Diamra vs OPJ Studio

OPJ Studio is the Shopify app side of PAJ Group, a 45-year-old jewelry manufacturer. The app launched in March 2025 under Jeanlilly, Inc., a Dallas-based developer entity, and ships as a free install with on-demand production routed to PAJ's factories. The product's own site lives at opj-studio.com, and it will be at JCK 2026 inside the Plumb Club at booth PC-130.

For a jeweler comparing OPJ Studio to Diamra, the two have surface-level overlap. Both are white-label, both eliminate inventory, both let customers customize a piece in 3D. The differences show up as soon as you ask who owns the storefront, who picks the manufacturer, and where the margin lands.

Who OPJ Studio Is

PAJ Group has been making jewelry for more than four decades, and OPJ Studio is the company's direct-to-retailer software arm. The app sits inside Shopify and turns a portion of the store's product catalog into 3D-customizable pieces that route to PAJ for production. Every order flows back to PAJ's manufacturing.

The pricing model is "free app." The subscription is zero. The cost is built into the manufacturing margin PAJ charges on every order routed through the app. The store does not see PAJ's wholesale cost, and the store does not get to shop the production. PAJ is the only supplier.

Reach is still unproven. As of May 2026 the Shopify app store shows 0 reviews 14 months after launch. The product is at JCK and on the app store, but adoption signal from independent retailers has not yet materialized.

Where OPJ Studio Is Strong

Manufacturing depth is real. PAJ has 45 years of jewelry production behind it, and on-demand fulfillment with no inventory commitment is a clean offer for a Shopify store that wants to add custom pieces without buying stock.

The Shopify integration is the right hook for the audience. If a jeweler already runs a Shopify store, the install path is short and there is no separate storefront to maintain.

The 3D customization is the core capability. Customers can rotate, swap stones and metals, and see the piece in real time before ordering. For a focused catalog of customizable styles, that is enough to drive a sale.

The trade-off is structural. The app only works inside Shopify, so a store on Magento, BigCommerce, Punchmark, or a custom site cannot use it. The production lock is the bigger constraint: every order goes to PAJ, at PAJ's margin, with no alternative. A jeweler who has spent years building a relationship with a domestic bench, a Stuller account, or an Indian partner is fighting the platform's incentives the moment a custom order comes in.

Where Diamra Is Different

Diamra is a standalone branded storefront, not a plugin. The store gets its own subdomain on storename.diamra.com. There is no Shopify dependency, no PAJ dependency, and no catalog the store has to load before customers can design. Customers describe a piece in plain language or upload inspiration, and generative AI produces a concept and an instant material estimate.

Manufacturing stays with the store. The bench, the caster, the diamond supplier the store already trusts all stay in place. Diamra handles the storefront, the AI design, the estimates, and the order tracking; the production relationship is the store's to keep. A vetted partner network is available for stores that want a referral, but it is opt-in, not the default.

Marketing infrastructure is built around the store's brand. A blog, SEO content, a newsletter, social assets, and customer reviews live in the same product. OPJ Studio is a fulfillment layer; it brings no new traffic to the site. Diamra is the channel that drives custom inquiries.

Pricing is published. Tiered SaaS, all categories included, all features included. The store knows what the subscription costs and pays its chosen manufacturer's wholesale price on the production side. There is no opaque margin folded into a "free" app.

Which Platform Fits Which Jeweler?

OPJ Studio fits a Shopify store that wants to add a small custom assortment without inventory risk and is comfortable routing 100% of production through PAJ Group. The "free" entry is appealing for a store testing the category, as long as the operator is fine with the production margin sitting inside PAJ rather than under the store's control.

Diamra fits a jeweler who wants a branded storefront on the store's own name, generative AI design rather than 3D customization of presets, and the freedom to pick the manufacturer that gives the best margin on each order. It also fits stores that do not run on Shopify, and stores that want marketing infrastructure built into the same product as the design experience.

See how Diamra approaches custom design, or check the pricing if you want to try it with your own store.