Telura exits stealth with 4M

"The problem with geothermal energy has never been the heat. The Earth's core sits at roughly 5,000 degrees Celsius, and the thermal gradient beneath the surface is consistent enough that, in principle, clean baseload power is available almost everywhere on the planet. The problem has always been the drilling. The deeper you go, the harder and hotter the rock, and the faster conventional drill bits wear out."

"Telura, a Munich-based deep-tech startup founded in 2025, is betting it has a way around that constraint. The company has emerged from stealth with a €4 million pre-seed round and a technology it calls electro-impulse drilling: instead of grinding through rock with rotating mechanical bits, the system fires high-voltage electrical pulses directly into the rock, fracturing it from within."

"Conventional rotary drilling becomes exponentially slower and more expensive as depth increases, because the heat and pressure degrade both the drill bit and the equipment around it. In hard granites several kilometres underground, exactly the formations that contain the superhot rock most valuable for geothermal energy, wear can render projects economically unviable before sufficient depth is reached."

Deep geothermal energy offers abundant clean baseload power from Earth's consistent thermal gradient, but conventional drilling becomes economically unviable at depths where temperatures are sufficient for viable projects. Mechanical drill bits degrade rapidly in hard rock formations at extreme depths and temperatures. Telura, a Munich-based startup founded in 2025, has emerged from stealth with €4 million in pre-seed funding to address this challenge. The company developed electro-impulse drilling technology that fires high-voltage electrical pulses directly into rock to fracture it from within, avoiding mechanical contact entirely. This approach eliminates equipment degradation caused by heat and pressure, potentially making deep geothermal projects economically feasible in previously inaccessible locations worldwide.

Read at TNW | Startups-Technology