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louise boucher

T2 · manager / operator

Founder and solo GP of Sisyphus Ventures, a €20M fund backing ambitious European defense founders. Previously invested in defense at First Capital (France) and Northzone (London) since 2022, including angel investment in Helsing. Spent three years building defense portfolio before launching fund in December 2024.

8 calls·8 names·75% bull·last heard 7 months ago·Scaling Europe
track recordleaderboard →
hit rate
100%
avg alpha
+9.6pp
scored
1

top calls

best measured alpha vs SPY, then highest conviction · one per company
1st+9.6pp vs SPY
$PLTRPalantir

Palantir proves defense compounding model: wedge into data integration then expand across domains to multi-billion revenue

Palantir demonstrates the venture-scale defense model: start with a wedge product (data integration/intelligence), crack government go-to-market, then expand catalog across multi-domain (autonomous fighter jets, maritime) to generate uncapped multi-billion revenue — the blueprint for new primes.

Scaling Europe2026-03episode →
2ndhigh conviction
$HELSINGHelsingposition

Helsing angel investment validates new prime thesis: autonomous drones 10x cheaper than legacy systems

Helsing became France's first defense unicorn by building autonomous drone interception systems that are 10x cheaper, scalable, and smarter than traditional prime contractor offerings like Rheinmetall, proving the 'new prime' model works.

Scaling Europe2026-03episode →
3rdhigh conviction
$SISYPHUS-VENTURESSisyphus Venturesposition

Sisyphus Ventures launches €20M fund dedicated to kinetic defense, rejecting dual-use mandate to capture outsized returns

By explicitly targeting kinetic/offensive defense (missiles, explosives) rather than 'resilience' or dual-use, Sisyphus attracts LPs wanting unreserved exposure to the new prime wave and can move fast on categories other VCs filter out — a structural advantage in a category where speed to contract matters.

