Regulated
- Risk level
- High
- Risk-return
- Medium
- Start from
- €1,000
Wind Fisher
France
Wind Fisher develops airborne wind generators — helium-filled rotating wings tethered to a ground station — that use the Magnus effect to produce electricity from strong, steady winds at 300–500 metres, targeting off-grid sites, businesses and, later, utilities and data centers.
Key figures
- Estimated return
- up to 10×
- platform's estimate
- Valuation
- €9,961,800
- Start from
- €1,000
- Target
- €600,000
What you own, how it can pay off, and when
How can it pay off?
The platform estimates up to 10×
Usually only if the company is sold or listed. Estimates are the platform's own claims.
Capital at risk. Most startups fail; estimates are the platform's own claims. Shares are hard to sell before an exit.
Would AI invest?
AI 63 MediumOur AI gives this project 63 out of 100: Medium. How the AI score works
Information, not personal investment advice. The AI score rates the documents the platform publishes, can be wrong, and does not predict returns.
AI review
AIProject memo · Crowdinform
Wind Fisher: flying wind generators, helium-filled rotating wings tethered to a ground station, that make electricity from strong, steady winds at 300–500 metres for off-grid sites, businesses and, later, utilities and data centers
THIS IS NOT INVESTMENT ADVICE. ℹ️ Information, not investment advice. Capital at risk — you could lose the full amount invested. Full notes are at the end of this memo.
AI score
63/ 100
●Average
1–2930–4950–6970–8485–100
Strongest evidenced precondition: a proven, publicly confirmed world-first autonomous flight and a founding team whose track records check out. Biggest gap: the company is pre-revenue, the first sellable product is 12–18 months away, and several of its own key numbers conflict with each other.
💶 1 · Is the price fair?
Not scoredInsufficient comparables to assess — the listing values the company at €9,961,800, but we found no comparable airborne-wind funding rounds or sale prices with published valuations to compare it against. See the valuation detail and the questions section.
⭐ 2 · Can they reach an exit stage?
63 / 100Average: meaningful preconditions missing or weakly evidenced.
🎯 3 · If they do, what could it pay?
Target 10x over 7–10 yrsThe standard aim for seed-stage investing, with the horizon extended because the product still needs aviation certification and industrial scale-up. On the listed price, a 10x payout requires the company to be worth roughly €107M when sold; at typical deeptech sale pricing (2–4x revenue), that means roughly €27–53M of annual revenue. We found no recorded sales of comparable companies with published values to compare against. These figures do not include dilution from future fundraising rounds, which would reduce actual returns — see the dilution section. Most early-stage investments return little or nothing.
Missing dataInconsistencies foundOutside discrepancies found
No negative newsPrior round confirmedValuation: no comparables
The six integrity checks in one line; each is explained in the red-flags section.
What we could check. We verified the company’s registration, the founders’ backgrounds (including the CEO’s prior company sale), the Techstars investment, the €2M 2024 fundraise, the autonomous test flight, and the TV coverage against public sources. The letters of intent, the EDF and Michelin partnerships, all performance and cost figures, and every detail of what a shareholder would actually own rest solely on the company’s own materials — see the questions section. Your money is locked in. Crowdfunding shares normally cannot be sold early — expect your money to be tied up for several years, until the company is sold or a similar event happens.
Three answers, one honest note. The price-fairness line says whether the entry price is supported by sector benchmarks we could find — here, none with published values exist, so it is honestly unscored. The AI Score is our read on whether the preconditions for reaching a company sale or similar event are visible in the disclosed evidence — it is not a probability of success, and even companies with every precondition in place fail more often than they succeed, which is why crowdfunding only works as a small part of a diversified portfolio. The returns figure is an illustration from named benchmarks, not a forecast. Where something was not in the pack we reviewed, it did not lower any score — it appears in the questions list instead, so you can ask the company directly. The listing was reviewed by Sowefund, a licensed crowdfunding platform, before going live. Nothing in this memo is a recommendation.
The numbers that matter, and where each comes from
Valuation on the listing
€9.96MListing figureRaised in this campaign
€715KConfirmed publiclyCampaign objective
€600KConfirmed publiclyPre-seed round, autumn 2024
€2MConfirmed publiclyLetters of intent
18Company figureMAG25 price per unit
€300KCompany figureRevenue
None reportedNot in the packCash and spending rate
—Not in the packMinimum ticket
€1,000Platform termsAt a glance
✅ Three reasons to look closer
- The core technical milestone is real and independently documented: the MAG15 prototype completed a fully autonomous flight (takeoff, flight, landing) — reported as a world first by Grenoble INP, the Transpolis test site, and multiple press outlets, with the Airborne Wind Europe secretary general in attendance.
