The team's media appearances, followed by our insights and portfolio news. Each item carries its original date; content predating Swann refers to One Green.
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Interviews, programmes and op-eds in external media. One card per appearance: audio, video and written versions are grouped on the same card.
Vanessa Proust ·
Financial analysis, valuation and getting a company ready for its fundraising.
Vanessa Proust ·
Professional background and how the investment activity was built.
Vanessa Proust ·
Relations between investors and founders, diversity and exits.
Jérôme Proust ·
Negotiation, the pace of a sale and the reverse merger with Sodexo. Episode 27, 1 h 20.
Jérôme Proust ·
Entrepreneurship, management and lessons from the combination with Sodexo.
Vanessa Proust ·
Article by Florence Hubin on business angels and impact investing, featuring Vanessa Proust and One Green.
Full text for Le Parisien subscribers.
Vanessa Proust ·
Career at EY, investing and working with entrepreneurs.
Vanessa Proust ·
Discussion with Hayat Outahar on artificial intelligence and company financing (20 minutes).
Vanessa Proust ·
From audit to investing, and how club deals are structured.
Vanessa Proust ·
Experience of early-stage investing and follow-on investments.
The 300 business angels in the title refer to the community at the time.
Jérôme Proust ·
Three questions on gift vouchers, as CEO of Glady (RTL Petit Matin, filmed interview).
Vanessa Proust ·
The investor community as a resource for portfolio companies.
Video published by Roundtable, a club deal platform and a Swann portfolio company (club deal 2023).
Jérôme Proust ·
Growing Wedoogift, the acquisition and keeping an entrepreneurial culture.
Jérôme Proust ·
Q&A on the creation of Glady and its offer (Alain Gabriel).
Jérôme Proust ·
Op-ed by Jérôme Proust on profitability and corporate responsibility.
Vanessa Proust ·
Selection criteria, the startup ecosystem and supporting founders.
Jérôme Proust ·
Jérôme Proust explains the combination of Wedoogift and Sodexo and the creation of Glady.
Jérôme Proust ·
Programme with Oualid Hathroubi and Arnaud Rayrole; BFM's replay is titled after the annual review topic.
Jérôme Proust ·
Building the company, commercial innovation and management.
Jérôme Proust ·
Interview by Alexandre Lichan in a programme produced with Media RH.
Jérôme Proust ·
The combination of Wedoogift and Sodexo, with François Gaffinel.
Jérôme Proust ·
Wedoogift and the TF1 Publicité works council, with Sylvie Chaigne Bizot.
Jérôme Proust ·
Interview by Raphaëlle Duchemin on the solution developed by Wedoogift.
Jérôme Proust ·
Archive from Wedoogift's early days (5 min 12).
LinkedIn posts by the team and portfolio companies, adapted into articles. Each article links to the original post.
MarketBy Vanessa Proust
Excluding one giant deal, the underlying summer market is about €326M. A reading of the July and August figures.
French Tech announced €1.14bn raised in July. But €872M, or 76% of the total, came from a single transaction: Ardian's buyout of HR Path. Excluding it, July falls to €267M, and August reached only €59M: over the summer, the underlying market is about €326M.
Deeptech keeps attracting capital (Elixir Aircraft, Cyllene Therapeutics, Gradium, Syntetica). The market remains very domestic: nearly 80% of the investors identified in July were French, and Bpifrance took part in eight deals in that month alone.
Only five of July's thirty deals involved a startup founded or co-founded by at least one woman: 16.7% of deals, 2% of the capital raised.
September changed scale with Mistral AI's round. It illustrates increasingly polarised funding: a few champions raise hundreds of millions while most startups face a tougher market. The real question becomes: how many companies are actually funded, and by whom?
Market figures quoted from the public sources indicated; they do not describe the performance of Swann or its portfolio companies.
ExitBy Vanessa Proust
Exit from a company supported at board level for three years, from investment to sale.
