Antares
Agent54Agent Readiness: 54/100. Top 25%. Measured by StartupHub.ai. Median 41.Trust63Data Trust: 63/100. Above median. Measured by StartupHub.ai. Median 61.Antares develops advanced fission microreactors for reliable, deployable power in defense, space, and critical infrastructure environments.
About
Antares is a nuclear fission energy company that designs and manufactures compact microreactors. Their modular systems, such as the R1 model, utilize sodium heat pipes and TRISO fuel to produce up to one megawatt of continuous energy without requiring external resupply for up to three years. They aim to provide resilient energy infrastructure for mission-critical assets across terrestrial, maritime, and space environments.
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Public companies
BWX Technologies develops advanced micro modular reactors for terrestrial and space applications, focusing on safety and scalability, similar to Antares' offerings for defense and space.
Competing product: Small Modular Reactors
Lockheed Martin has explored compact fusion reactors and other advanced energy solutions that could compete with Antares' microreactors for defense and space applications.
Competing product: Compact Fusion Reactor
Northrop Grumman specializes in space nuclear power and propulsion systems, targeting lunar and deep space missions, which directly overlaps with Antares' focus on space-based energy.
Competing product: Space Nuclear Power Systems
Key facts
At-a-glance profile data
- Website
- antaresindustries.com
- Headquarters
- Torrance, United States
- Founded
- 2023
- Employees
- 154
- Total funding
- $578M (Series C)
- Business model
- B2B
Funding rounds
| Date | Round | Amount | Lead investors |
|---|---|---|---|
| 27 Jul 2026 | Series C | $470M | Paradigm, Caffeinated Capital |
| 2 Dec 2025 | Seed | $96M | Founders Fund, Shine Capital |
| 20 Mar 2025 | Undisclosed round | $10M | Breakthrough Energy Ventures |
| 4 Jun 2024 | Undisclosed round | $3M | Singular |
Tech stack
Detected on antaresindustries.com and in its job posts, last scanned 24 Oct 2026. Run your own scan
- Backend
- Python, Java
- Analytics
- Google Analytics 4
- CMS / Builders
- Framer
- Hosting
- AWS
- Hiring platform
- Ashby
- Integration capability
- Linear
Frequently asked
Is Antares trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Antares is 63 out of 100, a generally safe rating, based on site security posture, privacy practices, malware and phishing checks, and public reputation signals.
How much funding has Antares raised?
Antares has raised a total of $578M in funding. The most recent round on record is Series C.
How many employees does Antares have?
Antares has approximately 154 people on record.
Defense and Military
Antares' transportable microreactors are designed to provide resilient and autonomous power for military installations and critical defense infrastructure, addressing the DoD's need for energy independence in austere environments.
Space Exploration
Antares' microreactors are being developed for space applications, including lunar surface power and nuclear propulsion systems, aligning with NASA's goals for long-duration space missions and exploration.
Confirmed customer relationships for Antares. Speculative buyer-fit guesses are not shown.