- The team checks out against public records: a co-founder with 25 years at Boeing and Airbus, a physicist co-founder (Polytechnique/ENS, ex-Thales) whose models underpin a decade of published academic work, and a CEO whose previous company (Agronergy) was sold to an infrastructure fund in 2021. Techstars invested in 2024.
- Funding momentum is verifiable: a €2M pre-seed round closed in autumn 2024 (private investors, banks and BPI), and this campaign passed its €600K objective — €715,019 raised at the review date.
⚠️ Three reasons for caution
- The company’s own numbers conflict: this campaign quotes an eventual electricity cost of €10–15/MWh, while the company’s own website quotes €90–110/MWh for the first product and €28–40/MWh for the large one; the campaign says "3 worldwide patents", the company’s website FAQ says "two granted patents".
- The campaign dates the world-first autonomous flight to August 2025; every public source we found dates it to 4 November 2025. The competitor list also includes Ampyx Power, a company declared bankrupt in May 2022.
- What a shareholder would actually own is not in the pack we reviewed: no share class, no ownership table, no sale-payout terms, no financials (revenue, spending rate, cash). The company is pre-revenue, and the utility-scale product that carries its €100M revenue plan is not funded by this round.
Deal terms.No terms were identified in the reviewed documents that would prevent a crowdfund investor from sharing in the upside. Note, however, that almost no share terms were in the pack we reviewed at all — the key ones appear in the questions section. Full mechanics are at the end of this memo.
🏢 What the company does
Wind Fisher, a French company based in Grenoble and founded in 2021, is developing a new kind of wind power: instead of a turbine on a mast, a helium-filled cylindrical wing flies at 300–500 metres, tethered to a ground station. The spinning wing is pushed sideways by the wind (the "Magnus effect"), and its pull on the cable drives a generator on the ground. The company reports that winds at this height are stronger and steadier, giving much more constant output than normal wind or solar.
The first customers, per the company, would be off-grid sites currently running diesel generators and businesses wanting cheaper, cleaner power — served by the MAG25 model (about 0.1–0.2 MW, priced at €300,000 per unit, sold directly or leased), planned to be ready within 12–18 months. A larger 2 MW model (MAG80, €1.7M per unit) is planned for 2027–2028 to serve utilities and data centers, where the company sees its main growth. Ongoing maintenance and performance contracts would add recurring income.
So far, the company has built and flown a 15-metre prototype fully autonomously — publicly documented — and reports 18 letters of intent from four continents worth over €180M in potential revenue, plus partnerships with EDF and Michelin’s Start2Prod programme (both of which rest on the company’s materials; we found no public record of either). This raise funds finishing the first commercial product and its European aviation certification (40%), four pilot deployments (30%), key hires (20%), and marketing (10%).
📈 The returns picture
The target
10x over 7–10 yearsThe company did not state its own return target, so this is the standard expectation for seed-stage investing, with the time horizon extended because the product still needs aviation certification and factory-scale production before it can sell at volume.
If reached
≈10x before feesIllustrative only: reaching the €107M sale value described below would pay roughly 10x before fees.
You investminimum ticket
€1,000
Your slice of the companyon a ~€10.68M post-money value
≈0.009%
Company sold for ≈€107M10x the post-money value
≈ €10,000
Most early-stage investments return little or nothing. Any platform fee, any priority payout held by other shareholders, and every later funding round would reduce what reaches you; none of these is described in the pack we reviewed.
Company value after this roundderived post-money
≈ €10.7M
Sale price neededfor 10x
≈ €107M
Yearly revenue that impliesat 2–4x revenue
€27–53M
The company’s own planrevenue in 2030
€100M
The company’s plan would clear the bar if fully achieved. No recorded sales of comparable airborne-wind companies with published values exist: Makani was shut down in 2020 and Ampyx went bankrupt in 2022.
How the company plans to get there
Per the campaign: finish and certify the MAG25, convert pilot projects into reference customers (50 more letters of intent by end-2027), then launch the 2 MW MAG80 for utilities and data centers (200 letters of intent in 2028, 20 customers that year, 300+ units and €100M revenue by 2030). The exit route named by the company is a sale to an energy major (EDF, Engie, TotalEnergies…), a wind-equipment maker (Siemens, Vestas, GE…), or a tech/data-center giant (Google, Microsoft, Amazon, Meta) — the campaign names candidate buyers but no comparable sale prices; the dossier records that no comparables table was provided in any material reviewed.
What has to be true
For a 10x payout on the listed price, the company must be worth roughly €107M when sold. Deeptech hardware companies typically sell for 2–4 times their annual revenue, so that means reaching roughly €27–53M of yearly revenue — which in turn requires the technology to work at commercial scale, pass certification, and sell in the hundreds of units. The company’s own plan (€100M revenue in 2030) would clear this bar if fully achieved.
