Kerf vs Ruby Kinglet
Kerf
vulos.orgRuby Kinglet
rubykinglet.aiSide by side
| Figure | Kerf | Ruby Kinglet |
|---|---|---|
| Price from | Free | $7/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 2 | 5 |
| Spec score · Jewelry Design Software | 8.6 (#3) | 8.1 (#12) |
| Data ownership | Project revisions and local Git history are stored on the operator's node, and an unconfigured installation does not open network sockets. | The company states that supplied images and trained models remain exclusively the user’s unless voluntarily shared with the community. |
| Maker | Kerf is part of the Vulos open-source software organization. | The maker describes its founders as a jeweler, fabricator, and designer, and a GIA Graduate Gemologist with AI and jewelry-software experience. |
| What it does | Kerf is a locally run CAD system combining parametric modeling, drawings, simulation, CAM, electronics, BIM and manufacturing workflows. | Ruby Kinglet is an AI workbench combining jewelry design, photoshoots, CAD workflows and storefront customizers. |
Plans
Ruby Kinglet
- Personal$7 a month
- Professional$35 a month
- Studio$179 a month
- Studio$179 a month
- Studio annual$1,500 a year
In their own words
Kerf
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.
Ruby Kinglet
Ruby Kinglet is a browser-based AI workbench for jewelry design, product imagery, CAD workflows and storefront customizers. Design tools provide component builders for settings, stones, metals and findings, plus an AI Studio with more than 20 editing tasks. Users can access more than 6,000 community templates, create personal templates and train models on their own jewelry portfolios for use across the platform. Photoshoot tools create product images and video with controls for lighting, angles, scenes and skin tone. STL or 3DM files can be render inputs, with geometry stated to remain exact in resulting imagery. CAD workflows generate and edit STL and 3DM files; supported formats include STL, 3DM, OBJ and GLB. Storefront customizers import from Shopify and are described as compatible with Webflow, Wix and Woo. Plans have monthly usage limits except Studio. Personal costs $7 a month, Professional 35.00 USD and Studio 179.00 USD, with a 14-day trial.