# Spaceium Inc.

> Spaceium is a Y Combinator (S24) aerospace startup building unmanned refueling and servicing stations in orbit - what its founders call service stations along a 'space superhighway.' Its proprietary cryogenic storage system holds multiple metric tons of fuel for up to a decade in orbit without boil-off, and its high-precision robotic arm transfers propellant and performs repairs. The goal is to let spacecraft top up in space instead of carrying all their fuel from launch, extending missions and lowering costs for satellites, orbital transfer vehicles, and eventual Moon and Mars missions.

- **Founded:** 2023
- **Headquarters:** Long Beach, California, United States
- **Founders:** Ashi Dissanayake (Co-Founder & CEO), Reza Fetanat (Co-Founder & CTO)
- **Team size:** ~6 employees
- **Products:** Cryogenic fuel storage system, High-precision robotic arm / refueling actuator, Automated in-orbit refueling stations
- **Notable:** Graduated from Y Combinator's Summer 2024 batch., Closed an oversubscribed $6.3M seed round led by Initialized Capital in January 2025., Demonstrated a refueling actuator in orbit on SpaceX Transporter-15 with verified 0.003-degree rotation accuracy (~70x more accurate than robotic arms currently in space).

## Products & services

- **Cryogenic fuel storage system** — Proprietary system that stores multiple metric tons of cryogenic (and non-cryogenic) propellant in orbit for up to 10 years without boil-off.
- **High-precision robotic arm / refueling actuator** — Robotic arm and actuator for transferring propellant and performing spacecraft repairs; the actuator demonstrated 0.003-degree rotation accuracy in orbit, described as ~70x more accurate than robotic arms currently in space.
- **Automated in-orbit refueling stations** — Unmanned servicing depots designed to store 10-30 metric tons of fuel and refuel docking spacecraft, with planned inspection and repair services.

## Achievements

- Graduated from Y Combinator's Summer 2024 batch.
- Closed an oversubscribed $6.3M seed round led by Initialized Capital in January 2025.
- Demonstrated a refueling actuator in orbit on SpaceX Transporter-15 with verified 0.003-degree rotation accuracy (~70x more accurate than robotic arms currently in space).
- Developed a cryogenic storage system said to hold multiple metric tons of fuel for up to 10 years without boil-off.
- Secured customer bookings for missions in 2029 and 2030 ahead of first station launch.
- Announced a partnership with Space Machines Company for an early cryogenic refueling demonstration.

## Latest updates

- **2025-11** — Spaceium demonstrated its refueling actuator in orbit aboard SpaceX Transporter-15, reporting a verified 0.003-degree rotation accuracy.
- **2025-01** — Closed an oversubscribed $6.3M seed round led by Initialized Capital to build its in-space refueling network and grow the team.
- **2024-01** — Announced a partnership with Space Machines Company toward a first-ever cryogenic refueling mission in space.

## Links

- Website: https://spaceium.com
- LinkedIn: https://www.linkedin.com/company/spaceium-inc
- Twitter/X: https://twitter.com/SpaceiumInc

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Profile page: https://yespress.io/spaceium-inc-yc-s24
Published by YesPress — https://yespress.io
Last updated: 2026-07-30