28 Best Quantum Computing Startups in Us to Watch in 2025

The Definitive Seedtable Ranking of Quantum Computing Startups in Us

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 28 start-ups with an aggregate funding of $1.7b. The average funding per company in this subset is $62.4m.

Last update to the database: Jul 15, 2025. See changelog.

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1

Funding Rounds

$50.0k

Money raised

HYPRES is a developer of superconducting microelectronics for defense, wireless, and optical network industries.

3

Funding Rounds

$54.1k

Money raised

ApexQubit is a biotechnology company that is harnessing a proprietary technology for discovery of new medicines to treat patients with undruggable diseases.

4

Funding Rounds

$18.0m

Money raised

Quantum Circuits Company is a company that is aiming to develop, manufacture, and sell the first practical and useful quantum computer using superconducting qubits. It is based in New Haven, Connecticut and founded in 2015 by Robert J. Schoelkopf, Michel Devoret, Luigi Frunzio and Brian W. Pusch.

Key people:

6

Funding Rounds

$107.6m

Money raised

Zapata Computing is a company developing quantum software and algorithms for business founded in 2017 by Christopher Savoie, Alán Aspuru-Guzik, Jhonathan Romero Fontalvo, Jonathan Olson, Peter Johnson and Yudong Cao.

9

Funding Rounds

$1.2b

Money raised

PsiQuantum is a company that is building a general-purpose silicon photonic quantum computer.

Key people:

1

Funding Rounds

$10.0m

Money raised

Brilliant is a San Francisco-based educational technology company.

Key people:

2

Funding Rounds

$11.0m

Money raised

Qunnect is a quantum communication company that is developing room-temperature, portable, modular technologies to support optical, long-distance and quantum-secured communication.

5

Funding Rounds

$62.1m

Money raised

Company developing and designing components and systems for scientific and industrial quantum applications.

5

Funding Rounds

$62.7m

Money raised

QC Ware Corp. is a company that offers quantum computing software solutions for enterprises.

Key people:

1

Funding Rounds

$2.7m

Money raised

Aliro Technologies (Aliro), a spinout of the NarangLab at Harvard University, makes software that facilitates user access to present day quantum computers.

Location:

Key people:

6

Funding Rounds

$650.0k

Money raised

QuSecure is a Menlo Park, California-based cybersecurity company that is developing quantum security applications, it was founded in 2019 by Skip Sanzeri, Rebecca Krauthamer, Dave Krauthamer, and Kosta Vilk.

3

Funding Rounds

$81.0m

Money raised

Atom Computing Inc. manufactures scalable quantum computers out of individual atoms.

3

Funding Rounds

$37.0m

Money raised

Quantum Xchange is a quantum fiber network that is based in the United States. It uses photons of light to physically transfer a shared secret between two entities.

2

Funding Rounds

Founded by experts in quantum physics and semiconductors, Equal1 aims to democratise quantum computing by making it accessible and affordable with its innovative quantum silicon technology.

1

Funding Rounds

$1.5m

Money raised

Company building "quantum accelerators” a type of computing system that work in conjunction with classical computers to solve problems that are impractical or impossible to solve on classical computer alone.

1

Funding Rounds

$1.9m

Money raised

SpeQtral is a company that is interested in developing quantum communication technologies

1

Funding Rounds

$1.8m

Money raised

Company developing decentralized quantum hardware for portable quantum processing.

1

Funding Rounds

$4.0m

Money raised

Strangeworks is a company offering a hardware-agnostic quantum computing platform founded in 2018 by Whurley.

1

Funding Rounds

QEYnet is a company that develops cybersecurity software to defend against quantum computers.

3

Funding Rounds

$56.4m

Money raised

SeeQC is a company developing and commercializing quantum technologies founded in 2019.

4

Funding Rounds

$4.3m

Money raised

Qubitekk is a company that is making quantum technologies for scientists, engineers, and developers.

1

Funding Rounds

$1.5m

Money raised

QbitLogic is a US-based advanced technology company that builds multi-purpose approaches and tools that enhance artificial intelligence and quantum computing.

1

Funding Rounds

$250.0k

Money raised

Polaris Quantum Biotech, Inc. is a company that combines machine learning, quantum computing, hybrid quantum and molecular mechanics simulations to help biotech companies discover drugs.

1

Funding Rounds

$7.3m

Money raised

EeroQ is a New York City-based quantum computing-focused company founded in 2016.

Key people:

1

Funding Rounds

$17.0m

Money raised

QuEra is a fault-tolerant quantum computers developer founded in 2018 by John Pena.

1

Funding Rounds

A company commercially manufacturing dilution refrigerators for superconducting quantum computers.

3

Funding Rounds

$6.5m

Money raised

QSimulate is a computer software company that aims to deliver the best algorithmic solutions to chemical and pharmaceutical industries.

Key people:

1

Funding Rounds

$40.0m

Money raised

Quantala is a knowledge company for quantum computing, founded by John Martinis. Its mission is to help build a fully functional quantum computer by identifying and solving technical roadblocks. The company is located in Santa Barbara, California and was formed in late 2020.

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