These three come up together constantly, and they do different jobs. Ruby Kinglet is for jewelers who need the design to become something they can make and sell. BLNG is the polished option for brands with a budget and a procurement process. Tashvi is a budget way to get a concept image.
Ruby Kinglet is ours, and it is the only one of the three that ends in a file, photos, and a store. Updated September 2026. Pricing is from each tool's own pricing page as of that date.
The short version
Ruby Kinglet gives you deep control over the design and a path from it into CAD, product photos, and a storefront, and it is the only one of the three where the design ends as a file, imagery, and a store. BLNG suits a brand or design house that wants polished renders with support behind them. Tashvi covers cheap concept images. Tashvi and BLNG end at an image; Ruby Kinglet ends at a product.
Side by side
| Feature | Ruby Kinglet | BLNG | Tashvi |
|---|---|---|---|
| Starting price | $7/month | Free, then $49/user/month | Free, then $20/month |
| Free tier | No | Yes, capped and non-commercial | Yes, limited generations, no card |
| Aimed at | Independent and bespoke jewelers | Brands and design houses | Anyone wanting fast designs |
| Access | Self-serve on every plan | Self-serve to Professional; best modules demo-gated | Self-serve |
| Design input | Component builders: 700+ jewelry components, 300+ gemstone species and varieties | Prompts, references | Prompts, sketches, guided mode |
| Usage limits | No credit balance; monthly cap on Personal and Professional, none on Studio | Feature-gated tiers | Credit-metered by plan |
| Your own AI model | Train on your portfolio, reuse across the platform | Not offered | Not offered |
| Community library | 6,000+ community templates and shared jeweler-trained models | Not offered | Not offered |
| Manufacturable file | STL on $35, editable 3DM on $179 | No, renders only | Marketed STL export |
| Product photos | Yes, photo studio on $35 | Renders, plus enterprise Studio module | No |
| Storefront customizer | Yes, on Studio, any site that takes HTML | Enterprise Retail module | No |
| Best for | Design work that becomes a product | Polished brand renders | Budget concept images |
Ruby Kinglet: depth, then a product
The difference on the design side is how far down the controls go. Ruby Kinglet ships more than 700 built-in jewelry components, including over 300 gemstone species and varieties catalogued by a GIA Graduate Gemologist. Metals run from bases through satin, brushed, engraved, and anodized finishes. Settings come from an illustrated library of prong styles, head styles, shank profiles, galleries, and halos. On top sits an AI Studio with more than 20 jewelry-specific editing tasks, each its own tool. Add mood boards where each reference carries a directive, your own uploaded component libraries, more than 6,000 community templates, and models you train on your own portfolio. This is jewelry software built on AI, and it shows on complex work: prompt-driven tools handle symmetrical, conventional pieces and go vague on an asymmetric setting or a mixed-cut cluster. Jewelers also share trained models and templates with each other, so the starting point grows as the community adds to it. Neither of the other two has an equivalent. It is also the oldest of the three, in development since 2022 by a founding team of a bench jeweler, a GIA gemologist, and machine learning specialists.
Ruby Kinglet meters nothing on screen. Tashvi counts credits and BLNG gates features by tier, while Ruby Kinglet shows no balance and, on Professional and above, no ceiling you have to work around. That matters more than it sounds: when a variation costs a credit you decide whether it is worth trying before you try it, and you stop at good enough.
The design then carries forward: STL and mesh on the $35 Professional plan, editable 3DM on the $179 Studio plan or $125 billed annually, a photo studio for product shots, and a storefront customizer a customer can order from, all in one workspace. 3DM editing covers engagement rings and the common styles today. Ruby Kinglet has no free tier, and that follows from the shape of the product: twenty free generations tell you most of what a prompt box does and very little about a component builder, a 20-task AI Studio, a CAD pipeline, and a storefront engine, which is why the entry point is $7.
BLNG: polished, and priced for brands
The Professional plan is $49 per user a month for unlimited files, 4K upscaling, and full commercial rights. Above it sit two enterprise modules behind a demo: Studio, which turns your existing 3D assets into marketing imagery, and Retail, for in-store real-time customization. Two things narrow the fit. Everything it makes is a render, with no STL and no CAD, and its Studio module takes a 3D file as an input without handing one back. And the strongest parts are enterprise, so reaching them means a sales cycle.
Tashvi: budget concept images
A free plan with limited generations and no card, then $20, $60, and $200 a month ($16, $48, and $160 billed annually). It has a guided mode for setting type, stone shape, and metal, and an agent mode that refines over several turns. Every generation draws down a credit, and the output is a picture plus an STL export Tashvi still describes as in development for advanced CAD.
The pick
Choose Ruby Kinglet if you want deeper design control and the design to reach a real file, real photos, and your store. Choose BLNG if you are a brand or design house that wants polished renders and enterprise modules with support behind them. Choose Tashvi if you want low-cost images and nothing downstream. Many jewelers run a cheap image tool alongside Ruby Kinglet, and that pairing works well.
Common questions
Tashvi vs BLNG, which is better for jewelry?
Tashvi is cheaper and has a free tier, so it wins for quick concept images. BLNG is more polished and aimed at brands, with commercial rights and enterprise modules at $49 per user a month. Neither outputs a manufacturable CAD file; Ruby Kinglet (ours) does, for designs you will manufacture.
Which of the three gives a file I can manufacture from?
Ruby Kinglet: STL and mesh on the $35 plan, editable 3DM on the $179 plan. Tashvi lists STL export on paid plans and still describes advanced CAD export as in development. BLNG outputs images only.
Which one is cheapest?
Tashvi, if the free plan covers you. Ruby Kinglet starts at $7 a month with no free tier. BLNG's Professional plan is $49 per user a month.
Which is best for an independent jeweler?
Ruby Kinglet, if the design work has to become a piece you make, photograph, and sell; it is priced and built self-serve for independents. For concept images only, Tashvi covers that job cheaply.