Why Investors Are Betting on Quobly’s €115M Series A
A €115M Series A for silicon quantum computing, where the exciting part is not just quantum ambition, but a named semiconductor manufacturing path through STMicroelectronics, Soitec, FD-SOI, and cloud/HPC deployment.
Context
Today, Quobly announced a €115M Series A, roughly $134M, led by Bpifrance, SEALSQ, and STMicroelectronics, with participation from the European Innovation Council Fund, Blast, ALIAD / Air Liquide Venture Capital, and Innovacom. The company is building silicon-based quantum computers using silicon spin qubits, FD-SOI processes, and semiconductor manufacturing infrastructure, with a first commercial system planned for cloud access in 2026 and HPC deployment in 2027.
The investor bet is that quantum computing will not scale as a fragile lab-hardware market. It will scale more like a semiconductor systems market: wafers, fabs, substrates, packaging, cryogenics, control electronics, trusted infrastructure, and patient industrial capital. That is why the Quobly round is interesting. The company is not only saying “we have promising physics.” It is saying “we can manufacture this through a real semiconductor chain,” with STMicroelectronics, Soitec, 28 nm FD-SOI, silicon-28 substrates, and a 300 mm fab in Crolles all becoming part of the story.
The tension is still obvious. Quobly has strong manufacturing and ecosystem proof points, including 2.4M+ qubits fabricated at STMicroelectronics, 65 patents filed, 90+ experts, and four global locations. But the strongest signals are not yet revenue signals. The round says investors believe Quobly can become a semiconductor-scale quantum company. It does not yet prove that customers will pay meaningfully for Quobly systems at scale.
Quobly's $134M Series A: What's Really Happening
You’ve seen 5% of the analysis on this page. The other 95% is in this investor memo.
It is designed to answer the questions you have:
- why they raised now
- what investors saw that you didn’t
- whether this is noise or the start of something much bigger
Q1Why did investors bet on Quobly this time?
Investors bet on Quobly’s Series A because Quobly made silicon quantum computing look investable as an industrial semiconductor problem, not as another fragile quantum lab experiment. The company raised €115M, roughly $134M, at the exact moment when its story shifted from “promising physics” to “credible manufacturing chain, commercial product roadmap, and strategic infrastructure relevance.”
The round is best read as a semiconductor industrialization round. Quobly’s thesis is that fault-tolerant quantum computing will not scale through bespoke lab hardware. It will scale through silicon spin qubits manufactured on existing semiconductor infrastructure, then packaged into cloud-accessible and HPC-deployable systems.
That is why the STMicroelectronics and Soitec signals matter so much. Quobly had already formed a 2024 collaboration with STMicroelectronics around 28 nm FD-SOI technology. In December 2025, Soitec’s isotopically enriched silicon-28 FD-SOI wafers were cycling inside ST’s 300 mm fab in Crolles. By June 2026, Quobly was preparing its first commercial system for cloud access in 2026 and HPC deployment in 2027.
That sequence is exactly what deeptech investors want to see before writing a large check. The manufacturing chain became nameable: STMicroelectronics, Soitec, FD-SOI wafers, silicon-28 substrates, 300 mm fab, Crolles. A quantum startup claiming it can scale is easy to ignore. A quantum startup building around a real semiconductor manufacturing stack is harder to dismiss.
Quobly also had enough operating proof points to make the story feel less speculative. The company reports 2.4M+ qubits fabricated at STMicroelectronics, 65 patents filed, 90+ experts, and four global locations. Those numbers do not prove commercial quantum advantage. They do prove that Quobly is already behaving like an industrial hardware company, not a small academic spinout hoping the market waits.
The funding progression is clean. In 2023, Quobly raised €19M to develop its silicon spin-qubit architecture. In 2025, it secured a €21M Q100T package to support production of a 100-physical-qubit silicon quantum chip. In 2026, it raised €115M to industrialize, scale the product line, and bring the first systems into customer cloud and HPC environments.
That matters because the round size matches the roadmap shift. A €20M-style round can fund architecture and chip development. A €115M Series A funds a very different ambition: more engineering capacity, more process integration, more international expansion, more systems work, and a faster push toward commercial deployment.