If reached — potential returns
Illustrative only: reaching the €107M sale value described above would pay roughly 10x before fees. We found no recorded sales of comparable airborne-wind companies with published values to benchmark this against — the two best-known predecessors ended without a sale (Makani, shut down 2020; Ampyx, bankrupt 2022). Method: stage-standard seed target applied to the listed valuation; deeptech sale pricing of 2–4x revenue from the dossier’s benchmark block. These figures do not include dilution from future fundraising rounds, which would reduce actual returns — see the dilution section. Most early-stage investments return little or nothing.
⚠️ Why aim for this target?Startup investing is high risk. Most early-stage companies fail or return little. A small number of winners must make up for the losers, so each seed investment is typically aimed at roughly 10x — here over 7–10 years given the certification and scale-up path ahead.
💶 Is the price fair?
Valuation on the listing
€9,961,800Pre-money, per Sowefund’s own investor guide; confirm with the company.
Fairness (1–5)
Not scoredInsufficient comparables to assess.
A fairness score requires named independent benchmarks, and none with published values could be found: the nearest peer with public campaign data (Kitepower, Crowdcube, Aug 2025) did not disclose a valuation in accessible materials, Wind Fisher’s own €2M pre-seed (autumn 2024) valuation was not published, and no recorded sector exits with values exist. This is a statement about the available evidence, not about the price itself. There is therefore no benchmark picture for this deal.
📊 Score breakdown
Score = each category’s score weighted by its importance; weights sum to 100%.
Team capability · 82 · weight 19%Good
Founder backgrounds independently confirmed: 25 years Boeing/Airbus (CTO), Polytechnique/ENS physicist ex-Thales (CSO), CEO with a confirmed company sale in 2021; Techstars invested; 13 staff and a decade of academic collaboration. Gap: the board presented in the campaign is names-and-titles only, and one member’s role differs between the campaign (board) and the company website (CFO).
Technology risk · 60 · weight 15%Average
The hardest early step — a fully autonomous flight cycle — is done and publicly documented, a genuine sector first. But sustained electricity production at the claimed 60% load factor is not yet demonstrated publicly, the design must scale from a 15 m prototype to an 80 m machine, and the sector’s history (Makani shut down, Ampyx bankrupt after ~€50M) shows how capital-hungry that scale-up is.
Product-market fit · 60 · weight 15%Average
A clear product ladder (MAG15 → MAG25 → MAG80) matched to named customer segments, and the diesel-replacement pitch is concrete. But the first sellable product is 12–18 months away, and the central economics conflict within the company’s own materials: €10–15/MWh in this campaign versus €28–110/MWh on its own website.
Traction & growth · 58 · weight 15%Average
Real signals exist: 18 letters of intent across four continents (per the company), an overfunded campaign (€715K vs €600K objective), and confirmed national TV coverage. But letters of intent are non-binding, no revenue is reported, and the EDF "feasibility validation" milestone rests on the company’s materials alone.
Market size · 65 · weight 11%Average
The demand story is anchored in confirmed facts (data-center and AI power demand; OpenAI’s public 100 GW/year request). The company’s $8.9B-by-2031 market figure sits at the aggressive end of published estimates — independent reports range from ~$2.3B to trajectories consistent with ~$9B by 2031.
Competition · 60 · weight 8%Average
Public record supports the key claim: no other commercial player uses the Magnus approach, and active rivals (Kitepower, SkySails) operate smaller-power systems. But the sector’s two best-funded players failed before reaching scale, and the campaign’s competitor list includes one of them (Ampyx) as if still active.
Business model · 58 · weight 7%Average
Clear unit prices (€300K / €1.7M), named sales channels per segment, and a specific use of funds. What the disclosed plan does not show is how a €600–715K round funds a 12–18-month product-and-certification programme, and the larger MAG80 phase is explicitly beyond this raise.
Regulatory & compliance · 52 · weight 10%Average
Test flights run under authorized operations at a certified test site, which is a real start. But the European certification process (EASA) has not begun, no settled EU certification pathway for airborne wind systems yet exists, and certification is the gate to every commercial plan the company has.
AI score · 63 · weight 100%Average
The technology milestone and team are solidly evidenced; the path from prototype to paying customers, certification, and the funding it needs are the open preconditions.
How to read the score
| 85–100 · Excellent | All key preconditions for reaching an exit stage are evidenced and strong — rare at this stage |
| 70–84 · Good | Preconditions largely in place, with specific gaps — named in the questions section |
| 50–69 · Average | Meaningful preconditions missing or weakly evidenced |
| 30–49 · Weak | Several core preconditions absent, or the evidence points against them |
| 1–29 · Critical | Fundamental preconditions are not visible in the evidence |
🧾 The company’s money
The company is pre-revenue. Revenue, spending rate and cash are not in the pack we reviewed, so there is no picture of accounts against plan. What the campaign does disclose is how this round will be spent.
