Alternatives to Cap-xx

Global leader in eco-friendly energy storage solutions, specializing in supercapacitors and fuel cell components for various industries.

Develops and manufactures innovative ultracapacitor technologies for energy storage solutions.

Maxwell Technologies was a leader in ultracapacitors and energy storage solutions.

Skeleton Technologies is an energy storage company developing advanced supercapacitors and energy storage solutions.

Revolutionizing advanced manufacturing with real-time quality assurance for friction stir welding.

Develops non-flammable, high-performance, low-cost sodium-ion batteries for energy storage.

Leading European battery manufacturer focused on sustainable production for electric vehicles and energy storage.

Developing and manufacturing next-generation battery cells for clean energy solutions.

Developing advanced battery technology for grid-scale energy storage.

Battery company focused on energy storage solutions.

Specializes in advanced manufacturing with AI and robotics.

Advanced manufacturing company specializing in Large Format Additive Manufacturing (LFAM) using robotic arms.

Building the world's first mass-produced portable nuclear generators for anywhere power delivery.

Software-first manufacturing company building a distributed network of AI-powered precision factories for critical industries.

Rodatherm Energy develops advanced thermal energy storage solutions for industrial applications.

Defense startup mass-producing affordable hypersonic missile systems for the U.S. military, founded by ex-SpaceX engineers.

Developing ultra-low power non-volatile memory technologies for AI, data centers, and edge computing.

Image-based predictive maintenance and condition monitoring for industrial assets.

Proprietary AI image processing using polarimetry for enhanced application data.

A global engineering, supply chain, and manufacturing solutions provider.

OptimalPlus provides end-to-end product analytics software for semiconductor and electronics companies, leveraging big data for manufacturing insights.

Japanese space tech startup developing hybrid rocket propulsion systems for satellite, launch, defense, and security applications.

Nano Dimension provides intelligent machines for the fabrication of Additively Manufactured Electronics (AME).

Revolutionizing EV battery manufacturing with solvent-free dry coating technology for lithium-ion battery electrodes.

Air defense startup focused on mass-producing low-cost interceptors for drones and missiles.

Lithium Energy is developing advanced battery technologies for electric vehicles and energy storage.

Aquarius Engines develops and manufactures a lightweight, compact, and highly efficient single-piston linear engine for various applications.

Pioneering energy intelligence technology for battery packs.

A premier player in precision technologies, specializing in critical safety components for solid rocket motors.

Develops and delivers holistic energy systems for commercial businesses, combining battery storage with intelligent energy management.

Designs, manufactures, and sells electric vehicles, battery energy storage, and solar energy products.

SILA develops advanced battery technology for electric vehicles and grid storage.

Revolutionizing grid-scale energy storage with sustainable, mechanical solutions.

Intelligent energy storage and grid services provider for commercial and industrial facilities.

Steelhead Composites designs and manufactures lightweight composite pressure vessels for hydrogen storage, CNG cylinders, and other high-pressure applications.

Exowatt develops modular, dispatchable solar energy systems for energy-intensive industries.

AI-powered platform for optimizing energy consumption and grid management.

Designs and manufactures flight-proven aerospace and defense systems, including rocket engines and hypersonic capabilities.

Global aerospace and defense company producing business jets, combat vehicles, submarines, and IT services.

Manufacturing advanced silicon-carbon composite anode materials for lithium-ion batteries.

Bespoke electrification solutions and clean-energy technologies for demanding applications across defense, marine, aerospace, and automotive sectors.

Develops AI-powered, multi-domain unmanned aerial systems for defense and commercial applications.

ZincFive is a specialized battery maker supplying data centers.

Leading provider of energy storage solutions, optimizing grid reliability and reducing electricity costs for customers.

Nostromo Energy develops advanced battery systems for grid-scale energy storage.

A leading semiconductor manufacturer providing advanced chip manufacturing services.

Developing AI and robotics for a safer, more sustainable future by amplifying human ability.

Dutch company developing and producing high-quality lithium-ion battery systems for electric and hybrid maritime propulsion.

Developer of Neocarbonix electrode technology for sustainable, high-performance lithium-ion batteries and energy storage.

AI-powered energy storage optimization for a sustainable future.

Provides software for space situational awareness and operations.

Operating the world's only commercial fleet of flight-ready MACH 2+ supersonic aircraft for space launch.

Designs and manufactures spacecraft solutions for government and commercial customers.

Enabling scalable, low-cost space-to-Earth laser communications.

Enabling the electronics industry to scale by transforming reliability and performance monitoring.