The cap table also tells the same story. Bpifrance brings sovereign deeptech capital. STMicroelectronics brings manufacturing credibility. SEALSQ brings secure hardware and post-quantum security relevance. The EIC Fund brings European strategic deeptech capital. ALIAD / Air Liquide Venture Capital brings industrial gases, materials, cryogenics, and process relevance. Innovacom brings continuity as an existing deeptech investor.
This is not a Silicon Valley momentum syndicate. It is a European industrial-power syndicate. That is exactly what Quobly needs if the hardest problems are manufacturing, packaging, cryogenics, trusted infrastructure, and public-sector legitimacy.
The main caution is customer proof. The strongest Quobly signals are manufacturing and ecosystem signals, not revenue signals. The round says investors believe Quobly can become a semiconductor-scale quantum company. It does not yet prove that customers will pay meaningfully for Quobly systems at scale.
That is the right tension. Quobly’s Series A is not a commercial victory lap. It is a high-conviction bet that the winning quantum hardware companies will look more like semiconductor systems companies than science projects. On that specific thesis, Quobly now has one of the most credible European cases.
If you want to understand why these investors decided to bet on this, get our full memo.
Methodology note We read the round as an industrialization financing because the company announcement ties proceeds to R&D, industrialization, international expansion, product-line scaling, and deployment of Alloy systems into cloud and HPC environments. The €115M, €21M, and €19M figures refer to disclosed announcement amounts, not independently verified legal close amounts. See full methodology below.
Q2Who are the investors behind Quobly’s Series A?
The investors behind Quobly’s Series A form a deliberately strategic syndicate: seven disclosed investors, three co-leads, and a heavy tilt toward public capital, semiconductor infrastructure, security hardware, and industrial deeptech. The disclosed Series A investors are Bpifrance, SEALSQ, STMicroelectronics, the European Innovation Council Fund, Blast, ALIAD / Air Liquide Venture Capital, and Innovacom.
The round was co-led by Bpifrance, SEALSQ, and STMicroelectronics. That lead group is the clearest signal in the entire round. Bpifrance makes the financing a French sovereign deeptech bet. STMicroelectronics makes it a semiconductor manufacturing bet. SEALSQ makes it a secure quantum systems and post-quantum security bet.
This is a much stronger lead structure than a single financial VC would have been. Quobly’s problem is not just raising money. It needs to manufacture silicon quantum processors, secure the systems, work inside industrial supply chains, and earn credibility with cloud, HPC, and sovereign customers. The co-leads map directly to those needs.
Three of the seven disclosed investors can be considered tier-1 for this specific deal: Bpifrance, STMicroelectronics, and the EIC Fund. That is 43% of the disclosed syndicate. Bpifrance is tier-1 because it is a core French deeptech and sovereignty investor. STMicroelectronics is tier-1 because Quobly’s manufacturing thesis depends on semiconductor credibility. The EIC Fund is tier-1 because it is a major European deeptech scale-up investor with recent exposure to quantum hardware.
Five of the seven disclosed investors can be considered category specialists or category-relevant specialists under a broad industrial silicon quantum definition: Bpifrance, STMicroelectronics, SEALSQ, the EIC Fund, and Innovacom. That is 71% of the syndicate. The strict quantum-specialist count is lower, but the broader count is more useful because Quobly is not only a quantum company. It is also a semiconductor manufacturing, secure infrastructure, cryogenic systems, and European industrial-policy company.
Two disclosed investors are clear follow-on investors: Bpifrance and Innovacom. That is 29% of the disclosed syndicate. Bpifrance backed Quobly earlier and was part of the France 2030-linked funding path. Innovacom was already an investor and came back into the Series A.
The five likely first-time equity investors are STMicroelectronics, SEALSQ, the EIC Fund, ALIAD / Air Liquide Venture Capital, and Blast. That is 71% of the disclosed syndicate. This is a healthy mix: enough insiders to show continuity, enough new strategic investors to show the company’s story stepped up.
The biggest step-up is STMicroelectronics. A silicon quantum startup backed by a semiconductor manufacturer looks very different from a silicon quantum startup backed only by financial investors. ST does not just bring money. It makes Quobly’s “we can manufacture this” claim more credible.
SEALSQ is also unusually interesting because it had previously explored a potential minority investment and possible majority acquisition of Quobly. That path later shifted toward Series A participation. For Quobly, that is probably a better outcome. It keeps a serious strategic partner close without selling the company too early.
