Cybersecurity startup Filigran raises $35M to empower global companies with proactive threat intelligence tools

Global organizations today face an escalating volume and sophistication of cyber threats that strain security teams and leave critical infrastructures vulnerable. Many lack the resources or tools to anticipate potential threats, leaving gaps in preparedness and response. Now, one cybersecurity startup has stepped in to help companies anticipate attacks and uncover threats before they happen.

Enter Filigran, a Paris, France-based startup that empowers global companies with proactive open-source cyber threat management solutions and defense tools to anticipate the next attacks. Filigran is revolutionizing end-to-end cyber threat management with proactive open-source solutions, designed to empower cybersecurity teams to anticipate the next attacks and better manage their cyber threat environment and associated risks.

Today, Filigran announced it secured $35 million in Series B funding, led by Insight Partners with continued support from Accel and Moonfire. This funding, raised just months after a $16 million Series A, will be used to further expand its reach and advance its cybersecurity threat management suite. Filigran will also use the fresh capital infusion for expansion into the U.S. and Pacific regions and accelerate innovation in AI and data-driven cybersecurity.

Founded in 2022 by Samuel Hassine (CEO) and Julien Richard (CTO), Filigran offers an eXtended Threat Management (XTM) suite to equip global organizations with a unified platform to anticipate, detect, and respond to cyber incidents, reducing incident response time and enabling long-term strategy planning.

Before founding Filigran, Samuel and Julien were friends of over a decade, united by a shared vision for cybersecurity. Together, they developed the two open-source tools, OpenCTI and OpenBAS, which would later form the foundation of Filigran. When the pair released these tools as open-source products, the Filigran community quickly took off, attracting widespread interest and engagement.

“We’ve known each other for more than 12 years,’ recalls Samuel. ‘We met while building another side project, and we just never stopped creating. So when I was thinking about creating new platforms for threat intelligence and adversary simulation, I knew we had to create this together.’

Commenting on the funding, Samuel said, “Securing this Series B investment is a testament to the tremendous progress Filigran has made in a short time. Our mission is to make threat intelligence accessible and actionable for all organizations. With this new funding, we’re poised to continue that mission on an even larger scale, driving innovation and expanding our reach across key global markets.”

In just two years, Filigran has quickly gained traction among international companies like Airbus, Marriott, and Thales, as well as public sector agencies, including the European Commission and the FBI. With its open-source platforms, OpenCTI and OpenBAS, Filigran’s solutions enable security teams to map out threat landscapes, test infrastructure resilience, and identify vulnerabilities using real-time data. This approach empowers over 6,000 organizations globally to better understand and manage their risk environments.

With over 4,300 professionals backing its open-source platforms, Filigran is offering a fresh, accessible model for tackling today’s cyber challenges.

“In a short amount of time, Filigran has managed to change the way security teams think about threat intelligence. Their open-source XTM suite, powered by OpenCTI and OpenBAS, enables users to proactively defend themselves against potential attackers,” said Crissy Costa Behrens, Principal at Insight Partners. “The company’s impressive growth and commitment to accessibility are driving the industry forward. This investment will fuel their global expansion and product innovation, and we are thrilled to be a part of their journey.”

Filigran Founders