Filigran

Cybersecurity · Paris, FR · filigran.io

Open-source threat intelligence and cyber threat management solutions.

Founders

Samuel Hassine (France · ♂) — After nearly five years in cyber threat intelligence at France's ANSSI, he built the open-source tool OpenCTI and in 2022 co-founded Filigran to commercialize an eXtended Threat Management platform.
Julien Richard (France · ♂) — A long-time friend of Samuel Hassine who joined as co-founder and CTO of Filigran, co-developing the OpenCTI and OpenBAS open-source threat tools.

Shares the most investors with (number = shared investors):

Date	Round	Amount
Oct 2025	Series C Filigran closed a $58 million Series C led by Eurazeo with Deutsche Telekom, Accel and Insight Partners.	$58M
Nov 2024	Series B Paris-based cybersecurity firm Filigran raised a USD 35M Series B led by Insight Partners, with Accel, to expand in the US and develop AI features.	$35M
Mar 2024	Series A Filigran raised a EUR15M Series A led by Accel to open US and Australia offices and expand its open-source threat management portfolio.	$16.2M
Jun 2023	Seed French cybertech Filigran raised a EUR5M first round led by Moonfire for its open-source threat-management suite.	$5.4M

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Data is community-curated and may be incomplete.