The notable existing shareholders include CEA, CNRS, Quantonation, and Supernova Invest. They should not be counted as Series A investors unless another source confirms participation, but their presence still matters. CEA and CNRS reinforce the research-origin story. Quantonation reinforces the quantum-specialist credibility. Supernova reinforces the French deeptech context.
The investor list is high-signal, but not because it is packed with famous global venture brands. It is high-signal because the syndicate fits the company’s actual bottlenecks. Quobly needs manufacturing access, industrial process knowledge, cryogenic and materials relevance, sovereign legitimacy, and patient capital. This cap table gives it those ingredients.
Methodology note Investor counts use the seven disclosed Series A participants only. Existing shareholders such as CEA, CNRS, Quantonation, and Supernova Invest are treated as context, not Series A participants, unless separately disclosed as joining this round. See full methodology below.
Q3Are the investors of Quobly’s Series A familiar with the industry?
The investors in Quobly’s Series A are highly familiar with the relevant industry, as long as the industry is defined properly: industrial silicon quantum computing systems, not generic quantum hype. At least five of the seven disclosed investors have strong category relevance, and three have direct operating or infrastructure relevance to Quobly’s roadmap.
Bpifrance is a natural fit because Quobly sits directly inside France’s sovereign deeptech logic. Quantum computing, semiconductor infrastructure, and strategic European compute capacity are exactly the kind of long-cycle technologies Bpifrance is built to support. Its repeat involvement also matters. It did not discover Quobly at the Series A. It had already backed the company’s earlier path.
STMicroelectronics is the most obvious natural fit. Quobly’s entire promise rests on the idea that silicon qubits can scale through semiconductor-grade manufacturing. ST brings direct credibility around FD-SOI processes, 300 mm fab environments, and industrial discipline. For this category, ST is not just a familiar investor. It is one of the most useful investors Quobly could have.
SEALSQ is familiar with an adjacent but important part of the industry: secure semiconductors, post-quantum cryptography, Root-of-Trust hardware, and trusted systems. That matters because quantum computers will eventually need to live inside secure cloud, defense, financial, and critical infrastructure environments. SEALSQ gives Quobly a security narrative that most quantum hardware companies do not have as explicitly.
The EIC Fund is the clearest investor with recent cross-category quantum exposure. It backed Equal1 in January 2026, eleQtron in May 2026, and QuiX Quantum in July 2025. Equal1 is the most important overlap because it is a direct silicon quantum competitor. It raised €51M, roughly $60M, to scale silicon-based quantum computers and deploy its Bell-1 data-center-ready quantum server.
That means one of Quobly’s disclosed investors has already backed a direct competitor. The investor is the EIC Fund. The competitor is Equal1. The timing is recent: January 2026, about 4.6 months before Quobly’s Series A. The read is not negative. It shows the EIC Fund is deliberately building exposure to multiple European quantum hardware paths, including silicon quantum.
The EIC Fund also backed similar companies in other quantum modalities. eleQtron is trapped-ion, but the thesis is similar at the industrial scaling and cloud-access level. QuiX Quantum is photonic, but the commercialization timing is similar because it is working toward a first-generation universal quantum computer. This makes the EIC Fund less like a single-company picker and more like a European portfolio allocator across quantum hardware.
ALIAD / Air Liquide Venture Capital is a natural industrial fit. Air Liquide’s relevance is not quantum theory. It is industrial gases, cryogenics, electronics, materials, and process environments. Those are real constraints in quantum hardware. A company trying to industrialize silicon quantum processors benefits from investors that understand advanced industrial systems.
Innovacom is a category-relevant continuity investor. It is not the sharpest quantum-specialist name in the syndicate, but it is a deeptech and industrial technology investor with prior Quobly exposure. That gives it useful context and reduces the feeling that the round was built entirely from new strategic capital.
Blast is the least legible investor in the group. It appears to be more financial than the rest of the syndicate, or at least less clearly tied to the silicon quantum manufacturing thesis. That does not hurt the round. It simply makes Blast less important to the strategic interpretation.
Overall, this is a very familiar investor base. The syndicate understands quantum, semiconductors, public deeptech financing, secure hardware, and industrial infrastructure. That matters because Quobly’s next stage will not be won by storytelling. It will be won by executing across a brutal stack: wafers, qubits, packaging, cryogenics, control electronics, software, cloud access, HPC integration, and customer trust.
One whole section is dedicated to this point in our full memo.
