Which quantum startup is growing the fastest?

Why is the fastest-growing quantum startup so hard to call right now?

Quantum startups are growing fast today, but funding is outrunning the actual quantum market so dramatically that the biggest financing round tells us very little about who is building the fastest-growing business.

QED-C’s latest State of the Global Quantum Industry report puts the 2025 quantum-technology market at about $1.9 billion, including roughly $1.4 billion for quantum computing. In the same year, private venture investment reached $4.9 billion, up 192%, while the pure-play quantum workforce grew 14% to 16,482 people. Money was coming in more than ten times faster than jobs were being added.

McKinsey measures the funding boom more broadly and gets an even larger number: $12.6 billion invested in quantum-technology startups in 2025, 6.3 times the previous year. Roughly 60% went into the ten biggest deals. The definitions differ, so the two funding totals should not be compared directly. They still point to the same strange setup: investors are pouring money into a small group of companies far faster than customers are buying quantum computing.

A startup can add several billion dollars of valuation while its main machine remains years away. Another can double its staff while generating little recurring revenue. A third can sell actual systems from a much smaller funding base. To find the fastest-growing startup, we need to see what is actually getting bigger inside the business.

Which quantum companies still count as startups today?

Quantinuum, IQM, Xanadu, Infleqtion and Pasqal are public companies now, so we exclude them from the private quantum-startup race.

This cutoff has changed quickly. Infleqtion listed in February, Xanadu in March, Quantinuum in June, IQM in July, and Pasqal joined them more recently after completing its business combination and starting public trading. All five remain useful benchmarks because they disclose revenue, backlog and deliveries that private companies usually keep hidden.

The private field is therefore narrower than it looked a year ago. QuEra, PsiQuantum, Atom Computing, Photonic, Quantum Motion, Alice & Bob, SpinQ and Origin Quantum are among the serious contenders. Smaller companies may be growing even faster from tiny bases, but we cannot make a defensible global comparison when customer, workforce and financing data barely exist.

Company	Status today	Why it matters here
QuEra Computing	Private	Fast hiring, installed neutral-atom hardware, large contracts
PsiQuantum	Private	Biggest capital and infrastructure build-out
Atom Computing	Private	Rapid hiring and commercial 1,200+ qubit systems
SpinQ	Private	Very fast disclosed order growth from a smaller base
Origin Quantum	Private	Huge recent Chinese financing and valuation jump
Photonic	Private	$2B valuation and heavy funding
Alice & Bob	Private	Fast team growth and first complete system
Quantum Motion	Private	Large Series C and first full-stack silicon system
Quantinuum, IQM, Xanadu, Infleqtion, Pasqal	Public	Commercial benchmarks rather than startup contenders

What does “growing fastest” even mean in quantum computing?

For a private quantum startup, “growing fastest” should mean that several parts of the business are getting bigger together: the team, customer deployments, orders or contracts, distribution and technical capability.

Revenue would normally settle the argument. Private quantum companies rarely give us enough of it. Hardware contracts arrive in lumps, government procurement can dominate a year, cloud revenue is seldom broken out, and some companies are building machines that customers cannot use yet.

Headcount becomes useful when we compare the same source over the same period. Contracts become more convincing when a machine is actually installed. Funding shows how aggressively a company can expand research and manufacturing. Technical milestones tell us whether that expansion rests on hardware that is really progressing. We need the combination.

Physical-qubit counts also need care. Neutral atoms, photonics, superconducting circuits, silicon spins and cat qubits have different error profiles and different paths toward logical qubits. Ranking companies from the largest physical-qubit number would give us a very different article and a fairly weak measure of business growth.

So we are looking for the private company where people, customers, deployed hardware and credible technical capacity are expanding together.

Is PsiQuantum actually growing fastest because it raised $1 billion?

PsiQuantum clearly wins the capital-and-infrastructure race right now, although most of the commercial payoff sits inside utility-scale systems that are still under construction.

Its $1 billion Series E valued PsiQuantum at $7 billion and gave the company enough capital to push ahead with utility-scale sites in Chicago and Australia. Chicago broke ground in 2025, while construction started at the Moreton Bay site in June 2026. Few quantum startups are attempting anything remotely similar in physical scale.

DARPA provides an unusually strong outside check. The agency moved PsiQuantum into Stage C of its Quantum Benchmarking Initiative, the final verification stage, alongside Microsoft. In July 2026, PsiQuantum signed an expanded $125 million DARPA agreement covering testing and evaluation. Two months earlier, the US Department of Commerce had signed a letter of intent for up to $100 million of proposed CHIPS incentives.

