# Samuel Hassine

> Samuel Hassine is the Paris-based CEO and co-founder of Filigran and co-creator of OpenCTI with Julien Richard. A former head of cyber threat intelligence at ANSSI and security strategy director at Tanium, he built an open-source software business around organising threat knowledge and connecting it with defensive testing and risk decisions.

- **Role:** CEO and co-founder at Filigran
- **Organizations:** Filigran, ANSSI, Tanium, Luatix
- **Education:** Master of Science, Sorbonne Université, MSc in International Relations, Sciences Po Aix, Political science studies, Sciences Po Aix
- **Known for:** Co-created OpenCTI, an open-source platform for organising cyber threat intelligence., Co-founded Filigran to provide sustained development and professional services around open-source security tools., Led Filigran through financing that exceeded $100 million in total by October 2025.

## Career timeline

- **2015-2020** — Worked at ANSSI, including in security operations and as head of cyber threat intelligence.
- **2018** — Began OpenCTI while at ANSSI, developing it with Julien Richard.
- **2020-2022** — Director of Security Strategy and Operations, EMEA, at Tanium.
- **2022** — Co-founded Filigran with Julien Richard; Hassine became CEO and Richard CTO.
- **2023** — Filigran announced a €5 million seed round led by Moonfire Ventures.
- **2024** — Filigran announced a €15 million Series A led by Accel and a $35 million Series B led by Insight Partners.
- **2025** — Filigran announced a $58 million Series C led by Eurazeo.
- **2026** — Opened the THREAD conference in Paris alongside Julien Richard.

## Achievements

- Co-created OpenCTI, an open-source platform for organising cyber threat intelligence.
- Co-founded Filigran to provide sustained development and professional services around open-source security tools.
- Led Filigran through financing that exceeded $100 million in total by October 2025.
- Developed an ecosystem whose OpenCTI contributors include the FBI Cyber Division.

## Latest updates

- **2026-10** — Hassine and Julien Richard opened Filigran’s THREAD event in Paris on October 15; the event included the announcement of OpenCRQ.
- **2026-03** — Appeared in an RSAC 2026 interview discussing threat intelligence, security validation and Continuous Threat Exposure Management.
- **2025-10** — Filigran announced a $58 million Series C, bringing total company fundraising above $100 million.

## Links

- Website: https://filigran.io/authors/samuel-hassine
- LinkedIn: https://www.linkedin.com/in/samuelhassine/
- Twitter/X: https://twitter.com/SamuelHassine
- GitHub: https://github.com/SamuelHassine

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Profile page: https://yespress.io/samuel-hassine
Published by YesPress — https://yespress.io
Last updated: 2026-10-26