23 Best Propulsion Startups to Watch in 2025

The Definitive Seedtable Ranking of Propulsion Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 23 start-ups with an aggregate funding of $646.4m. The average funding per company in this subset is $28.1m.

Last update to the database: Feb 18, 2025. See changelog.

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Accion Systems logo

Accion Systems

Accion Systems is a company that provides in-space propulsion systems for satellites

7

Funding Rounds

$72.5m

Money raised

Aerojet Rocketdyne logo

Aerojet Rocketdyne

Aerojet Rocketdyne is a company that looks to innovate in industries of aerospace and defense markets

1

Funding Rounds

$67.0m

Money raised

Ursa Major Technologies logo

Ursa Major Technologies

A manufacturing company that specializes in producing solutions for microsatellite operations. It was founded in 2015 and is located in Berthoud, Colorado.

3

Funding Rounds

$108.5m

Money raised

HelicitySpace logo

HelicitySpace

HelicitySpace is a fusion propulsion and power company, developing technology for spacecraft.

1

Funding Rounds

$150.0k

Money raised

Orbion Space Technology logo

Orbion Space Technology

Orbion develops and manufactures plasma propulsion systems for small satellites.

2

Funding Rounds

$29.8m

Money raised

Apollo Fusion logo

Apollo Fusion

Apollo Fusion is a company that looks to provide satellite propulsion technologies

1

Funding Rounds

$10.0m

Money raised

Parabilis Space Technologies, Inc. logo

Parabilis Space Technologies, Inc.

Parabilis Space Technologies, Inc. is a San Marcos, California-based space technologies company founded in 2014

12

Funding Rounds

$4.6m

Money raised

Agile Space Industries Inc. logo

Agile Space Industries Inc.

Company building 3d printed rocket engines for small spacecraft

3

Funding Rounds

$13.4m

Money raised

Benchmark Space Systems logo

Benchmark Space Systems

Benchmark Space Systems is a company founded in 2017 by Matthew Shea.

4

Funding Rounds

$17.3m

Money raised

Morpheus Space logo

Morpheus Space

Morpheus Space is a space technology company developing next-generation spacecraft propulsion founded in 2018.

1

Funding Rounds

$30.0m

Money raised

Phase Four (company) logo

Phase Four (company)

Phase Four is a company founded in 2015.

3

Funding Rounds

$44.7m

Money raised

Cannae logo

Cannae

Cannae Holdings is a company that is engaged in managing and operating a group of companies and investments and making majority and minority equity portfolio investments in businesses.

3

Funding Rounds

$939.8k

Money raised

Protean Electric logo

Protean Electric

Protean Electric is an automotive technology firm. We are over 150 talented people based across the US, UK and China.

2

Funding Rounds

$124.0m

Money raised

Exotrail logo

Exotrail

Exotrail develops a miniaturised propulsion solution for small satellites.

2

Funding Rounds

$71.0m

Money raised

Pale Blue Inc. logo

Pale Blue Inc.

Pale Blue Inc. provides water propulsion systems for sustainable space development.

1

Funding Rounds

$651.0k

Money raised

Ienai SPACE logo

Ienai SPACE

Ienai SPACE is an electrospray-based propulsion system developer for small satellites founded in 2019.

1

Funding Rounds

$1.2m

Money raised

Magdrive logo

Magdrive

Magdrive is an aerospace propulsion founded in 2020.

2

Funding Rounds

$3.8m

Money raised

Adranos Inc logo

Adranos Inc

Adranos Inc is a propulsion company founded in 2017.

2

Funding Rounds

$8.3m

Money raised

Liquidpiston logo

Liquidpiston

Liquidpiston is a Bloomfield, Connecticut-based company founded in 2004.

3

Funding Rounds

$14.8m

Money raised

Jing-Jin Electric Technologies logo

Jing-Jin Electric Technologies

Jing-Jin Electric Technologies is a Beijing-based company founded in 2008.

3

Funding Rounds

$16.3m

Money raised

Porkchop logo

Porkchop

Porkchop is an in-space logistics enabled by a reusable vehicle founded in 2019.

1

Funding Rounds

Aurora Propulsion logo

Aurora Propulsion

Components for satellite attitude and orbit control, reliably mass-produced for manufacturers.

1

Funding Rounds

$2.0m

Money raised

1

Funding Rounds

$5.5m

Money raised