These three come up together constantly, and they are not really competing for the same job. Tashvi is the cheapest and fastest way to get a jewelry design image. BLNG is the polished option for brands with a budget and a procurement process. Ruby Kinglet is for jewelers who need the design to become something they can make and sell. 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 concept images cheaply, Tashvi, and its free tier is genuinely free. If you are a brand or design house wanting polished renders with support behind them, BLNG. If you want deep control over the design and a path from it into CAD, product photos, and a storefront, Ruby Kinglet. The single fact that separates them: Tashvi and BLNG end at an image, and Ruby Kinglet ends at a file, imagery, and a store.
Side by side
| Feature | Tashvi | BLNG | Ruby Kinglet |
|---|---|---|---|
| Starting price | Free, then $10/month | Free, then $49/user/month | $7/month |
| Free tier | Yes, 20 designs/month, no card | Yes, capped and non-commercial | No |
| Aimed at | Anyone wanting fast designs | Brands and design houses | Independent and bespoke jewelers |
| Access | Self-serve | Self-serve to Professional; best modules demo-gated | Self-serve on every plan |
| Design input | Prompts, sketches, guided mode | Prompts, references | Component builders: 700+ jewelry components, 300+ gemstone species and varieties |
| Usage limits | Credit-metered, 20 to 3,000/month by tier | Feature-gated tiers | No credit balance; soft cap on Professional that one user has ever reached, none on Studio |
| Your own AI model | Not offered | Not offered | Train on your portfolio, reuse across the platform |
| Manufacturable file | STL export | No, renders only | STL on $35, editable 3DM on $179 |
| Product photos | No | Renders, plus enterprise Studio module | Yes, photo studio on $35 |
| Storefront customizer | No | Enterprise Retail module | Yes, on Studio, any site that takes HTML |
| Best for | Fast, cheap concept images | Polished brand renders | Design work that becomes a product |
Tashvi: cheapest and fastest
Twenty designs a month free with no card, then $10, $30, and $50 a month for 200, 1,500, and 3,000. A prompt or a sketch becomes a concept image in about a minute, on a phone if you want. It has a guided mode for setting type, stone shape, and metal, and an agent mode that refines over several turns, so it is more structured than a plain prompt box. If the job is showing a client three directions this afternoon, nothing here beats it on speed or price. Its ceiling is that everything is metered by credit and the output is a picture plus an STL export you should test before trusting.
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.
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 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.
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 newly released, so it does its best work on common styles like engagement rings and is still experimental across the broader range. 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.
Choose by fit
Choose Tashvi if you want fast, low-cost images and nothing downstream. Choose BLNG if you are a brand or design house that wants polished renders and enterprise modules with support behind them. Choose Ruby Kinglet if you want deeper design control and the design to reach a real file, real photos, and your store. Running a cheap image tool alongside a deeper one is a common and sensible setup, not a contradiction.
Common questions
Tashvi vs BLNG, which is better for jewelry?
Tashvi is cheaper, faster, and has a real 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.
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 offers an STL export, which you should test against your own manufacturing. BLNG outputs images only.
Which one is cheapest?
Tashvi, and by a distance 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?
It depends on the work. For concept images only, Tashvi. For design work that has to become a piece you make, photograph, and sell, Ruby Kinglet, which is priced and built self-serve for independents rather than for enterprise procurement.