SEALSQ's Bold Quantum Bet: Building a Global Network from Chip to Orbit

Geneva, Switzerland – June 02, 2026 – In a move that signals a dramatic escalation in the race for quantum supremacy, cybersecurity and semiconductor firm SEALSQ has acquired Swiss photonics pioneer Miraex. While tech acquisitions are routine, this one is different. It represents what SEALSQ claims is the final, critical piece in an audacious strategy years in the making: the creation of a fully integrated, end-to-end quantum technology pipeline. Dubbed the “Quantum Sovereign Vertical Stack,” the architecture aims to control every layer of the emerging quantum world, from the post-quantum silicon in our devices to new constellations of satellites in low earth orbit.

The acquisition, funded by a dedicated $200 million internal war chest, brings Miraex's specialized quantum interconnect technology into a sprawling portfolio that already includes chip designers, quantum computing hardware, and a satellite company. SEALSQ is not just building a product; it is assembling an empire, betting that the future of secure communications will be fought and won by those who control the entire value chain, from the root of the chip to the vacuum of space.

The Photonic 'Missing Link'

At the heart of the acquisition is Miraex, a deep-tech spinoff from the prestigious EPFL Innovation Park. The company's breakthrough is not in building a quantum computer itself, but in solving one of the technology’s most stubborn problems: communication. Most leading quantum processors, based on superconducting or semiconductor spin technology, 'think' in the microwave frequency. However, to send that quantum information over any meaningful distance, it must be converted into light and sent down fiber optic cables or beamed to a satellite. This conversion is the bottleneck that has largely confined quantum systems to isolated labs.

Miraex builds the translator. Its proprietary technology, based on Thin Film Lithium Tantalate (TFLT) Photonic Integrated Circuits (PICs), acts as the essential bridge between the microwave world of quantum processing and the optical world of quantum communication. SEALSQ describes it as the “connective tissue” and the “missing link” in its stack. This technology is foundational for enabling Distributed Quantum Computing (DQC), where multiple quantum processors can be linked together to create a machine more powerful than the sum of its parts.

Crucially for SEALSQ's grander ambitions, Miraex’s photonic chips are designed for the harsh environment of space. They are compact, power-efficient, and inherently radiation-tolerant—all prerequisites for being packed into the nanosatellites and CubeSats that will form the backbone of the company's planned Quantum Orbital Space Cloud (QOSC).

Assembling the Sovereign Stack

The Miraex deal is the capstone of a multi-year M&A spree executed through SEALQUANTUM.com, the firm’s strategic investment arm. With over $65 million of its $200 million fund now deployed, SEALSQ has systematically acquired the components needed to achieve its vision of vertical integration:

• The Silicon Root: Full acquisition of IC'ALPS, a leading French ASIC design house, provides the custom semiconductor expertise to embed post-quantum cryptography directly into hardware.
• The Quantum Processor: Strategic investments in EeroQ, a U.S. quantum computing pioneer, anchors the hardware component of the stack with a 'Made in USA' strategy.
• The Orbital Infrastructure: An investment in WISeSat.Space provides the LEO satellite constellation, which is already operational after launching with SpaceX, ready to host the new quantum payloads.
• Sovereign Footholds: Joint ventures like Quantix Edge Security in Spain, backed by the Spanish government, bolster EU semiconductor sovereignty and provide regional design and personalization centers.

This deliberate strategy is enabled by a remarkably strong balance sheet. Financial data shows SEALSQ holds more cash than debt, giving it the flexibility for such aggressive, long-term bets. Yet, for all its surging revenue growth—up 66% year-over-year—the company is not yet profitable. This highlights the high-stakes nature of its gamble: SEALSQ is pouring resources into market leadership in a sector that is still nascent, betting that a dominant, integrated position will yield immense returns when the quantum era fully arrives.

The New Space Race: Quantum Security in Orbit

The most ambitious piece of SEALSQ's strategy is its Quantum Orbital Space Cloud (QOSC). By integrating Miraex's technology into the WISeSat satellite constellation, the company plans to offer space-based Quantum Key Distribution (QKD) on a global scale. QKD leverages the principles of quantum mechanics to create cryptographic keys that are, in theory, immune to any form of computational attack, including from a future quantum computer.

This places SEALSQ squarely in the middle of a new geopolitical space race. China has already demonstrated the viability of satellite-based QKD with its Micius satellite, which successfully facilitated an intercontinental video call secured with quantum keys. The European Union and the United States are also pouring billions into their own national quantum initiatives. SEALSQ's “sovereign stack” is a powerful pitch to Western governments and corporations concerned about supply chain security and reliance on foreign technology for their most critical communications infrastructure, from defense and finance to energy grids.

“We have spent years assembling the assets required to deliver a truly sovereign, end-to-end quantum architecture,” noted Carlos Moreira, Chairman & CEO of SEALSQ. “The quantum internet is no longer a theoretical construct, for SEALSQ, it is a buildable, deployable roadmap that we can now begin to execute.”

From Hype to Highway: The Long Road to a Quantum Internet

While the vision is compelling, it is important to separate the buildable roadmap from the finished destination. The broader consensus among physicists is that a true, universal Quantum Internet—capable of connecting quantum computers worldwide—is still decades away. Significant scientific hurdles, such as developing effective quantum repeaters to overcome signal loss and extending the fragile coherence of quantum states, remain.

What SEALSQ has assembled is not the quantum internet itself, but arguably one of the first and most complete on-ramps to that future highway. The integration of post-quantum chips, quantum processors, photonic interconnects, and a satellite network under a single strategic umbrella is an unparalleled achievement in vertical integration for this industry.

“Joining SEALSQ is the natural next step for Miraex,” added Daniel Brau, CEO & Co-Founder of Miraex. “SEALSQ brings the global semiconductor reach, the satellite infrastructure, and the post-quantum cryptography expertise to take that vision to planetary scale... The era of distributed, space-secured quantum computing begins today.”

For now, the near-term applications will likely focus on providing highly secure QKD links for specific government and enterprise clients. The full realization of a global, distributed quantum network remains on the horizon, but with the acquisition of Miraex, SEALSQ has firmly positioned itself as one of the primary architects of that future.