automatically.

Full install guide →

The AI copilotinside SolidWorks.