Filigran

Open-source threat-intelligence and cyber-defense platform.

Paris-based Filigran is best known for OpenCTI, the widely adopted open-source platform for cyber threat intelligence that helps security teams structure, analyze and act on threat data.

It builds commercial products and increasingly AI capabilities on top of that open-source foundation. Its tooling has become part of the cyber-defense stack for many organizations and governments.

It is a leading European example of open-source security software with a sustainable commercial model.