CAD Skills vs Janitor AI: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of CAD Skills and Janitor AI — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
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CAD Skills
earthtojake
Open-source library of agent skills for CAD, robotics, fabrication, and simulation — generate STEP/STL, URDF/SRDF/SDF, DXF, and slicer G-code from prompts.
Key features
- Prompt-to-CAD Generation: The CAD skill creates and edits parametric CAD models from natural language or image requests, exporting to STEP, STL, 3MF, and GLB.
- URDF Robot Description: Writes robot structure files with links, joints, limits, inertials, and meshes ready for ROS-based stacks.
- SRDF for MoveIt2: Adds planning groups, end effectors, named poses, and collision rules on top of a URDF for MoveIt2 planning.
- SDF Simulation Worlds: Creates simulator models and worlds with frames, physics, sensors, and lights.
- 2D DXF Drawings: Produces cut-ready DXF profiles, templates, gaskets, and layouts from Python or CAD geometry.
- G-code Slicing: Slices supported mesh files into validated, printer-profiled FDM G-code using real slicer CLIs.
- Bambu Lab Print Jobs: Dry runs, uploads, and cautiously starts local Bambu Lab prints from validated G-code.
- CAD Viewer Previews: Local browser previews for CAD, G-code, URDF, and other robot files for fast agent iteration.
Best for
- Agentic Mechanical Design: Let a coding agent iterate on brackets, flanges, and enclosures directly from natural-language specs.
- Robot Description Authoring: Generate URDF/SRDF/SDF files for new robot arms or mobile bases without hand-writing XML.
- Rapid Prototyping: Take a CAD model to sliced, printer-ready G-code and kick off a Bambu Lab print from within an agent workflow.
- Custom Part Fabrication: Produce DXF/STEP files pre-checked for SendCutSend, then order laser-cut or CNC parts.
- Simulation Setup: Author SDF worlds for physics simulators with the right frames, sensors, and lighting for robotics research.
- Off-the-Shelf Sourcing: Use step.parts to pull ready-made STEP models for common hardware like screws, bearings, and connectors.
Janitor AI
Janitor AI / JanitorAI.com
Web-based platform for scripted, character-driven roleplay chats powered by large language model backends.
Key features
- Script-Based Roleplay: Enables creation and execution of scripted character roleplays with custom prompts, behaviors, and branching conversation logic to shape character responses.
- Character Hosting and Sharing: Hosts user-created character pages and dialogues so other users can discover, load, and interact with predefined characters.
- OpenAI/API Backend Integration: Uses external LLM backends (e.g., ChatGPT/OpenAI API) for generation, requiring API connectivity and subject to provider rate limits and account restrictions.
- Low-Moderation Environment: Operates with minimal content moderation, allowing broad creative expression and experimental content but increasing content-safety risks.
- Web Chat Interface: Provides a browser-based chat UI optimized for interactive roleplay with characters and scripted scenarios.
- Third-Party Extensibility: Strong community ecosystem including scrapers, proxies, and integrations to export characters, automate interactions, or route traffic around regional or rate limits.
- Web-hosted conversational character pages with chat UI
- Script-based roleplaying support for defining character behavior and responses
- Minimal built-in moderation (user-generated content may be unrestricted)
- Commonly accessed via HTTP scraping or reverse-engineered endpoints
- Works with proxy layers to mitigate region locks, bans, or rate limits
- Often integrated into developer workflows using Dockerized scrapers and npm frontends
- Can be combined with external LLMs/APIs (e.g., OpenAI) via intermediary tooling, though no official public API is documented
Best for
- Interactive Storytelling: Run multi-turn, character-driven narratives where authors script personalities and responses to create immersive roleplay sessions.
- Character Prompt Development: Design and iterate on character prompts and behaviors to tune personality, tone, and response patterns for entertainment or testing.
- Content Extraction and Backup: Use community scrapers to export character definitions and conversation scripts for local analysis or preservation.
- Bypassing Regional/Rate Limits: Employ third-party proxies or IP-rotation tools to maintain access and performance when facing regional blocks or API rate limits.
- Rapid Prototyping of Conversational Agents: Prototype persona-driven chatbots by composing scripted characters and testing interactions in a live web interface.
- Community Sharing and Discovery: Share notable characters publicly so others can load, rate, and continue conversations for collaborative roleplay.
- Interactive roleplay and character chat for end users
- Extraction/scraping of character scripts for use with local or hosted LLMs
- Testing and evaluation of conversational agents and personas
- Feeding character personas into LLM pipelines or fine-tuning datasets
- Developer automation where proxies and IP rotation are used to scale interactions