The organization itself is getting much larger. Revelio Labs’ comparable first-quarter estimates move PsiQuantum from 461 employees in 2025 to 597 in 2026, about 30% growth. That means roughly 136 additional people in a year, twice QuEra’s absolute increase.

PsiQuantum today looks like the biggest industrial build-out among private quantum companies. But that is a slightly different race. Hundreds of people and enormous infrastructure are being assembled ahead of the utility-scale computers that are supposed to generate the eventual payoff. QuEra has a stronger case once we require visible customer deployment today.

If you want more recent data on this point, please see our latest quantum computing market report.

Is QuEra hiring faster than the other quantum startups?

QuEra is currently hiring faster than the major private quantum startups we can compare through one consistent workforce dataset.

Using Revelio Labs’ first-quarter snapshots, QuEra went from 83 employees in 2025 to 151 in 2026. We calculate growth of about 82%. Atom Computing comes next at roughly 61%, Alice & Bob at 41%, PsiQuantum at 30%, Quantum Motion at 20% and Photonic at 10%.

The gap is big. QED-C says the pure-play quantum workforce grew 14% across the industry in 2025. QuEra’s comparable one-year increase was almost six times that pace. QuEra itself said its global workforce doubled during 2025, pointing in the same direction even though its internal count covers a slightly different period.

More than $230 million of financing completed in 2025 gave QuEra room to support that expansion. Investors included Google and SoftBank Vision Fund 2, with NVIDIA’s NVentures later joining the financing.

The latest Revelio release showed 75 active QuEra job postings and said active postings had more than doubled from the previous year. Hiring therefore appears to be continuing rather than fading after the financing round.

Revelio uses workforce intelligence rather than company payroll records, so 151 should be read as an estimate. Using exactly the same source and quarterly endpoints for every company still gives us a useful comparison.

Private company	Q1 2025 employees	Q1 2026 employees	Our calculated growth
QuEra	83	151	82%
Atom Computing	77	124	61%
Alice & Bob	162	229	41%
PsiQuantum	461	597	30%
Quantum Motion	91	109	20%
Photonic	169	186	10%

Is QuEra turning its rapid growth into real quantum-computer deployments?

QuEra’s hiring surge has already turned into shipped hardware and paid procurement, which is the main reason we take the headcount growth seriously.

Japan’s AIST awarded QuEra a ¥6.5 billion contract, worth about $41 million when announced, for a neutral-atom quantum computer to sit alongside the ABCI-Q supercomputer. The official procurement record confirms a price of ¥6,499,999,999. QuEra deployed the Gemini-class system in 2025, and its current materials say the machine became operational in early 2026.

Aquila had already given outside users access to QuEra hardware through Amazon Braket since 2022. Gemini took the company into on-premises gate-based hardware. The AIST project then required QuEra to install that machine beside a major GPU supercomputer and support a hybrid computing environment.

Distribution is expanding too. QuEra’s deeper AWS relationship is supposed to put Libra, its planned fault-tolerant system, on Amazon Braket in 2028. The company also added a partnership with Zapata Quantum in August 2026 around applications and commercial use cases.

One of the freshest operational developments came later that month. QuEra said an Anthropic Claude agent had learned to control a laser subsystem inside one of its machines, recovering the subsystem in seconds where an expert would normally need minutes. We count that as an operations improvement rather than new customer demand. A commercial quantum computer eventually has to stay calibrated without a physicist constantly adjusting every subsystem.

QuEra has now moved through cloud access, an on-premises product and a national-lab deployment tied to a large procurement. That progression makes the rapid hiring much easier to believe.

If you want more recent data on this point, please see our latest quantum computing market report.

Is QuEra’s technology actually keeping up with its growth?

QuEra’s technology is keeping pace with the company’s rapid expansion, although PsiQuantum currently has stronger independent validation for the final jump to utility scale.

DARPA moved QuEra into Stage B of the Quantum Benchmarking Initiative, where the agency examines technical risks, prototypes and the full path toward a useful fault-tolerant computer. PsiQuantum is already in Stage C, so QuEra still has another important test ahead.

There is real hardware behind QuEra’s roadmap. Research involving QuEra, Harvard and MIT has demonstrated error-corrected logical operations with neutral atoms, while QuEra reported continuous operation of a coherent 3,000-qubit system in 2025. Recent peer-reviewed work has concentrated heavily on reducing fault-tolerance overhead through high-rate error correction and transversal architectures.