Methodology note Category relevance is assessed against industrial silicon quantum computing systems, not broad quantum computing. The direct competitor overlap noted here uses Equal1 because it shares the closest silicon-based, data-center-deployable positioning among the comparable companies identified. See full methodology below.
Q4How strategic are the investors behind Quobly’s Series A?
The investors behind Quobly’s Series A are extremely strategic: 6 of the 7 disclosed investors, or 86%, are strategic or strategically relevant rather than purely financial. That is unusually high for a Series A, and it fits the category. Industrial silicon quantum computing needs ecosystem power, not just capital.
STMicroelectronics is the most strategically valuable investor in the round. Quobly’s differentiated claim is that silicon spin qubits can scale through existing semiconductor manufacturing infrastructure. ST gives that claim weight. It connects the round to FD-SOI processes, 300 mm fabs, semiconductor-grade rigor, and commercial manufacturing credibility.
Bpifrance is strategic in a different way. It gives Quobly sovereign legitimacy and continuity with France 2030-style deeptech funding. For a company building strategic compute infrastructure in Europe, that matters. It can help with credibility, public-sector alignment, and follow-on ecosystem support.
SEALSQ brings security and optionality. It has relevance in post-quantum cryptography, secure hardware, Root-of-Trust systems, and potentially defense or critical infrastructure use cases. Its earlier exploration of a majority acquisition makes it the clearest future acquirer signal in the round.
ALIAD / Air Liquide Venture Capital brings industrial infrastructure relevance. Air Liquide is more likely to be a partner than an acquirer, but its exposure to gases, cryogenics, electronics, and materials makes it useful for a company trying to industrialize hardware that depends on difficult physical environments.
The EIC Fund is strategic public capital. It gives Quobly EU-level visibility and reinforces the idea that Europe wants multiple credible quantum hardware champions. Its participation also helps crowd in legitimacy around a category where private capital alone may not move fast enough.
Innovacom is strategic-ish rather than deeply strategic. Its value is continuity, deeptech experience, and institutional memory from earlier Quobly rounds. It does not change the manufacturing or customer-access story the way ST or SEALSQ does, but it helps stabilize the cap table.
Blast is the only investor that looks more financial or less clearly strategic. In this syndicate, that is fine. A round does not need every investor to be a strategic operator. What matters is that the lead group and most of the syndicate are aligned with the actual operating risks.
Three disclosed investors can supply or support critical infrastructure: STMicroelectronics, ALIAD / Air Liquide Venture Capital, and SEALSQ. That is 43% of the syndicate. ST can support semiconductor manufacturing credibility. Air Liquide can support industrial process and cryogenic ecosystem relevance. SEALSQ can support security-layer credibility.
Two investors could materially improve exit optionality: SEALSQ and STMicroelectronics. SEALSQ is the most explicit because it had already explored a potential majority acquisition. STMicroelectronics is more speculative as an acquirer, but very plausible as a deeper strategic partner because Quobly’s manufacturing story already runs through semiconductor infrastructure.
The strategic quality of the round is unusually high. A generic VC syndicate would have been less convincing here. Quobly is not selling a lightweight software tool. It is trying to build a quantum computing platform that depends on fabs, materials, cryogenics, secure systems, and sovereign infrastructure. The investor base looks designed for that exact problem.
The tradeoff is that this kind of cap table can be slow and coordination-heavy. Quobly may gain legitimacy, access, and patient capital, but it may also have to navigate a dense European industrial ecosystem. That is the price of playing an infrastructure game.
It’s actually something we elaborate on in our full memo.
Methodology note “Strategic or strategically relevant” includes investors whose disclosed business, public-capital mandate, or industrial role maps to Quobly’s operating risks: manufacturing, security, cryogenics, industrial process, public-sector legitimacy, or prior company continuity. Percentages use the seven named Series A investors as the denominator. See full methodology below.
Quobly's $134M Series A: What's Really Happening
You’ve seen 5% of the analysis on this page. The other 95% is in this investor memo.
It is designed to answer the questions you have:
- why they raised now
- what investors saw that you didn’t
- whether this is noise or the start of something much bigger
Read more
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Methodology, Sources & Disclosure
TimingAll timing comparisons in this note are measured as of June 3, 2026. Funding-round time windows refer to announcement dates, not legal close dates, unless a close date is separately disclosed. Quobly’s Series A announcement says the company announced the closing on June 3, 2026, but we did not identify a separate legal close date.
