These three come up together constantly, and they are not really competing for the same job. 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. Pick by which of those sentences describes your week.
Ruby Kinglet is our product, and this page says plainly where each of the other two wins. Updated July 2026. Pricing is from each tool's own pricing page as of that date.
The short version
If you want deep control over the design and a path from it into CAD, product photos, and a storefront, Ruby Kinglet; it is the only one of the three where the design ends as a file, imagery, and a store. If you are a brand or design house wanting polished renders with support behind them, BLNG. If you only want cheap concept images, Tashvi. The single fact that separates them: Tashvi and BLNG end at an image, and 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 $10/month |
| Free tier | No | Yes, capped and non-commercial | Yes, 20 designs/month, 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, 20 to 3,000/month by tier |
| 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. There are more than 700 built-in jewelry components, including over 300 gemstone species and varieties, with the gemstone libraries built by a GIA Graduate Gemologist. Metals run from bases through satin, brushed, engraved, and anodized finishes, and 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, plus 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. That is jewelry software using AI underneath rather than a general AI tool with jewelry prompts, and it shows up on complex work: prompt-driven tools are reliable on symmetrical, conventional pieces and go vague on an asymmetric setting or a mixed-cut cluster. Part of the library is also contributed rather than shipped: trained models and templates can be shared between users, so the starting point grows as other jewelers add to it. Neither of the other two has an equivalent. And it is the oldest of the three: in development since 2022, from a founding team that includes a bench jeweler, a GIA gemologist, and machine learning specialists.
There is also nothing metered on screen. Tashvi counts credits and BLNG gates features by tier; Ruby Kinglet has no balance to watch, and on Professional and above the ceiling is not something you work around. That sounds like a small thing and is not. When a variation costs a credit you decide whether it is worth trying before you try it, and you stop at good enough rather than right.
Then it carries: 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 sharing one workspace. The honest limits: there is no free tier, and the parametric 3DM engine is the newest part of the platform, so it does its best work on common styles like engagement rings, with the broader range still maturing. The first of those follows from the shape of the product. Twenty free generations tell you most of what a prompt box does. They tell you very little about a component builder, a 20-task AI Studio, a CAD pipeline, and a storefront engine, which is why the entry point here is $7 rather than free.
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. It is well built and well supported. 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 ever handing one back. And the strongest parts are enterprise, so reaching them means a sales cycle.
Tashvi: budget concept images
Twenty designs a month free with no card, then $10, $30, and $50 a month for 200, 1,500, and 3,000. It has a guided mode for setting type, stone shape, and metal, and an agent mode that refines over several turns. The ceiling: everything is metered by credit, and the output is a picture plus a marketed STL export you should test against your own manufacturing before trusting.
Choose by fit
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. Running a cheap image tool alongside Ruby Kinglet is a common and sensible setup, not a contradiction.
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; that is the gap Ruby Kinglet (ours) fills if the design has to be made.
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 markets an STL export, which you should test against your own manufacturing. BLNG outputs images only.
Which one is cheapest?
Tashvi, if the free tier covers you: 20 designs a month with no card. 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 rather than for enterprise procurement. For concept images only, Tashvi covers that job cheaply.