French startup KERYS Software has secured €6.2 million in pre-seed funding to accelerate its mission of transforming how enterprises manage IT infrastructure.
KERYS Software was founded in 2024 by Thomas Brethomé, Sébastien Domergue, Sylvain Cassier, and joined in early 2025 by Thomas Girard. These four long-standing industry experts bring deep expertise in cybersecurity and infrastructure, honed in high-stakes sectors such as defence.
The startup sprang from a simple, yet worrying observation: most businesses are weighed down by underused IT equipment, a recipe for runaway costs and high energy bills. By virtualising workloads, KERYS allows several work environments to share a single workstation or server without sacrificing performance or security.
Delivered through the YS::Cloud and YS::Desktop platforms, this shared infrastructure model cuts costs and emissions by reducing the number of physical devices and using servers more efficiently.
Thomas Girard, CEO and co-founder of KERYS Software, shared:
In just one year, we have managed to establish ourselves as one of the emerging key players in InfraTech. We are tackling several key priorities for companies across all sectors, with an all-in-one approach: reducing costs, strengthening cybersecurity and managing carbon footprints.
This represents a paradigm shift in IT infrastructure optimisation and associated resource management, and the strong demand we are seeing – particularly from large corporations – strengthens our ambition.
Since its launch, KERYS Software has formed several strategic and commercial partnerships to expand the use of its technology. With this new funding, the company aims to grow its team, improve its product, and speed up international expansion.
Investment funds Daphni, Seedcamp, and Backtrace took part in the round. They were joined by Kima Ventures and business angels Amirhossein Malekzadeh, Sébastien Pahl, and Nicolas Steegmann, who are backing KERYS Software as it scales its go-to-market efforts and attracts top talent to support its growth.
Shabir Vasram, Partner, Daphni, commented:
KERYS Software is a rare combination of an extraordinary team and perfect timing, with the reorganisation of component architecture, the implementation of new regulations (NIS2 in particular), and established players losing momentum.
Carlos Eduardo Espinal MBE, Managing Partner at Seedcamp, said they are excited to back KERYS from day one in their mission to redefine virtualisation across critical industries and beyond, adding:
With a stellar team of industry experts and a solid value proposition, KERYS is well-positioned to become a leader in InfraTech.
Dominik Tobschall, Founder and Partner at Backtrace, believes that Workstations and servers spend much of their lifetime idling. He said:
With Kerys, customers can run multiple CPU or GPU workloads on a single machine. Its lightweight, highly secure microkernel delivers near-native performance and safely virtualises workloads that previously required dedicated hardware. That’s smart engineering solving a real pain for customers: less idle time, lower total cost of ownership, and a smaller carbon footprint.
KERYS Software is already recognised in France as an emerging force in the deep tech and cybersecurity ecosystem and is supported by several financial institutions and public bodies.
KERYS Software is also a partner of the CEA LIST for the formalisation of security certifications for its new technology, which will enable very high levels of security to be achieved by the company in the near future, such as the EAL5+ common criteria level.
Lead image: Kerys Software team | Photo: Uncredited
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