# Rocket Engine Manufacturers - webcentive

Source: https://www.webcentive.com/rocketengines/  
Format: Markdown version of the HTML page (same content, lookups and page chrome left out).

Liquid rocket engine and solid rocket motor makers, and in-space propulsion companies.  

More on webcentive: [Rockets](https://www.webcentive.com/rockets/) | [Rocket Companies](https://www.webcentive.com/rocketcompanies/)  

Each site has quick lookups: who owns it (whois), its history (Wayback Machine), a safety check, and one-tap questions to AI helpers. Grok asks you to tap Send first.  
Links last checked Oct 25, 2026.  

- **U.S. engine makers**
- [agilespaceindustries.com](https://www.agilespaceindustries.com/) - Agile Space Industries (thrusters and engines), Durango, Colorado | [X: @agile_space](https://x.com/agile_space)
- [blueorigin.com/engines](https://www.blueorigin.com/engines) - Blue Origin engines (BE-4 for New Glenn and Vulcan, BE-3). Site blocks automated checks. | [X: @blueorigin](https://x.com/blueorigin)
- [firehawkdefense.com](https://firehawkdefense.com/) - Firehawk Aerospace (hybrid rocket engines, 3D-printed fuel), Texas | [X: @FirehawkAero](https://x.com/FirehawkAero)
- [l3harris.com](https://www.l3harris.com/) - L3Harris (Aerojet Rocketdyne: RS-25, RL10, AR1), Melbourne, Florida | [X: @L3HarrisTech](https://x.com/L3HarrisTech)
- [moog.com](https://www.moog.com/) - Moog (space propulsion and thrusters), East Aurora, New York | [X: @Moog_Inc](https://x.com/Moog_Inc)
- [northropgrumman.com/what-we-do/space](https://www.northropgrumman.com/what-we-do/space) - Northrop Grumman space systems, including the solid rocket motors and boosters it builds for launch vehicles and missiles. | [X: @northropgrumman](https://x.com/northropgrumman)
- [spacex.com/vehicles](https://www.spacex.com/vehicles/starship/) - SpaceX Starship page. SpaceX builds its own Raptor and Merlin engines in-house. | [X: @SpaceX](https://x.com/SpaceX)
- [ursamajor.com](https://www.ursamajor.com/) - Ursa Major (Hadley, Draper, solid rocket motors), Berthoud, Colorado | [X: @ursamajortech](https://x.com/ursamajortech)
- [vastspace.com](https://www.vastspace.com/) - Vast (acquired Launcher and its E-2 engine work in 2023), Long Beach, California | [X: @vast](https://x.com/vast)
- [x-bow.com](https://www.x-bow.com/) - X-Bow Systems (solid rocket motors), Austin, Texas. Site blocks automated checks. | [X: @XBowSystems](https://x.com/XBowSystems)
- **European engine makers**
- [ariane.group](https://www.ariane.group/) - ArianeGroup (Vulcain 2.1, Vinci, Prometheus), Airbus and Safran joint venture | [X: @ArianeGroup](https://x.com/ArianeGroup)
- [avio.com/propulsion](https://www.avio.com/) - Avio (P120C solid motors, M10 engine), Italy | [X: @Avio_Group](https://x.com/Avio_Group)
- [nammo.com](https://www.nammo.com/) - Nammo (space propulsion and motors), Norway; owned by the Norwegian state and Patria (Finland) | X: none found
- [pangeapropulsion.com](https://www.pangeapropulsion.com/) - Pangea Aerospace (aerospike engines), Barcelona, Spain | X: none found
- [safran-group.com](https://www.safran-group.com/) - Safran (space propulsion, ArianeGroup co-owner), France. Site blocks automated checks. | [X: @SAFRAN](https://x.com/SAFRAN)
- **Asian engine makers**
- [ihi.co.jp](https://www.ihi.co.jp/en/) - IHI (rocket engines and solid motors, IHI Aerospace), Japan | X: none found
- [mhi.com](https://www.mhi.com/) - Mitsubishi Heavy Industries (LE-9 engine, H3 rocket), Japan | [X: @MHI_Group](https://x.com/MHI_Group)
- **In-space propulsion**
- [benchmarkspacesystems.com](https://www.benchmarkspacesystems.com/) - Benchmark Space Systems (in-space propulsion), Vermont | [X: @BenchmarkSpace](https://x.com/BenchmarkSpace)
- [busek.com](https://www.busek.com/) - Busek (electric propulsion), Natick, Massachusetts | [X: @BusekPropulsion](https://x.com/BusekPropulsion)
- [dawnaerospace.com](https://www.dawnaerospace.com/) - Dawn Aerospace (green thrusters, Aurora spaceplane), New Zealand and Netherlands | [X: @DawnAerospace](https://x.com/DawnAerospace)
- [exotrail.com](https://www.exotrail.com/) - Exotrail (electric propulsion and space tugs), France | [X: @exotrail](https://x.com/exotrail)

Number of links: 21  
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