What they do:
Building the world's first fusion power plant
Quick facts:
HQ: Seattle, WA, United States
Top Hard Tech Startups
This list has 143 startups and was last updated on Oct 15, 2026. 42 of them are hiring right now. Biggest hubs: San Francisco (70), Los Angeles (9), and Boston (8). Largest teams: Helion Energy, SRTX, and SiPhox Health. Latest round: CircuitHub raised $25.5M (May 13, 2026).
143 startupsPage 1 of 4
What they do:
Powering a better future for textiles.
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CircuitHub
Hiring
What they do:
On-Demand Electronics Manufacturing
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HQ: London, United Kingdom
Funding:
$25.5M · Equity · May 2026
SiPhox Health
Hiring
What they do:
At-Home health monitoring with silicon photonic chips for data centers
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HQ: Boston, MA, United States
Atomic Industries
Hiring
What they do:
Software orchestrated mass production of plastics
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HQ: Cleveland, OH, United States
Albedo
Hiring
What they do:
Full-stack VLEO satellite missions
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HQ: Denver, CO, United States
What they do:
Physical AI for Warehouses and Factories
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Volta Labs, Inc.
Hiring
What they do:
Unlocking the utility of genomics for the world.
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HQ: Boston, MA, United States
What they do:
We make cancer care at home possible.
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HQ: Galway, Ireland
What they do:
Bluetooth to Space
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HQ: Las Vegas, NV, United States
What they do:
Modular carbon capture
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HQ: Detroit, MI, United States
What they do:
Making all ships robots.
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HQ: Houston, TX, United States
What they do:
CRISPR powered Diagnostics with results in minutes.
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HQ: San Diego, CA, United States
Polymath Robotics
Hiring
What they do:
General Autonomy for Industrial Vehicles
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HQ: San Francisco, CA, United States
What they do:
Turning space into a transportation layer for Earth
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HQ: Los Angeles, CA, United States
What they do:
High-res hyperspectral pictures of Earth from space
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HQ: Edmonton, Canada
Forge Automation
Hiring
What they do:
Software Enabled CNC Parts Supplier
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What they do:
Enabling li-ion batteries to charge ultra fast without compromising…
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What they do:
Advano is a battery technology company that improve the longevity of…
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HQ: New Orleans, LA, United States
What they do:
Multicolor lasers for ultrafast data transmission
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HQ: Lausanne, Switzerland
Meticulous
Hiring
What they do:
Automated e2e screenshot testing without writing or maintaining tests
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HQ: London, United Kingdom
What they do:
Underwater robotic vehicles that collect battery metals responsibly
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HQ: Los Angeles, CA, United States
What they do:
Decarbonized heat and power cheaper than fossil fuels
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What they do:
Carbon capture equipment for ships
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HQ: London, United Kingdom
Andson Biotech
Hiring
What they do:
Empowering Mass Spec for Biotech and Beyond
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HQ: Atlanta, GA, United States
Andromeda Surgical
Hiring
What they do:
Autonomous surgical robots
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HQ: San Francisco, CA, United States
Starcloud
Hiring
What they do:
Data centers in space
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HQ: Seattle, WA, United States
Reditus Space
Hiring
What they do:
Reusable Satellites
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HQ: Atlanta, GA, United States
Odys Aviation
Hiring
What they do:
Vertical takeoff and landing aircraft for major airlines
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HQ: Los Angeles, CA, United States
AirMyne
Hiring
What they do:
Building systems to remove carbon dioxide from air at industrial scale
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HQ: San Francisco, CA, United States
Kalam Labs
Hiring
What they do:
Autonomous Stratospheric UAVs
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HQ: India
AstroForge
Hiring
What they do:
We Mine Asteroids
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HQ: Los Angeles, CA, United States
Godela
Hiring
What they do:
AI Physics Engine to replace simulations and prototypes
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HQ: San Francisco, CA, United States
What they do:
Building AGI that can innovate.
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HQ: Remote
What they do:
Last-mile delivery for satellites.
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HQ: Buenos Aires, Argentina
Vena Vitals
Hiring
What they do:
A small sticker that monitors blood pressure continuously
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HQ: Irvine, CA, United States
Questions and answers
How many startups are on this list?
There are 143 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
42 of them are hiring right now, including CircuitHub, SiPhox Health, and Atomic Industries.
Which of them have the largest teams?
By team size: Helion Energy (150 employees), SRTX (150 employees), and SiPhox Health (63 employees).
Which of them raised money recently?
Latest rounds: CircuitHub — $25.5M Equity (May 2026).
Where are they based?
The biggest hubs are San Francisco (70), Los Angeles (9), and Boston (8).