INGA, a brand launched in 2021 to replace disposable household products with durable alternatives (washable sponges and paper towels…), joins the Altaïr group, a European household-care player.
From the outset, the analysis focused on the execution capacity of a committed and demanding team, in a market many considered mature. Support then took place at board level: backing, challenging and preparing each major decision, in a relationship of trust built over several years.
SideAngels, a co-investor in the deal, states publicly that One Green supported the management at board level for three years and played a key role in structuring the exit.
Swann does not publish the financial terms of the sale. Results announced by a co-investor relate to its own vehicle.
MarketBy Vanessa Proust
€1.5bn announced, including €890M for a single seed round. What the other 37 deals say.
French Tech announced €1.5bn raised in March 2026. Excluding AMI Labs (€890M at seed, the largest seed round in European history), €622M remains across 37 deals, up 342% on March 2025: the best month outside mega-rounds in a long time.
AI captured 74% of the capital. Three late-stage rounds (none in March 2025) show a market funding scale-ups. Insurtech raised €126M in the month, against an average of €7M a month in 2025.
Pasqal (€170M) and Alan (€100M) were among the notable deals; signals are also emerging in cybersecurity and infrastructure.
Market figures quoted from the public sources indicated; they do not describe the performance of Swann or its portfolio companies.
MarketBy Vanessa Proust
€421M raised in November, down year on year, but 55 deals and steady dealflow.
French startups raised €421M in November 2025, against €749M a year earlier (–44%), across 55 deals (74 in November 2024).
After a September driven by large AI rounds, November returned to smaller tickets, stricter selection and a focus on capital efficiency. Upway (€52M), Zadient Technologies (€35M) and Deblock (€30M) were the month's largest rounds.
Dealflow remains deep; climate and energy, applied AI, fintech and health lead the market. At seed, more reasonable valuations open a favourable window for patient investors.
Market figures quoted from the public sources indicated; they do not describe the performance of Swann or its portfolio companies.
PortfolioBy Nicolas Lespinasse (Abby)
Public announcement by Abby's co-founder: a round led by TOMCAT and One Green, with Kima Ventures.
On 22 September 2025, Nicolas Lespinasse, co-founder of Abby, announced a €3M round led by TOMCAT and One Green, with Kima Ventures taking part.
Abby, a management tool for freelancers (invoicing, payments, tax filings, simple accounting), aims in particular to make e-invoicing accessible to every entrepreneur.
The date shown is that of the public announcement. One Green has supported Abby since 2023; the Abby club deal dates from 2025.
MethodBy Vanessa Proust
Valuation, type of financing, timing: three reasons not to stop at the amount.
Valuation first: it is rarely disclosed, yet it tells the story of the round. A round at a lower valuation than the previous one (a down round) often signals a recapitalisation or revised targets.
Instruments next. A fundraising in the strict sense is a capital increase: equity investors bet on the company. Headline amounts sometimes include debt (bonds, bank or Bpifrance loans), which usually comes with guarantees, credit lines intended for customers, or even grants and tax credits.
Timing, finally: the announcement often comes months after the negotiations and may bundle several transactions, such as an earlier bridge.
What matters is not the amount raised but the value created with it. The company examples are in the original post.
MethodBy Vanessa Proust
An exit negotiated with an unfavourable earn-out: the experience behind One Green's club deals.
Vanessa Proust looks back on a 2021 investment in a B2B software company. Three years later, an acquisition offer arrives; but more than half of the price is an earn-out, a deferred payment reserved for the founders and tied to future targets, which sharply reduces what investors receive.
Several investors oppose the offer. A poorly drafted drag-along clause nonetheless leaves the founders in control. After long negotiations, the terms improve, with the earn-out still a third of the price.
The lesson: in a fragmented cap table, isolated business angels carry little weight at exit, even when they took the most risk. A club deal pools access to deals, but also aligns interests to weigh in negotiations.
This experience led to the creation of One Green's club deals.