The current roadmap is aggressive. Libra is planned with more than 256 logical qubits running on over 10,000 physical qubits, a logical error rate around 10^-6 and roughly one million reliable logical operations. QuEra says a follow-on gigaquop system should exceed 1,000 logical qubits and one billion operations in 2028 or 2029.

Those specifications remain company targets. We give them more weight than a clean-sheet roadmap because QuEra already operates Aquila, has deployed Gemini, has published error-correction results and has survived the first stages of DARPA scrutiny. Libra now has to prove that this sequence can continue at a much larger scale.

Could SpinQ be growing faster than QuEra by actual sales?

SpinQ may have the fastest disclosed order growth among private quantum startups today, but its financial reporting is much thinner and its starting revenue base appears far smaller.

Secondary industry reporting based on Chinese company disclosures puts SpinQ’s 2024 revenue above RMB50 million, roughly $7 million. Orders reportedly grew more than 130% in 2025 and another 80% year over year in the first quarter of 2026. Superconducting products had risen to around 65% of revenue by then.

The repeated order growth is more interesting than one unusually strong quarter. SpinQ also has a commercial base that many Western quantum startups lack: its compact NMR machines have been deployed at more than 200 universities, while the company has gradually pushed into more advanced superconducting systems.

Capital is arriving quickly as well. SpinQ completed a RMB1 billion Series D in June 2026 and said it had raised RMB2 billion over the previous six months. That is aggressive funding for a company whose disclosed sales base still appears to be measured in the low tens of millions of dollars.

The catch is verification. We do not have public-company accounts, and the order numbers circulate through 36Kr and specialist quantum publications rather than audited filings. SpinQ has a serious claim to the fastest disclosed sales momentum. We need better financial disclosure before putting it above QuEra overall.

If you want more recent data on this point, please see our latest quantum computing market report.

Is Origin Quantum growing faster than the US and European startups?

Origin Quantum is growing at extraordinary speed in financing and domestic industrialization, but there is still too little commercial data to rank the Chinese company first overall.

Origin completed a pre-IPO financing of nearly RMB3 billion in June 2026. Chinese reporting put the pre-money valuation around RMB21 billion, while Dealroom now shows an enterprise value around $3.2 billion. CB Insights had placed Origin below $1 billion in 2025. Because those providers use different methodologies, we treat the apparent tripling as directional rather than a clean like-for-like calculation.

The operating story is becoming more concrete. Shortly before the financing, Origin announced Wukong-180, a superconducting machine built around a domestic 180-computing-qubit chip. Chinese coverage also credits the company with the country’s first quantum-chip production line, an earlier complete superconducting system and quantum-computing programs involving nearly 100 universities.

What we cannot see properly is equally important: recurring revenue, order growth, customer concentration and a reliable workforce series. State-backed investors also play a large role in the recent financing, which makes a direct comparison with Western venture rounds messy.

Origin Quantum could eventually prove to be one of the fastest-growing companies in the entire sector. For now, the evidence establishes a huge financing and industrialization push much more clearly than it establishes the fastest-growing commercial business.

Is Atom Computing the strongest challenger to QuEra?

Atom Computing is currently the closest US challenger to QuEra because its team is growing quickly and customers can already buy its 1,200-plus-qubit system for on-premises deployment.

The same Revelio snapshots put Atom at roughly 61% headcount growth, second only to QuEra in our comparable group. In June 2026, Atom said it had raised more than $300 million in total, including a new $100 million Series C and a planned $100 million from the US Department of Commerce.

Atom’s AC1000 carries more than 1,200 physical neutral-atom qubits and is commercially available as an on-premises system. The platform supports mid-circuit measurement, qubit reuse and real-time conditional branching, giving customers tools needed to build and test logical-qubit workloads.

Microsoft strengthens Atom’s position. The two companies have already demonstrated logical-qubit work together and are developing commercial systems combining Atom hardware with Microsoft’s software stack. DARPA has also advanced Atom into Stage B of the Quantum Benchmarking Initiative.

QuEra currently has more visible customer procurement behind its expansion. Atom has almost everything else we would want to see from a fast-growing challenger. A run of major AC1000 installations could change this ranking quickly.

If you want more recent data on this point, please see our latest quantum computing market report.

Are Alice & Bob, Quantum Motion or Photonic growing fast enough to catch QuEra?

Alice & Bob is moving fastest operationally among these three private quantum startups right now, while Photonic has raised the most capital and Quantum Motion is making the biggest bet on standard silicon manufacturing.

