Impulse Space ranks 35 on the Space 100 with a score of 78; Quantum Space ranks 89 with 65. Impulse Space is ahead on deployment, commercials, technology, positioning and leverage. Level on production, progress and firepower. Impulse Space is based in El Segundo, United States, Quantum Space in Rockville, United States. Impulse Space is named in 49 signals and Quantum Space in 29.
Impulse Space builds and operates Mira orbital transfer vehicles that deliver payloads to precise orbits and support rendezvous, satellite servicing and refueling missions.
Darker bar: ahead of the other company on that measure.
Impulse Space is a US in-space-mobility company (founded by SpaceX's Tom Mueller) whose Mira orbital transfer vehicles have flown commercially since 2023, with a Helios high-energy kick stage (GEO-direct) in development, and it supplies Vast's Haven-1 propulsion. It was admitted to NSSL Phase 3 Lane 1 in July 2026 (a first for orbital transportation), making it the in-space mobility category leader. Revenue is estimated at 10-100m (a $500M raise in 2026).
49 signals name Impulse Space.
41 facts on file.
Quantum Space is developing Ranger and Scout spacecraft for multi-orbit operations, on-orbit refueling, and propellant transfer to satellites in GEO.
Darker bar: ahead of the other company on that measure.
Quantum Space — co-founded by former acting NASA administrator Steve Jurczyk with Kam Ghaffarian IBX orbit — builds Ranger, a large maneuverable spacecraft platform for orbital mobility and space-defense missions, with a first flight targeted mid-2026 and explicit positioning toward cislunar operations and the Golden Dome-era defense market. It acquired electric-propulsion maker Phase Four (September 2025), bringing thrusters in-house, and announced in June 2026 it is going public via SPAC at a ~$1.2B valuation — capital and visibility well ahead of flight heritage. It is the most firepower-heavy pre-flight company in this batch.
29 signals name Quantum Space.
40 facts on file.
Impulse Space ranks 35 on the Space 100 with a score of 78; Quantum Space ranks 89 with 65. Impulse Space is ahead on deployment, commercials, technology, positioning and leverage. Level on production, progress and firepower. Impulse Space is based in El Segundo, United States, Quantum Space in Rockville, United States. Impulse Space is named in 49 signals and Quantum Space in 29.
Impulse Space ranks 35 on the Space 100 with a score of 78; Quantum Space ranks 89 with 65. Impulse Space is ahead on deployment, commercials, technology, positioning and leverage. Level on production, progress and firepower. Impulse Space is based in El Segundo, United States, Quantum Space in Rockville, United States. Impulse Space is named in 49 signals and Quantum Space in 29. Both company files carry the scores on eight measures, the facts with sources and the latest signals.
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