First commercial productMAG25 and its European aviation certification
40%
Pilot deploymentsfour pilots
30%
Key hires
20%
Marketing
10%
The larger MAG80 phase (2027–2028) is explicitly beyond this raise, so more fundraising is implied, with terms unknown.
This campaignat technological maturity
€10–15
Website: MAG80the 2 MW machine
€28–40
Website: MAG25the first product
€90–110
€0€30€60€90€120
The campaign’s headline figure is 2–4 times below the floor of the company’s own product-level figures. Both values are recorded and unresolved (question 10).
🔎 What we could check
Each key claim, and how far it could be checked. A missing item did not lower the score; it is a question to ask.
Company registration: French SAS in Grenoble, founded 2021Confirmed publicly
Founders’ backgrounds, including the CEO’s company sale in 2021Confirmed publicly
Techstars investment (2024) and the €2M pre-seed round (autumn 2024)Confirmed publicly
World-first autonomous flight of the MAG15 (public date: 4 November 2025)Confirmed publicly
TV coverage: TF1 (March 2026) and BFM Business (February 2026)Confirmed publicly
18 letters of intent worth over €180M in potential revenueCompany figure
EDF and Michelin Start2Prod partnershipsCompany figure
Performance and cost figures: 60% load factor, €10–15/MWhCompany figure
JEIR status behind the 50% tax reductionCompany figure
Share class, voting rights, ownership table, payout termsNot in the pack
Revenue, spending rate, cash; MAG25 unit cost; measured flight outputNot in the pack
❓ Questions to ask before investing
These are facts the company holds and can supply on request. They were not in the materials we reviewed — they may well exist in interviews, webinars or the company’s data room (a Q&A webinar with the co-founders is offered on the campaign page). The score above is based on what was available — these questions are how you close the gap.
- What exactly are investors buying — which type of share, with what voting rights, held directly or through a holding vehicle set up by the platform?
- Who owns what share of the company before and after this round (the "cap table"), how big is the employee share pool, and do any existing investors have priority payout or forced-sale rights (a "liquidation preference" or "drag-along")?
- Is the €9,961,800 valuation before or after this round’s money is added, and how was it set?
- What are the patent application/grant numbers, countries and filing dates behind the "3 worldwide patents" statement?
- On what date did the first fully autonomous flight take place, and can you share the flight log? (The campaign says August 2025; public records date the world first to 4 November 2025.)
- Is there a signed agreement with EDF, what does it cover, and is any payment attached? Same question for Start2Prod by Michelin.
- Of the 18 letters of intent, how many name a price and volume, how many include any payment or deposit, and what must happen for the first one to become a purchase order?
- At the MAG25 price of €300,000, what does one unit cost to build, what is the profit per unit, and how many can you build per year?
- How many hours has the MAG15 flown, and what electricity output and availability have you measured against the 60% target?
- Which electricity cost should investors use — the €10–15/MWh in this campaign or the €28–110/MWh on your website — and what assumptions separate them?
- What is your current monthly spending and cash position, how far does this round take you against the 12–18-month plan, and when and how much do you expect to raise next?
- Which EASA certification route are you targeting for the MAG25, and what happens to the timeline if certification takes longer than planned?
- Can you provide the documentation supporting the JEIR status behind the 50% tax-reduction claim?
📜 What you own
This is an equity campaign — you would become a shareholder in Wind Fisher SAS — and French tax labels on the listing (PEA-PME eligibility and the JEIR 50% income-tax reduction for French residents) both apply to share subscriptions. Beyond that, the pack we reviewed does not state which type of share you would receive, whether you would hold it directly or through a vehicle set up by the platform, or what say you would have in company decisions. These are the first questions in the list above. Whatever the structure, expect no ability to sell early: your return depends on the company eventually being sold or a similar event.
- June 2021 Wind Fisher founded in Grenoble happened
- Autumn 2024 €2M pre-seed from private investors, banks and BPI; Techstars invests happened
- 4 Nov 2025 World-first autonomous flight of the MAG15 prototype (the campaign says August 2025) happened
- 2026 This round: €715,019 raised against a €600,000 objective, valuation €9,961,800 now
- In 12–18 months MAG25 first commercial product ready (website: late 2027); EASA certification to start company plan
- End 2027 50 more letters of intent company plan
- 2027–2028 MAG80, the 2 MW machine, for utilities and data centers company plan
- 2028 200 letters of intent, 20 customers company plan
- 2030 300+ units and €100M revenue company plan
- 7–10 years Your money stays in until a sale or similar event memo’s assumption
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Information, not personal investment advice. The AI score rates the documents the platform publishes, can be wrong, and does not predict returns.
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