All Rankings

Top 100 Defense & Space Tech Startups in the US 2026

The most-funded defense tech and space tech startups headquartered in the United States, ranked by total capital raised.

Known total funding for 100 of 100 ranked companies: $73.2B.

Showing top 100 matching companies · Ranked by total funding raised

Use company data through the API.
Example request
curl "https://indexed.vc/api/v1/companies?industries=Defense+Tech,Space+Tech&countries=United+States&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API industry filter also matches related labels: Defense, Aerospace & Defense, Space, Aerospace.

The API has no company type filter, so public companies can appear; this list counts private companies only.

The API cannot leave out companies whose latest round is a grant, private equity or debt financing; this list does.

Data from Indexed.vcUpdated

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant, Private Equity, Debt Financing are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

1
Anduril

Anduril Industries is a defense technology company with a mission to transform US and allied mili...

Costa Mesa, United States1001–5000Artificial Intelligence, Defense Tech
Series G+Total funding$11.3BMay 2026
2
SpaceX

SpaceX designs, builds and launches advanced, reusable rockets and spacecraft with the goal of ma...

Hawthorne, United States10001+Aerospace, Space Tech
Series G+Total funding$8.7BJan 2025
3
Shield AI

Shield AI builds AI pilots and autonomous aircraft systems that help defense customers deploy int...

San Diego, United States1001–5000Artificial Intelligence, Defense Tech
Venture RoundTotal funding$4.6BMar 2026
4
Saronic

Saronic provides naval and maritime forces with intelligent Autonomous Surface Vessels at scale, ...

Austin, United States501–1000Artificial Intelligence, Autonomous Vehicles
Series DTotal funding$2.6BMar 2026
5
Stoke Space

Stoke Space develops Nova, a fully reusable rocket designed to provide affordable, responsive tra...

Seattle, United States51–200Space Tech, Industrials
Series ETotal funding$2.4BSep 2026
6
Sierra Space

Sierra Space is a commercial space company focused on creating a more accessible space economy.

Louisville, United States1001–5000Space Tech, Defense Tech
Series CTotal funding$2.2BMar 2026
7
Re:Build Manufacturing

Re:Build Manufacturing acquires and integrates industrial businesses to build a next-generation A...

Framingham, United States501–1000Advanced Manufacturing, Industrials
Venture RoundTotal funding$2.2BOct 2026
8
Zipline

Zipline operates an autonomous delivery service that transports medical supplies, food, and retai...

South San Francisco, United States501–1000Climate Tech, Defense Tech
Series G+Total funding$2.0BMar 2026
9
Hadrian

Hadrian builds AI-powered autonomous factories that manufacture precision components and complete...

Torrance, United States201–500Defense Tech, Manufacturing
Series DTotal funding$1.8BAug 2026
10
Valar Atomics

Nuclear energy startup building hundreds of reactors at one Gigasite for heavy industrial power a...

El Segundo, United States11–50Climate Tech, Defense Tech
Series BTotal funding$1.7BAug 2026
11
True Anomaly

Designs and builds autonomous spacecraft, mission software, and payloads for U.S. and allied spac...

Colorado, United States201–500Artificial Intelligence, Defense Tech
Venture RoundTotal funding$1.6BMay 2026
12
Castelion

Castelion develops affordable hypersonic strike systems for the U.S. military through rapid itera...

El Segundo, United States51–200Aerospace, Defense Tech
Series CTotal funding$1.5BAug 2026
13
Impulse Space

Space transportation company developing orbital transfer vehicles and last-mile delivery spacecra...

Redondo Beach, United States201–500Aerospace, Defense Tech
Extension RoundTotal funding$1.3BSep 2026
14
Relativity Space

Relativity Space designs and builds reusable rockets to make access to space more reliable and ro...

Los Angeles, United States501–10003D Printing, Aerospace
Series ETotal funding$1.3BJun 2021
15
Mach Industries

Mach Industries develops and manufactures unmanned aerospace and defense systems and decentralize...

Huntington Beach, United States51–200Defense Tech
Series CTotal funding$1.2BSep 2026
16
Astranis

Advanced satellites for high orbits.

San Francisco, United States201–500Space Tech, Industrials
Series ETotal funding$1.0BMay 2026
17
CHAOS Industries

CHAOS Industries is a technology company that is building the next generation of defense and crit...

Los Angeles, United States501–1000Aerospace, Defense Tech
Series DTotal funding$1.0BNov 2025
18
Skydio

By leveraging breakthrough AI, Skydio creates the world's most intelligent flying machines for us...

San Mateo, United States501–1000Artificial Intelligence, Drones
Series FTotal funding$1.0BApr 2026
19
K2 Space

Satellite manufacturing company founded by former SpaceX engineers, developing high-power, mega-c...

Torrance, United States51–200Space Tech, Defense Tech
Series DTotal funding$944.5MJul 2026
20
Divergent

Divergent develops an adaptive production system for designing, manufacturing, and assembling com...

Torrance, United States201–500Defense Tech, 3D Printing
Series ETotal funding$929.8MSep 2025
21
Boom Supersonic

Boom Supersonic develops Overture, a sustainable supersonic airliner, and Symphony, its dedicated...

Centennial, United States201–500Aerospace, Industrials
Extension RoundTotal funding$890.0MDec 2025
22
CesiumAstro

CesiumAstro designs and manufactures phased-array communications payloads, terminals, and satelli...

Austin, United States201–500Aerospace, Space Tech
Venture RoundTotal funding$882.6MFeb 2026
23
Axiom Space

Develops and operates commercial human spaceflight services and a commercial space station, and b...

Houston, United States501–1000Hardware, Space Tech
Extension RoundTotal funding$830.0MJun 2026
24
Xona Space Systems

Xona Space Systems is developing Pulsar, a low-Earth orbit (LEO) satellite constellation providin...

Burlingame, United States51–200Aerospace, Defense Tech
Series DTotal funding$707.7MOct 2026
25
Antares Industries

Antares Nuclear builds factory-produced fission microreactors that supply 100kWe to 1MWe of strat...

Los Angeles, United States51–200Defense Tech, Energy
Series CTotal funding$675.0MJul 2026