Scaling Europe2026-03episode →

most discussed · click a bar to filter

  • $STARK
  • $HELSING
  • $RNMBY
  • $PLTR
  • $QUANTUM-SYSTEMS

recurring themes

  • Defense Tech4
  • Geopolitics & Trade1
8 total
$STARK
Stark
MEDlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Stark achieves unicorn status signaling deepening European defense tech maturation
Stark's unicorn milestone reflects accelerating capital flows into European defense tech, though Louise notes the category has barely scratched the surface of needed products and contract volume.
"last week Stark became a unicorn. We've seen quantum systems tripled their valuation last year."
9:38
$HELSING
Helsing
HIGHlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.· position
Helsing angel investment validates new prime thesis: autonomous drones 10x cheaper than legacy systems
Helsing became France's first defense unicorn by building autonomous drone interception systems that are 10x cheaper, scalable, and smarter than traditional prime contractor offerings like Rheinmetall, proving the 'new prime' model works.
"my first angel check was in so 2024 a company called Hamatan AI. So which became the French the first French unicorn in defense doing really anything autonomous drones. So we call…"
2:40
$RNMBY
···
Rheinmetall
MEDlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Rheinmetall represents legacy prime vulnerable to 10x cheaper autonomous new primes
Traditional primes like Rheinmetall dominate with complex, expensive systems (fighter jets) now being displaced by cheap autonomous drones across all domains — the core investment thesis for backing new primes.
"People think about fighter jets which are the most obvious let's say um example which are now let's say replaced by cheap autonomous drones but really this is happening across all…"
1:00
$PLTR
···
Palantir
HIGHlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Palantir proves defense compounding model: wedge into data integration then expand across domains to multi-billion revenue
Palantir demonstrates the venture-scale defense model: start with a wedge product (data integration/intelligence), crack government go-to-market, then expand catalog across multi-domain (autonomous fighter jets, maritime) to generate uncapped multi-billion revenue — the blueprint for new primes.
"Palunteer or ND have something to show that so as a VC you invest in a company who's starting with a wedge let's say interception like drones intercepting other drones but really…"
5:26
$QUANTUM-SYSTEMS
Quantum Systems
HIGHlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Quantum Systems valuation triples as German drone maker wins major government contracts
Quantum Systems exemplifies the new prime playbook: ex-Palantir/Anduril talent combined with defense go-to-market expertise enabled rapid contract wins in UK, France, Germany within the last four months, driving valuation re-rating.
"last week Stark became a unicorn. We've seen quantum systems tripled their valuation last year."
9:38
$ANDURIL
Anduril
MEDlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Anduril founder pedigree (VR repeat founder) validates non-traditional backgrounds for defense new primes
Anduril's Palmer Luckey (repeat founder from VR) proves defense winners can come from any tech background if they pair visionary fundraising with day-one onboarding of defense sales and manufacturing experts — the team composition pattern Louise seeks.
"if you look at housing he was you know repeat founder of a gaming indust indry paloki from um Andreal was also a repeat funer from the VR space and we have many example like that."
12:32
$DSAVF
···
Dassault Aviation
LOWlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.
Dassault illustrates long-term dual-use reality: 30% revenue from private jets despite military fighter core
Even dedicated military platforms like Dassault's Rafale derive significant commercial revenue (private jets), proving most defense tech becomes dual-use long-term — but Louise argues founders must go military-first for first 3 years to win contracts.
"the tales the saffron even do which make the fighter jet let's say 30 revenue comes from private jets actually so longterm most technologies are you will use but in the next three…"
7:26
$SISYPHUS-VENTURES
Sisyphus Ventures
HIGHlouise boucher·Scaling Europe·7 months ago·Sisyphus Ventures €20m fund backing defence founders: Louise Boucher, Founder and Managing Partner.· position
Sisyphus Ventures launches €20M fund dedicated to kinetic defense, rejecting dual-use mandate to capture outsized returns
By explicitly targeting kinetic/offensive defense (missiles, explosives) rather than 'resilience' or dual-use, Sisyphus attracts LPs wanting unreserved exposure to the new prime wave and can move fast on categories other VCs filter out — a structural advantage in a category where speed to contract matters.
"I'm really against, let's say, dual as the beginning. I that's why I also pitched myself and the font at being like defense font. I didn't want to pitch it as resilience because I…"
0:25
9
Defense Techtailwind
European defense tech at inflection: first real startup contracts awarded in last 4 months across UK, France, Germany
After years of taboo then hype, European governments are finally awarding significant contracts to defense startups (Helsing, Quantum Systems, Stark) in the past four months — the category has barely scratched the surface of required autonomous systems across air, sea, land, and subsea domains.
8
Defense Techtailwind
New prime model requires military-first go-to-market for 3 years before dual-use expansion, not vice versa
Founders must focus 100% on military use cases initially to win government contracts and prove go-to-market; dual-use revenue (like Dassault's 30% private jets) emerges naturally later. VCs demanding dual-use from day one kill returns by constraining the wedge.
8
Geopolitics & Trademixed
Europe must buy US tech (Palantir cyber) for urgent rearmament while investing 5-10 year supply chain sovereignty — F-35 lock-in shows doctrine inertia
Strategic autonomy requires balancing immediate procurement (buy Palantir for cyber offense now) with long-term indigenous capacity. Denmark's F-35 purchase post-Greenland incident illustrates how locked-in doctrines (pilot training, maintenance) prevent rapid switching — new order plays out over decade, not weeks.
8
Defense Techmixed
European defense fragmentation (19 tank types vs US 1) forces startups to duplicate go-to-market teams per country, but creates export talent advantage
Fragmentation increases CAC (Helsing needs UK/Germany/France teams) but Europe's 30 of top 100 global defense companies, deep export networks (Middle East, India, US), and talent for 'boring' systems (radars, radios) position it to birth the next 10 global defense giants if capital matches urgency.
7
Defense Techtailwind
Non-dilutive defense financing gap: US has Founders Fund bank, JPM $1T facility; Europe still equity-dependent but catching up
Capital-intensive defense manufacturing requires non-dilutive debt/asset-backed financing. US has dedicated vehicles (Founders Fund bank, JPMorgan $1T fund); European startups currently rely on equity dilution but similar infrastructure will emerge, improving unit economics for new primes.