InSpacePropulsion Technologies(ISPTech), a German space tech company developing propulsion
systems designed to enable fast and agile in-orbit manoeuvring, has raised €5.5
million to advance deployment of its non-toxic propulsion technologies for
operational missions. The round was led by Join Capital, with participation
from High-Tech Gründerfonds (HTGF), Faber, First Momentum Ventures, Lightfield
Equity, Final Frontier Liftoff, the German Aerospace Center (DLR), and Start-up
BW Seed Fonds, among others.
As satellite constellations grow denser and missions become
more complex, spacecraft must reliably change orbits and avoid collisions with
minimal margin for error. Existing propulsion solutions often lack the agility,
responsiveness, and thrust required for these demands.
At the same time, regulatory pressure is accelerating the
phase-out of conventional systems that rely on highly toxic propellants such as
hydrazine, prompting satellite manufacturers to reassess propulsion choices and
seek safer alternatives.
ISPTech is positioning its technology to address these
trends. The company is developing spaceflight-ready propulsion systems and
expanding commercial engagement with satellite manufacturers and mission
operators, with potential applications also spanning defence, in-orbit
servicing, and refuelling.
Dr. Lukas Werling, CEO and co-founder of ISPTech, said that although
reusable rockets have improved access to space, future growth will depend on
improved in-orbit mobility. He noted that the company is focused on building
propulsion systems intended to support a more capable and scalable space
ecosystem.
ISPTech’s portfolio includes the HyNOx and HIP_11
propulsion systems, positioned as non-toxic alternatives for agile in-orbit
manoeuvring across spacecraft classes.
The company is currently preparing two customer missions,
with its first small-satellite mission using ISPTech propulsion scheduled for
launch in 2026. CubeSat units are in acceptance testing, and the company
reports early customer traction. HIP_11 and orbital refuelling development are
also supported by ESA-backed projects.
Long-term, ISPTech aims to expand spacecraft mobility to
enable more flexible satellite operations and future in-orbit services.