WISeKey International Holding Ltd's subsidiary, WISeSat.Space, has participated in the latest financing round of FOSSA Systems, S.L., a Spain-based aerospace and defence company. The investment, announced on June 25, 2026, reinforces WISeSat's objective to build a European-rooted secure satellite infrastructure platform. This strategic move builds on a relationship established in 2021, focusing on the development of small-satellite platforms for secure IoT communications from Low Earth Orbit (LEO).

The partnership has enabled WISeSat to build an early satellite access base across 25 launched LEO satellites, with access to 8 satellites currently in operation. These missions have supported WISeSat's pilot testing, technical validation, and flight-heritage programme. The latest investment reaffirms confidence in FOSSA's small-satellite capabilities and strengthens the industrial relationship between the two entities.

WISeSat operates within WISeKey's ecosystem, which integrates cybersecurity, digital identity, semiconductors, and post-quantum technology. SEALSQ Corp., another WISeKey subsidiary, focuses on semiconductors and post-quantum technology products. While WISeSat's investment in FOSSA is a strategic move by WISeSat, it aligns with the broader objective of developing secure, trusted, and quantum-resilient infrastructure across semiconductor, cybersecurity, and space layers.

SEALSQ's planned Quantum Spatial Orbital Cloud (QSOC) is expected to utilize WISeSat satellite capacity and infrastructure for future orbital layer services. These services may include quantum key distribution (QKD), quantum random number generation (QRNG), and post-quantum identity. However, any such use remains subject to definitive agreements, technical validation, financing, regulatory approvals, launch cadence, and customer demand.

Carlos Moreira, Founder and CEO of WISeKey, highlighted the importance of the investment in de-risking execution and accelerating the roadmap. He emphasized the growing market opportunity for sovereign, resilient, and secure space-based communications in Europe. Julián Fernández, CEO of FOSSA Systems, welcomed the continued support and expressed anticipation for further cooperation in small-satellite infrastructure and secure communications.

Key Details of the Partnership

Strategic Context and Future Outlook

The investment comes amid Europe's increased emphasis on resilient, sovereign, and secure space capabilities. WISeSat's roadmap focuses on providing satellite capacity, orbital infrastructure, and ground-segment capabilities for secure communications and IoT connectivity. The integration with WISeKey's Root of Trust and SEALSQ's post-quantum semiconductor capabilities aims to position the company to capture long-term value in secure communications and future quantum-resilient applications.

WISeKey International Holding Ltd announced that its subsidiary SEALCOIN has secured $4 million in strategic investment to accelerate the integration of its blockchain ecosystem into the emerging space economy. The funding includes a $1 million commitment from The Hashgraph Group and a $3 million commitment from WISeKey, aimed at advancing the development of the SEALCOIN platform. This investment is intended to support the continued expansion of the ecosystem, which is powered by the QAIT utility token issued by the QAIT Association for machine-to-machine and space-related transactions.

Strategic Investment and Objectives

The capital injection is designed to strengthen the integration between the WISeSat satellite constellation, secure SEALSQ semiconductor technology, decentralized identity infrastructure, and the transaction layer. SEALCOIN aims to combine satellite communications, blockchain technology, digital identity, cybersecurity, and Internet of Things (IoT) infrastructure to create a trusted framework for autonomous machine interactions. The platform seeks to establish an economic layer for the space-based machine economy, enabling secure exchanges of data, services, and value.

Ecosystem Use Cases

The SEALCOIN ecosystem is designed to support a variety of emerging applications in the space and digital sectors. Key use cases include:

• Satellite-to-device transactions
• Autonomous machine payments
• Space-based IoT connectivity
• Digital asset settlement across satellite networks
• Trusted location and telemetry services
• Decentralized infrastructure applications (DePIN)
• Autonomous logistics and mobility systems

SPACEDROP Campaign Success

SEALCOIN also highlighted the success of its recent SPACEDROP campaign, which saw over 45,000 participants interact directly with the WISeSat satellite constellation. The campaign engaged users with all 19 operational satellites, helping to validate real-world satellite-to-blockchain communications and infrastructure performance. This initiative served as a large-scale public demonstration of blockchain-enabled space infrastructure, contributing to the testing and strengthening of critical ecosystem components.

Strategic Support and Future Outlook

The investment and community support position SEALCOIN to further its mission of enabling trusted digital identities and secure autonomous transactions. With backing from WISeKey and The Hashgraph Group, the company is accelerating the deployment of its vision for the machine economy. The Hashgraph Group emphasized the potential of the autonomous space economy as a significant market opportunity, leveraging QAIT to settle secure machine-to-machine transactions in space and between space and Earth.