Drakon vs Kerf

Drakon is jewelry design CAD software that works as a plug-in for Rhino and Grasshopper. Its Jewelry Builders and Interactive Gallery include components such as rings, gems, bands, bezels, prongs, patterns, ornaments, and gem settings. Designers can change settings while working and have the model readjust; logic-based tools record modeling history. Controls cover weight, measurements, gem placement, and sizes. Production tools can generate technical reports and STL meshes for 3D printing, and the product lists photorealistic rendering and manufacturing export. A web viewer lets users open and share 3D models from any device, with cloud and e-commerce integration. Drakon Copilot accepts natural-language instructions to automate Drakon and Rhino tasks, but requires internet access. The software requires Rhino 7 or 8 and supports Windows 10 and 11; Linux is unsupported. Its fully functional 30-day trial leaves only a few tools available afterward. A Drakon license costs 1,995.00 EUR once, with Rhino required separately unless purchased in a bundle. Copilot credits are sold separately.

Kerf is a free, open-source CAD workspace that runs on the user's own machine and supports work across 37 engineering domains. Users can describe design changes in plain language or use the Python kerf-sdk and JSON-RPC API. Mechanical design tools include constraint-based sketching, parametric feature history, validated B-rep geometry, drawings, and persistent face references. The workspace also includes FEM analysis, topology optimization, SPICE and RF analysis, CAM toolpaths, and G-code output. Listed outputs include STEP, STL, 3MF, IFC4, Gerber, PDF, DXF, BOM CSV, Touchstone, GDS-II, and firmware binaries. The site describes workflows for mechanical and electronics engineers, BIM architects, jewelry designers, and other engineering users. Kerf runs locally without accounts and keeps Git history for file revisions. Workshop content can be used offline once pinned. Installation options include source or Docker, with release archives listed for macOS arm64, macOS x64, and Linux x64; source installation requires Python 3.11 or later. The chat workflow can use a bring-your-own LLM; no bundled model or paid hosted plan is listed.