The most stubborn emissions come from the biggest machines. While passenger cars and delivery vans are steadily going electric, the diesel engines powering excavators, dump trucks, and military utility vehicles have largely stayed put. They are heavy, expensive, and built for punishing, remote work cycles where a dead battery is not an option. For a Swiss startup spun out of ETH Zürich, that’s not a reason to wait. It’s the wedge.
4QT is not trying to replace a 40-ton excavator overnight. Instead, the company is selling a hybrid and electric drivetrain system that can be retrofitted into existing diesel platforms or specified for new builds. Their core innovation is a novel electric motor they call the Double Rotor Machine (DRM), an axial-flux design that promises high power density without rare-earth magnets. Paired with modular LFP battery packs and control software, it forms what they term a “4-quadrant transmission,” letting a machine switch between pure diesel, pure electric, regenerative charging, and a combined boost mode [PERPLEXITY SONAR PRO BRIEF]. The claim is a roughly 30% reduction in emissions and fuel use for heavy utility vehicles, a number that gets the attention of procurement officers facing tightening public tender rules [S2 Xpeed Portfolio].
A bet on retrofit, not replacement
The strategic bet is clear: convince the giants of construction, mining, and defense that they can decarbonize incrementally. A fully electric, clean-sheet dumper might be a decade away for many fleets, but swapping a diesel transmission for a 4QT hybrid drivetrain could be a project for next year. This retrofit capability is the company’s key market entry point, lowering the barrier for OEMs and large fleet owners to begin their electrification journey without a multi-year, billion-dollar platform redesign [PERPLEXITY SONAR PRO BRIEF].
The early traction signals suggest this pitch is resonating in specific, high-value corridors. According to portfolio materials, 4QT has deployed four paid technology demonstrators and has secured letters of intent for over 450 annual vehicles [PERPLEXITY SONAR PRO BRIEF]. Their stated customer base is a telling mix of the pragmatic and the strategic: heavy-equipment OEMs, defense contractors, and government or army customers [PERPLEXITY SONAR PRO BRIEF]. Landing a first project with a major defense contractor or the Swiss Army,both hinted at in sources,provides not just revenue but a formidable reference case for the technology’s ruggedness [PERPLEXITY SONAR PRO BRIEF].
The team and the technical wedge
As an ETH Zürich spin-off, 4QT’s foundation is academic engineering rigor. Co-founders Marc Vetter (CEO) and Uygar Pala (CTO) both studied at the university, with Pala holding a PhD from the institution [S2Xpeed Blog]. The third co-founder, Christoph Lang, serves as CCO [LinkedIn]. Public details on prior commercial roles are sparse, but the team’s collective experience is described as being in heavy equipment and defense, a background that presumably informs their product focus and early customer relationships [PERPLEXITY SONAR PRO BRIEF].
The technical differentiator rests on the Double Rotor Machine. In a field crowded with radial-flux motors using neodymium magnets, the DRM’s axial-flux, rare-earth-free design aims for two advantages: lower cost volatility by avoiding critical minerals, and a fully recyclable architecture. The promised high power density is crucial for heavy machinery, where space and weight are at a premium. It’s a hardware moat built on a patent, not just software integration.
| Founder | Title | Key Background |
|---|---|---|
| Marc Vetter | CEO & Co-Founder | ETH Zürich background, co-lead of the spin-out [S2Xpeed Blog][4QT Imprint] |
| Uygar Pala | CTO & Co-Founder | PhD from ETH Zürich, Head of R&D and Technology [LinkedIn][S2Xpeed Blog] |
| Christoph Lang | CCO & Co-Founder | Co-founder focused on commercial operations [LinkedIn] |
Funding and the path to scale
To date, 4QT has raised a relatively modest war chest for a hardware-heavy climatetech venture. The company closed a CHF 1.9 million (approximately $2 million) pre-seed round in December 2023, led by Unruly Capital with participation from StartupGym, Ciri Ventures, Climate Capital, and Tiny VC [Startupticker, January 2024]. Some portfolio materials reference a higher total figure of “more than €5 million” [S2 Xpeed Portfolio], but the December 2023 pre-seed is the only round explicitly detailed in dated sources.
This funding level underscores the company’s current stage: it is capital-efficiently proving the technology and business model with demonstrators and LOIs, not yet gearing up for mass production. The next logical step is a larger seed or Series A round to fund the industrialization of the DRM, scale battery pack assembly, and build a sales engineering team capable of supporting global OEMs.
Where the wheels could come off
The ambition is significant, and so are the hurdles. 4QT is not just developing a component; it is asking conservative, safety-critical industries to integrate a novel powertrain into their most valuable assets. The risks are not hypothetical.
- The certification gauntlet. For defense and regulated construction equipment, certification and qualification processes are long, expensive, and non-negotiable. A delay here could burn years of runway.
- The industrial scaling cliff. Moving from a few hand-built demonstrators to hundreds or thousands of reliable, cost-competitive units is the classic valley of death for hardware startups. Their current funding is a down payment on this journey.
- The incumbent response. While no direct competitors are named in the sources, the established giants in automotive and industrial drives,companies like Bosch, Cummins, or ZF,are not asleep. They have vast R&D budgets and deep customer relationships to defend.
The company’s most plausible answer to these risks is its early, focused traction. By targeting retrofit applications first, they can generate revenue and prove reliability on a smaller scale before attempting to displace entire new vehicle designs. Letters of intent from serious buyers are a stronger shield than a prototype alone.
The next twelve months
The coming year will likely determine if 4QT is a fascinating research project or a credible future supplier. The milestones to watch are concrete: converting a meaningful portion of those 450 LOIs into firm purchase orders, announcing a production partnership with a manufacturing specialist, and securing the next funding round to cross the industrialisation chasm. A public deal with a named European OEM or defense department would be the strongest possible signal.
On the back of an envelope, the potential is vast. The global construction equipment market is valued at around €215 billion annually [S2 Xpeed Portfolio]. If 4QT’s system can capture even a fraction of a percent of that as a retrofit and new-build solution, the business becomes substantial. The climate math is simpler: if their 30% emissions reduction claim holds, every thousand machines retrofitted avoids thousands of tons of CO2 each year. For the bottom line, the unit economics will hinge on the cost of their motor and battery pack versus the diesel fuel and carbon penalties it saves.
The company 4QT must ultimately beat isn’t a startup. It’s the inertia of the diesel service truck parked at the mine head, the entrenched supply chain, and the risk-averse procurement officer. Their bet is that a better gearbox, a clever motor, and a pragmatic path forward can get that truck to start its electric motor first.
Sources
- [Startupticker, January 2024] Zurich-based startup 4QT has closed a CHF 1.9 million pre-seed funding round | https://www.startupticker.ch/en/news/december-2023/4qt-secures-1-9-million-in-pre-seed-funding
- [PERPLEXITY SONAR PRO BRIEF] 4QT company brief covering product, customers, and traction
- [S2 Xpeed Portfolio] 4QT portfolio page detailing market position and funding
- [S2Xpeed Blog] Background on 4QT's founding team and ETH Zürich origins
- [LinkedIn] Christoph Lang profile and company details
- [4QT Imprint] Confirmation of Marc Vetter as CEO