ISPTech has closed its seed round, backed by First Momentum VC, to accelerate development and qualification of our scalable spacecraft propulsion systems for the NewSpace market. This is a milestone. Worth explaining in detail — not just what it means for ISPTech, but what the engineering roadmap actually looks like from here.
Why Seed Funding Now
The timing is deliberate. The NewSpace propulsion market for the 10-50 kg satellite class is structurally underserved by existing suppliers. The incumbents — primarily US and UK firms — serve large-satellite programmes with propulsion systems that are technically qualified but not designed for the cost structure and delivery cadence constellation operators require.
We've seen this gap directly in conversations with constellation operators who are designing their Gen 2 and Gen 3 platforms and cannot find a European-qualified monopropellant supplier with a credible path to 200+ units per year delivery capacity at the price points their satellite economics require. That is the market gap ISPTech was founded to close.
The seed funding provides 18-24 months of runway to complete TRL 6 qualification of our primary thruster product line, establish series production infrastructure at our Lampoldshausen engineering facility, and begin the customer qualification integration work that constellation operators require before frame contract awards.
First Momentum VC: Why This Partner
First Momentum VC focuses on deep technology startups in Germany and Europe, with a track record in hardware-intensive engineering companies. The decision to take investment from a deep-tech-focused fund rather than a generalist growth fund was intentional: we need investors who understand 18-month qualification campaigns, who are not surprised when a thermal vacuum test runs 3 weeks over schedule, and who value engineering rigour over growth metrics in the seed phase.
First Momentum's portfolio and network include several European aerospace tier-2 suppliers, which provides ISPTech with a direct introduction path into procurement organisations that will be relevant when we begin series production conversations.
Engineering Roadmap
The seed funding funds three parallel workstreams:
- 1N thruster qualification (TRL 4 to 6): Complete the ECSS-E-ST-35-01C qualification campaign on the ISPTech-100 thruster, targeting 220-236 s Isp, 0.5-1.1 N thrust range, and compatibility with both ADN and HAN formulation propellants. Campaign duration: approximately 14 months, with hot-fire testing at DLR Lampoldshausen test stands.
- Series production infrastructure: Establish automated inspection, propellant loading, and acceptance test bench at our Lampoldshausen facility, targeting 50 units/year initial capacity with a clear scale path to 200+ units/year.
- Customer integration programme: Two anchor customers in the 6U-50 kg satellite class, with whom we will conduct interface verification, environmental compatibility testing, and propulsion system integration support from their phase B through to launch readiness review.
Hiring Focus
The engineering hiring plan for the next 12 months focuses on four roles:
- Propulsion test engineer with liquid propulsion system background and experience operating hot-fire test stands
- Systems engineer with spacecraft-level integration experience and familiarity with ECSS compliance documentation
- Manufacturing engineer with precision assembly experience in a regulated aerospace environment (EN 9100 or equivalent)
- Business development lead with direct network access to European constellation operator procurement organisations
We are a small team building in an environment where individual hire quality has direct, visible impact on programme execution. We do not hire generically. If any of these roles fits your background, reach out directly through our contact page.
What Success Looks Like at 24 Months
Concrete targets: TRL 6 on the ISPTech-100 thruster by month 18. First frame contract for series delivery signed by month 20. Series production facility fully qualified and operational by month 24. First deliveries to anchor customers by month 22-24. These are engineering programme targets. Not aspirations. We will report against them.
For the technical details behind these targets, see our propulsion systems page. For partnership and procurement enquiries, use our contact form.
What We've Learned So Far
Four insights from the pre-seed period that shaped how we structure the programme:
First: constellation operators evaluate propulsion suppliers on delivery schedule reliability as highly as they evaluate on performance. A thruster that meets spec but ships 6 weeks late breaks a satellite integration schedule that has no slack. Our production architecture is designed around schedule predictability, not just unit performance.
Second: European supply chain control is a real procurement criterion for several national and institutional customers. Every supplier component that carries ITAR risk is a procurement friction point. We have deliberately chosen ADN-based propellant as our primary qualification basis specifically because it keeps our supply chain within the EU. That decision costs us marginal performance versus HAN-based alternatives, but it opens customer segments that are closed to ITAR-exposed suppliers.
Third: in our experience, the most common reason seed-stage deep-tech companies fail is not technology risk but customer timing risk. We secured our first anchor customer commitments before closing the seed round. Those commitments are the market validation that justifies the qualification investment timeline. No anchor customers at seed close = speculative technology investment. That is not what we are building. Simple as that.
Fourth: the Lampoldshausen location is not incidental. Proximity to DLR test infrastructure, the regional aerospace supplier network, and the German aerospace talent pool are strategic assets. We could have incorporated cheaper. We could not have accessed equivalent infrastructure cheaper.
