Skip to content

The company

Built like jewelry.

Jewelers deserve a partner as good as their craft. That’s the whole company.

Behind the counter of every independent store: world-class craft on a duct-taped stack — a POS from one decade, a website from another, memo stones in a spreadsheet. The software industry decided jewelers were too small to build for properly, sold them fragments, and called the gaps “integrations.” Every gap leaks money.

Gemercel is the disagreement. One system, built only for this trade, engineered like it’s holding your life savings — because it is. And not just software: a partner that stocks the diamonds, cuts the shapes, runs the melee, and manufactures the jewelry — whitelabeled, so the store’s name is the only name a customer ever sees.

We build engine-first — every dollar computed by one audited money engine, landing in real double-entry books. We build open — the network protocol is published and conformance-tested in public. And we onboard by hand, because the first cohort of stores isn’t a growth metric. It’s the foundation.

How we build

Non-negotiable.

Four principles that don't move, whatever the roadmap says.

Craft-grade engineering

A jeweler measures in tenths of a millimeter and won't accept a visible seam. Neither do we: one money engine, double-entry books, append-only audit — the invisible work done right.

Your data is yours

Full export any time, open formats, self-hosting as a first-class option. Software you can leave is software you can trust staying with.

Open beats walled

We published GDJ — the Global Diamond Jewelry Protocol — under Apache-2.0 and run its conformance suite in public. An industry's rails shouldn't have a landlord — even us.

White-glove or nothing

Migration done for you, training by role, founders on the support line. The industry's software problem was never features — it was abandonment after the invoice.

We’re a small team of builders — engineers who’ve shipped trading systems, ledgers, and geometry kernels — working directly with the first stores. No sales floor, no ticket tiers. If you write to us, a founder answers.

Help us build it around your store.