Alice & Bob has become much more tangible this year. The company unveiled Helium in June 2026, its first complete quantum system, after years of focusing primarily on cat-qubit hardware. France’s GENCI then agreed to acquire an 18-cat-qubit machine for installation at the TGCC supercomputing center, with user access expected in 2027. Alice & Bob is also building a $50 million product-development lab in Paris. Combined with the strong workforce growth we saw earlier, the company is moving quickly from component research into complete systems.

Quantum Motion is following a different route. It raised a $160 million Series C in May 2026 after delivering a full-stack silicon CMOS quantum computer to the UK National Quantum Computing Centre in 2025. Its bet is industrial: standard 300mm CMOS processes could eventually let it use much of the semiconductor supply chain that already exists. DARPA has advanced the company to Stage B as well. Its workforce expansion, however, is much slower than QuEra’s or Atom’s.

Photonic has the highest recent valuation of the three. A financing above $200 million closed in May at a $2 billion post-money valuation, taking total capital raised above $350 million. Photonic has since added senior commercial hires, while a Nature Communications paper published in August detailed its SHYPS quantum error-correction approach. Its comparable workforce grew only about 10% over the period we measured.

Alice & Bob therefore looks closest to turning rapid organizational growth into a broader systems business. Photonic’s funding has moved much faster than its headcount, while Quantum Motion is building toward an industrial advantage that has yet to produce similarly fast commercial expansion.

How big is a real quantum-computing business today?

Public quantum companies show that a business producing roughly $40 million to $50 million of annual revenue is already large by pure-play quantum-computing standards these days.

Infleqtion’s corrected second-quarter filing gives us one of the freshest benchmarks. Revenue reached $13.5 million, up 157% year over year, and the company raised its full-year outlook to about $45.1 million.

IQM is guiding to €42 million to €47 million of 2026 revenue. By early August, the company had sold 26 quantum systems, delivered 17 and reported more than €102 million of order backlog. That is one of the clearest pictures we have of what a scaled quantum-hardware vendor looks like commercially.

Pasqal offers another useful comparison because it only became public recently. Its transaction materials show €16.5 million of commercial revenue in 2025, seven QPUs already installed, three more in production and more than €66 million of booked and awarded business including grants.

At the smaller end, Xanadu reported about $1.5 million of second-quarter revenue and $4.3 million for the first half of 2026. Research and development spending alone approached $20 million during the quarter. The gap between scientific ambition and present financial scale remains enormous across much of quantum computing.

These public numbers help us judge the private companies. A hardware order worth tens of millions of dollars is genuinely large in this market. A billion-dollar funding round can be twenty or thirty times the annual revenue of an already commercial quantum company. So yes, money that has already turned into customers, installed machines and repeatable delivery deserves more weight.

Which quantum startup is growing the fastest right now?

QuEra Computing is the fastest-growing private quantum startup overall today.

Several rivals lead individual races. PsiQuantum is building the biggest private quantum infrastructure program and has reached the deepest stage of DARPA validation. SpinQ appears to be growing orders faster from a much smaller base. Origin Quantum has gone through a remarkable financing and industrialization surge. Atom Computing poses the strongest near-term operating challenge.

QuEra stands out because its growth is unusually broad. As seen above, its comparable workforce expanded about 82%, the fastest rate in our same-source group. During the same stretch, the company moved from cloud access into delivered on-premises hardware, expanded its route to users through AWS and kept making progress on the error-correction work behind its fault-tolerant roadmap.

The latest developments are moving in the same direction. QuEra is adding application partners, automating parts of machine operation and building toward a much larger logical-qubit system. We can see expansion in the organization, in deployed hardware, in distribution and in the technology itself.

PsiQuantum would win a ranking based on industrial scale. SpinQ could win a pure sales-growth ranking if fuller financial reporting confirms the order numbers already being reported. But for the broader question of which private quantum startup is growing fastest today, QuEra has the strongest evidence.

Rank	Private quantum startup	Where it is moving fastest	Our judgment today
1	QuEra Computing	Deployments, distribution and fault tolerance	Fastest overall
2	Atom Computing	Commercial neutral-atom hardware	Closest operating challenger
3	PsiQuantum	DARPA-validated utility-scale build-out	Biggest industrial scale-up
4	SpinQ	Chinese hardware commercialization	Possible sales-growth leader
5	Origin Quantum	Domestic industrialization and new hardware	Extremely fast, too opaque for #1
6	Alice & Bob	Complete systems and French procurement	Fast-rising European private player
7	Photonic	Funding and distributed-quantum R&D	Capital growth ahead of operations
8	Quantum Motion	Silicon-CMOS industrialization	Strong build-out, slower current expansion

If you want more recent data on this point, please see our latest quantum computing market report.

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