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LAD (Language-Aided Designer)

A SolidWorks add-in to design with natural language using AI

Download for Windows
Backed by Y Combinator
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Describe your design in plain language and LAD will translate it into
SolidWorks operations, creating sketches, features, and assemblies
all through natural conversation. LAD uses screenshots and the
feature tree to understand your model's current state, verifying
operations were completed correctly and correcting mistakes.

LAD visual context with screenshots and feature tree analysis

Design from Documentation and Images

Provide documentation files, images, or examples of previous parts
and assemblies, and LAD will intelligently read and use them.

LAD macro writing and execution

Write and Run Macros

LAD can write and run VBA macros for reproducibility and niche
functionality not covered by standard LAD tools. When writing macros,
LAD searches SolidWorks documentation and examples to better
understand the API.

LAD complete SolidWorks API integration

Permissioning and Versioning

LAD stores checkpoints so you can revert unwanted changes, lets you
control which commands run automatically, and uses rules you provide
to guide the AI as it works.

Questions & Answers

  * What is LAD?

    LAD (Language-Aided Designer) is a system that integrates
    directly into SolidWorks as an Add-in and can create sketches,
    features, macros, and other CAD objects.

  * Is LAD free to use?
  * How do you handle data collection and analytics?
  * Does LAD work with my existing SolidWorks files?
  * Where can I ask additional questions?

LAD Changelog

1.1.0

01-11-2026

Latest

  * Add planning mode
  * Add macro writing/running
  * Detect and report sketch issues
  * Improve caching efficiency
  * Various AI context improvements and bug fixes

1.0.0

01-05-2026

  * Initial release of LAD
  * AI that translates natural language queries into SolidWorks
    actions
  * Support for sketches, features, and assemblies
  * Permissioning per command
  * Checkpoint reversion system
  * Can read and search files and images
  * Natively obtains context and compresses long conversations

Try LAD now.

Download for Windows

(c) 2026 Lotas. All rights reserved.

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SolidWorks is a registered trademark of Dassault Systemes SolidWorks
Corporation. Lotas is not affiliated with, endorsed by, or sponsored
by Dassault Systemes or SolidWorks. This AI assistant add-in is not
made by, sponsored by, or endorsed by SolidWorks or Dassault
Systemes. All other trademarks are the property of their respective
owners.