Sherbrooke-based quantum sensor developer SBQuantum has closed an oversubscribed $4 million USD (approximately $5.48 million CAD) seed funding round. The announcement coincides with the appointment of a new chief executive and the establishment of a dedicated United States subsidiary to target American defence and government contracts.
The seed round was led by Quantonation and Quantacet, alongside participation from Investissement Quebec. This marks the first private investment for the company, which was founded in 2017 and has historically relied on over $15 million in research and development contracts to advance its technology.
The leadership transition sees Eric Giroux stepping in as Chief Executive Officer to accelerate the company’s commercial growth. Giroux brings over a decade of experience in the security and defence sectors, including his previous role leading deep tech firm RaySecur Inc..
“The technology is mature, the market need is urgent, and the timing is right for aggressive growth,” said Giroux regarding his appointment. “The demand for resilient navigation and threat detection capabilities is accelerating rapidly, and I believe SBQuantum is uniquely positioned to become a global leader in this space.”
As part of its commercial strategy, the company has established Zero Drift Technologies, a sister corporation headquartered in Cambridge, Massachusetts. Rather than relocating its operations or consolidating, SBQuantum intends to maintain its engineering base and intellectual property in Canada while utilizing the new U.S. entity to directly serve American government customers and major defence prime contractors.

SBQuantum’s quantum diamond magnetometers are highly sensitive devices designed to act as alternatives to global navigation satellite systems or GPS navigation in contested and degraded environmentsโa growing priority for defence sectors looking for resilient alternatives.
“The timing of this investment reflects the growing urgency around resilient navigation and threat detection capabilities in both the defence and commercial sectors,” said SBQuantum Founder David Roy-Guay. “Demand for alternatives to GPS is no longer theoretical, and it is being driven by real operational requirements in the field.”
SBQuantum’s technology validation efforts have included multiple aerospace and defence initiatives. This includes hardware testing at NASA’s Goddard Space Flight Center. The company has also secured contracts with the Canadian Department of National Defence and the European Space Agency, while actively participating in the U.S. government’s MagQuest Challenge.
Moving forward, SBQuantum plans to deploy the new financing to expand its team, fast-track product development, and integrate its miniaturized sensors into unmanned vehicles.
