France’s Filigran Raises €49 Million To Expand Cybersecurity Solutions For FBI And European Commission

The round was led by Eurazeo Growth, with backing from Deutsche Telekom’s T.Capital and existing investors Accel and Insight Partners.

“This Series C round is an important milestone in Filigran’s journey. We are extremely proud of the collective commitment that brought us here, with one clear mission: enabling organisations everywhere to be more proactive against threats and to leverage intelligence at every level of their security strategy,” said Samuel Hassine, CEO of Filigran. “It reflects everyone’s commitment to achieving our mission, which is to make threat intelligence accessible and actionable for all organisations worldwide.”

Filigran’s Series C ranks among the largest European cybersecurity fundraises of 2025. In the sector, only Blackwall’s €45 million Series B comes close, while most cyber startups, including Dedge Security and WiseBee, raised modest early-stage sums.

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Investor confidence extends beyond companies, with vehicles like TIN Capital’s €15 million top-up and Expeditions Fund II’s €100 million close reflecting broader faith in Europe’s cyber ecosystem.

Filigran’s open-source-led strategy anchored in OpenCTI, OpenBAS, and the upcoming OpenGRC module signals a more advanced growth stage in a space largely driven by early-stage, proprietary-tool startups.

“We’re thrilled to back Filigran as it enables leading organizations worldwide to take a proactive approach to cyber defense. With AI accelerating both the scale and sophistication of cyberattacks, companies need solutions that can turn vast amounts of threat intelligence into actionable insights to prevent future incidents.

“Filigran’s best-in-class platform delivers exactly that. We’re also excited about the powerful AI capabilities on the horizon, which will further solidify Filigran’s position as the category-defining platform for threat intelligence,” said Raluca Ragab, Partner and Alexandra Pederzani, Director at Eurazeo Growth.

Founded in 2022 by Samuel Hassine and Julien Richard, Filigran aims to transform proactive cyber threat detection through its XTM suite. This suite includes OpenCTI, which structures and operationalises global threat intelligence, and OpenBAS, an adversary emulation and security validation tool that uses real-time threat data to uncover security gaps.

Filigran differentiates itself in the CyberTech space with its focus on advancing threat intelligence and its practical application for cybersecurity teams. Its mission is to deliver innovative open-source solutions that help organisations anticipate and address complex cyber risks.

The company reports that over 6,000 public and private organisations use its solutions, including Rivian and Bouygues Telecom, alongside public sector entities such as the European Commission, the FBI, multiple US and Australian federal agencies, and various European institutions.

“The progress Sam, Julien, and the Filigran team have made since we led their Series A last year has been remarkable,” said Andrei Brasoveanu, Partner at Accel. “Today, more than 6,000 public and private sector organisations around the world rely on Filigran’s OpenCTI platform to proactively defend against cyber threats. Coupled with a passionate and fast-growing open-source community, Filigran is clearly redefining and democratising access to threat management.”

The new funding will fuel Filigran’s growth and expansion into regions such as the Pacific and the Middle East, with future plans for Japan and Saudi Arabia.

The company also aims to deepen its presence in the US and European markets, recruiting talent from France and Germany to support growth and enhance collaboration with its open-source community, which has doubled in size over the past two years.

Additionally, the round will advance the development of OpenGRC, a third module for the XTM suite, helping organisations prioritise cyber risks and take targeted action. Filigran will also accelerate AI integration through its XTM One AI Agent platform and strengthen R&D teams for OpenCTI and OpenBAS to continue evolving these core solutions.

“Filigran’s expansion across Europe, combined with Deutsche Telekom’s customer base, creates a unique opportunity: delivering advanced cyber defense to organisations of all sizes. Together, we are setting a new benchmark for actionable threat intelligence and resilience,” said Thomas Tschersich CSO at Deutsche Telekom AG.

EU-Startups has tracked Filigran’s progress closely over the past two years. The company was first highlighted in early 2024 after raising a €15 million Series A to expand its open-source threat intelligence platform. Later that year it was named among the “10 European startups driving cybersecurity innovation” reflecting its growing influence in Europe’s cyber ecosystem.

In mid-2025 EU-Startups featured Filigran again in its “Guardians of the Grid” list of cybersecurity startups to watch underscoring the company’s sustained prominence and visibility across Europe’s digital security landscape.