Telura Emerges from Stealth with €4M to Revolutionize Deep Geothermal Drilling

Munich-based deep-tech startup Telura is making waves in the clean energy sector with its groundbreaking electro-impulse drilling technology, claiming it can unlock geothermal power almost anywhere on Earth.

The Geothermal Challenge: It’s Not About Heat, It’s About Drilling

The Earth’s core burns at approximately 5,000°C, and the thermal gradient beneath our feet remains consistently hot enough that clean baseload power should theoretically be available almost everywhere on the planet. Yet geothermal energy has remained frustratingly niche—not because of insufficient heat, but because of the economics of reaching it.

The deeper you drill, the harder and hotter the rock becomes. Conventional drill bits wear out exponentially faster as depth increases, and the economics turn unfavorable long before reaching the temperatures that would make a project worthwhile. In hard granite formations several kilometers underground—exactly where the most valuable superhot rock geothermal resources lie—wear can render projects economically unviable before sufficient depth is reached.

Enter Telura: Electro-Impulse Drilling Changes Everything

Telura, a Munich-based deep-tech startup founded in 2025, has emerged from stealth with a €4 million pre-seed round and what they claim is a revolutionary solution: electro-impulse drilling. Instead of grinding through rock with rotating mechanical bits, their system fires high-voltage electrical pulses directly into the rock, fracturing it from within.

The physics is well understood—ultra-high-voltage pulses create a plasma channel through the material, causing electrical breakdown and fracturing the rock from the inside out. Because no rotating bit grinds against the formation, there’s theoretically no wear on the cutting mechanism, and the system’s performance should not degrade with depth in the same way conventional drilling does.

This approach isn’t entirely new as a concept—academic research into electric impulse drilling has been ongoing for more than two decades, with institutions including TU Dresden and ETH Zurich among those working on it. What Telura argues is that the time has come to translate that research into deployable hardware.

The Technology Behind the Promise

Conventional rotary drilling becomes exponentially slower and more expensive as depth increases because heat and pressure degrade both the drill bit and the equipment around it. In superhot rock geothermal—typically defined as resources at depths where temperatures exceed 374°C—these challenges become prohibitive.

Telura’s electro-impulse approach avoids mechanical contact with the rock altogether. The system is designed to integrate with conventional drilling infrastructure rather than requiring an entirely new supply chain, which the company says is intended to reduce deployment risk and shorten the path to commercial operation.

The target application is closed-loop geothermal systems (CLGS), where a sealed network of pipes circulates a working fluid through deep hot rock without requiring a natural hydrothermal reservoir. Because the fluid stays contained within the loop, the system reduces environmental risk, simplifies permitting, and makes geothermal viable in geological settings where open-loop or traditional hydrothermal systems couldn’t work.

The Team: E-Fuels Veteran Meets Aerospace Engineer

Telura was co-founded by Philipp Engelkamp (CEO) and Andrew Welling (CTO)—an unusual pairing that investors have cited as central to their confidence in the project.

Engelkamp’s previous company, INERATEC, was a spin-out of the Karlsruhe Institute of Technology that became one of Europe’s better-known sustainable e-fuels businesses, raising over $129 million in Series B funding and earning recognition from the World Economic Forum and the Deutscher Gründerpreis. He brings more than a decade of experience scaling deep-tech companies in the energy transition space.

Welling brings a hardware background with engineering credentials across two of Europe’s most demanding development programs. He spent the majority of his career at Rolls-Royce before moving to Lilium, the electric aircraft startup, where he led the engineering team that brought the company’s first aircraft prototype to flight.

The combination of e-fuels commercialization and extreme hardware development is exactly the skill set needed to tackle one of clean energy’s most persistent challenges.

Backers and Validation: Serious Money Behind the Science

The €4 million pre-seed round was raised in Autumn 2025 and brings together a group of European deep-tech investors including Nucleus Capital, First Momentum Ventures, and Possible Ventures. Angel investors include Better Angle and Felix Jahn, founder of McMakler and Home24, a well-known figure in the German startup ecosystem.

Separately, Telura has agreed with SPRIND (Germany’s federal agency for breakthrough innovations) to validate the electro-impulse drilling technology under conditions designed to resemble real-world deployment. SPRIND has a mandate to support technologies that are too early-stage or too speculative for conventional funding mechanisms.

Martin Chaumet, Innovation Manager at SPRIND, stated: “Telura’s electro-impulse approach has the potential to become a cross-industry key enabling technology, and SPRIND supports Telura in validating this breakthrough beyond research toward real-world application.”

A recent job posting from First Momentum suggests Telura has raised approximately $5 million to date, indicating the SPRIND agreement and equity pre-seed combined.

Market Context: Geothermal’s Moment Has Arrived

Geothermal has rarely attracted the investment frenzy that has surrounded solar, wind, and batteries over the past decade. That’s beginning to change. Rising demand for 24/7 clean baseload power from AI data centers has focused attention on the sector in a way that intermittent renewable energy cannot satisfy.

Fervo Energy, the California-based enhanced geothermal startup backed by Google, raised $462 million at the end of 2025. In Europe, a clutch of deep-tech drilling companies has emerged seeking to crack open the continent’s geothermal potential, including Munich-based Hades Mining, which raised €5.5 million in pre-seed funding in mid-2025 using a laser-based approach and has since closed a further €15 million seed round.

Germany has also recently passed the Geothermal Energy Acceleration Act, legislation that simplifies permitting procedures for geothermal projects and is seen by the industry as a meaningful reduction in regulatory friction.

The Superhot Rock Opportunity

Telura’s thesis is that the deepest and hottest rock remains almost entirely untapped precisely because no drilling technology can reach it economically. The company cites research suggesting that tapping just 1% of the superhot rock resource could generate eight times the current worldwide electricity demand.

Whether electro-impulse drilling is the technology that unlocks it, and whether Telura’s team can make it work outside a laboratory, is what the SPRIND validation program is designed to answer. The stakes couldn’t be higher: if successful, this technology could transform geothermal from a niche renewable into a global baseload powerhouse.

Tags: geothermal energy, deep tech, electro-impulse drilling, clean energy, superhot rock, renewable power, Munich startup, energy transition, drilling technology, closed-loop geothermal, SPRIND, deep-tech investment, sustainable energy, baseload power, AI data centers

Viral Phrases: “unlock geothermal almost anywhere on Earth,” “no wear on the cutting mechanism,” “transform geothermal from niche to powerhouse,” “the drilling problem that’s held back clean energy,” “electro-impulse technology that could change everything,” “superhot rock geothermal’s untapped potential,” “the €4M bet on drilling’s future,” “Munich’s next deep-tech breakthrough,” “making geothermal economically viable everywhere,” “the physics is well understood, success is less certain”

,