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From prototype to product, Europe to the US

Your product works. Now finish it, sell it, and fund both.

You build the product. I help structure what comes next.

The work sits between a working prototype and a product you can sell. Three jobs at once: finish or industrialize the product, open a new market, often the US, and fund both without diluting too early.

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In deeptech terms, it's the valley of death between TRL 6 and TRL 9. It's also the subject of my research: a Mines Paris–PSL thesis built on 57 interviews in France and the Bay Area. The goal stays the same: get the product in front of real buyers faster, test it against the market, and turn the first signals into traction investors can see.

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Proof of market & first customers Funding strategy & grants Financials & business plan Investor readiness US expansion Strategy & roadmap Follow-up carried for you

The method

Two windows, opened together

Founders in this position need two kinds of money. Each one pays for a different job.

Window 1 · France

Public funding to finish the product

Grants, tax credits and loans from the French system. Non-dilutive, and built for exactly this stage: the R&D that turns a prototype into something you can sell.

Window 2 · often the US

Private capital to win the market

Investors, often American, who fund go-to-market and scale. They want traction, so the first window has to buy you the time to build it.

Opened in the wrong order, you dilute early or run out of runway before the market answers.

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Opened in sequence, the public money de-risks the product and the private money arrives on better terms. This is the thread of the GO US Playbook, and of every Sprint.

Is this you?

  • Your prototype works. Turning it into something you can sell is another eighteen months and money you don't have yet.
  • Your buyers are in the US. Your product, your team and your funding are still in France.
  • You likely qualify for French grants and tax credits. Nobody has mapped them, and the applications keep slipping.
  • Investors like the technology. They ask for traction you can't show yet.

This is not for you if

  • You have an idea, but no working product yet.
  • You don't need to raise money or apply for funding.
  • You're looking for someone to execute tasks, not to work on the strategy with you.

Not sure? The Decision tools help you check, and "not yet" is a valid answer.

Where do you want to go?

Work with me

You're building a company and the financing side is eating your time.

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The offer →

Going to the US

You're wondering whether, when or how to approach the American market.

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Not sure? Test your situation →

My journey

You want to know who is behind this before anything else.

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Follow the journey →

The engagement

One Sprint. Then momentum, if you want it.

1 · Sprint & Build

€400 / day · 3 to 5 days

The intensive phase. We structure the financing strategy and actually build what needs to exist: business plan, financials, applications, investor materials. Available on its own.

2 · Momentum

From €500 / month · usually 3 months first

Optional follow-up, after the Sprint only. Applications advance, deadlines get tracked, meetings get prepared, while you stay focused on the company.

Flat fees. No percentage of funds raised, no commission on grants or subsidies. Final scope and price are set together after a first conversation.

The full offer, deliverables and pricing →

Free simulator

What public funding could you claim?

Five questions, about a minute. A first map of the French grants, tax credits and loans that could fit your company, with an order of magnitude.

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Galien Del Vecchio

I work between France and the Bay Area. I was trained on both sides: finance at EDHEC, deeptech at Mines Paris–PSL, and fintech at Menlo College in Silicon Valley. My research on the two ecosystems left me with one conviction: European deeptech founders should engage with the US much earlier than they do.

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I've seen financing from the institutional side: reviewing deeptech funding applications at Bpifrance, and working in M&A around BNP Paribas. And from the founder side: co-founding King Tut and Projet R, and advising clients like Targumi. That's why the work is founder-side but speaks the funder's language.

20+ companies supported
4 research papers
2 startups co-founded
7 years in the startup ecosystem
8,500+ people & organizations mapped
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The 8,500+ is a working map of investors, funders, founders, corporates and institutions, built to know who is relevant, for what, and when. The number is the map, not an address book.

See what I've done →

Galien Del Vecchio on stage at a Menlo College event

The flagship resource

The GO US Playbook

Playbook, 2026
GO US
Raising and selling in the US as a French deeptech
English edition
90 pagesPDF

The full method for approaching the US as a European deeptech founder. Built from two years of research, 57 interviews on both shores, and direct advisory work with startups making the crossing.

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Inside: whether the US makes sense for you at all · sequencing non-dilutive and dilutive funding · when a US entity actually makes sense · building a US go-to-market from France · the mistakes first-time founders make.

It's built on the research. Want to test your own situation first? Start with the Decision tools.

Request the full playbook Read the excerpts first

Talk it through first

Thirty minutes, free. You tell me where the company is, I tell you honestly whether and how I can help, and what I'd start with. If a Sprint isn't the right answer, I'll say so.

Book a meeting See the offer first

Prefer to explore on your own? The Playbook · Decision tools · Research · Failures