An expert note for every model
Claude writes a short note for each club model — what it is known for and who it suits. It is written once per model and reused by every listing of that model.
Company
diivot is a marketplace for pre-owned golf equipment, with a fitting engine that tells each golfer whether a club suits their game. We are launching in Italy first.
The problem
Golf equipment is expensive and golfers change it often, so a lot of it is sold second-hand. Today that happens in social-media groups, classifieds and generalist marketplaces.
There, specs are missing or wrong, buyers can't tell whether a club fits their swing, and paying a stranger is a leap of faith. A driver that is perfect for one golfer is the wrong club for the next — and nothing in a generic listing tells them apart.
What we built
The full buy-and-sell loop runs in our iOS app, designed around the questions a golfer actually asks before buying a club.
How we use Claude
We use Claude to build and check golf knowledge — and to build the product itself. Whether a club fits you is never left to a language model.
Claude writes a short note for each club model — what it is known for and who it suits. It is written once per model and reused by every listing of that model.
Every note must pass a rule-based validator and a panel of three Claude reviewers voting on it. A text that fails is not shown.
When a listing is published, Claude Haiku completes the catalog data of its club and shaft model, so the fitting engine works with real specs instead of a title.
diivot is built by one founder working with Claude Code: 1,908 of the 2,020 commits since January 2026 are co-authored with Claude — the app, the backend, 77 serverless functions and about 7,350 automated tests.
The fit verdict is computed on the phone by our own deterministic engine and never calls a model. On the AI side, spend is metered every day, prompts are cached, and the costliest jobs — web research and nightly reconciliation — stay switched off until they are needed.
The market
Sources: National Golf Foundation, Graffis Report (2025 data, February 2026); The R&A, Global Participation Report (2025 data, June 2026) and 2023 figures (September 2024). Each source counts golfers its own way; the definition sits next to each number.
Together, close to 70 million people play golf on a course in these five markets — the largest in the world, and the ones diivot is built for. We start in Italy, where the product, the carriers and the legal framework are ready today, and grow market by market. The catalog, the fitting engine and the app are language-independent: Italian and English are live, five more languages — Japanese included — are translated and waiting for native review.
Sources: IMARC Group, Golf Equipment Market (2025 data, August 2026); Credence Research, Pre-Owned Golf Equipment Market (2024 data). Market-research estimates vary between firms; these are the ones we cite.
Golf clubs are expensive and golfers change them often, so good gear changes hands all the time — yet the second-hand trade is still split between retailer trade-in programmes, classifieds and generalist marketplaces that don't know a flex from a bounce. Vinted showed what one trusted, person-to-person marketplace does to a category. diivot is that marketplace for golf, built around the one question a generalist can't answer: does this club fit you?
Where we are
Team
diivot is founded and built by a single founder in Italy, a golfer. Product, design and engineering are done in-house, with Claude Code as the engineering team, every day.
The way we build is part of the product: every architectural decision is written down — 191 decision records so far — and whether a club fits a golfer is never left to a black box.
Investors, partners, press — or golfers who want early access to the beta.