Investment thesisThe retained investment thesis behind Quobly’s Series A is that fault-tolerant quantum computing will scale through silicon spin qubits manufactured on existing semiconductor infrastructure, especially 300 mm FD-SOI processes, then packaged into cloud-accessible and HPC/data-center-deployable systems. This thesis was retained because the round was framed around industrialization, silicon quantum processor scale-up, first Alloy system deployment, and international commercial expansion.
Category definitionThe category used for market-activity analysis is industrial silicon quantum computing systems. It includes companies developing quantum computers or core QPUs based on silicon spin qubits, CMOS-compatible quantum devices, FD-SOI or CMOS manufacturing, cryogenic CMOS control, or data-center/HPC-deployable silicon quantum systems. It excludes pure quantum software, quantum algorithms, quantum sensing, quantum networking, post-quantum cryptography, photonic-only systems, trapped-ion systems, neutral-atom systems, superconducting-only systems, and general cloud access platforms that aggregate third-party quantum computers.
Competitor setThe direct competitor set used for funding comparisons includes Diraq, Quantum Motion, Equal1, SemiQon, and Silicon Quantum Computing. Equal1 is the closest recent comparable because it also frames silicon-based quantum computing as data-center-ready and semiconductor-manufacturing-led. IonQ, Quantinuum, IQM, Rigetti, Oxford Quantum Circuits, PsiQuantum, and Pasqal are excluded from the strict direct competitor set because they compete in quantum computing broadly but use materially different qubit modalities or system architectures. Competitor funding rankings include only private or venture-backed companies with comparable disclosed financing data.
Investor classificationInvestor classifications are based on disclosed public participation and qualitative judgment. “Tier-1” includes elite venture, growth, crossover, public deep-tech, or strategic industrial investors relevant to this financing context. “Category specialist” means repeated or thesis-relevant exposure to quantum hardware, semiconductors, secure infrastructure, public deeptech financing, industrial infrastructure, or Quobly specifically. “Follow-on” means the investor publicly appeared in a prior Quobly round or funding path.
Investor-count denominatorInvestor counts use the disclosed investor base only. Relevant percentages refer to named investors, not the full undisclosed syndicate, because the Series A announcement names 7 investors. For example, 3 of 7 disclosed investors being tier-1, 5 of 7 disclosed investors being category specialists or category-relevant specialists, 2 of 7 disclosed investors being follow-on investors, and 6 of 7 disclosed investors being strategic or strategically relevant all refer only to the named investor base.
SourcesWe selected these sources because they come either from direct company announcements, which are the primary source for funding, product, partnership, roadmap, governance, and operating milestones, or from tier-1 / authoritative publications, which provide independent validation, sector context, and comparable market signals: Quobly Series A announcement, Quobly homepage and company metrics, Quobly company and roadmap page, Quobly careers page, Quobly open jobs page, Quobly and STMicroelectronics partnership, Quobly, Soitec, and ST 300 mm fab milestone, Quobly leadership and governance appointments, Quobly and SEALSQ collaboration, Quobly news archive, Data Center Dynamics coverage of Quobly’s Series A, Tech.eu coverage of Quobly’s Series A, Silicon Republic coverage of Quobly’s Series A, TMCNet / PRNewswire mirror of Quobly’s Series A, SEALSQ investor release on Series A participation, Data Center Dynamics coverage of Quobly’s Q100T financing, EE Times Europe coverage of Quobly’s 2023 seed, Quantonation coverage of Quobly’s 2023 seed, Quantum Insider coverage of governance appointments, Soitec coverage of the 28Si FD-SOI milestone, EU-Startups coverage of Equal1’s €51M round, Diraq company positioning, SEALSQ MOU announcement regarding Quobly.
DisclosureWe are not affiliated with Quobly, its investors, or the named comparable companies. No payment, consideration, or commitment of future business has been received from Quobly, its investors, or any named comparable company in connection with this note. Nothing herein constitutes investment advice or an offer to transact in any security.
Quobly's $134M Series A: What's Really Happening
You’ve seen 5% of the analysis on this page. The other 95% is in this investor memo.
It is designed to answer the questions you have:
- why they raised now
- what investors saw that you didn’t
- whether this is noise or the start of something much bigger