Paris-based startup Filigran is rapidly becoming the next cybersecurity rocket ship to watch: The company has now raised a $35 million Series B, just a few months after raising $16 million in a Series A round.

The main product of Filigran is the open source threat intelligence platform OpenCTI, with which companies or public sector organizations can import threat data from multiple sources and enrich that data set with intel from providers such as CrowdStrike, SentinelOne or Sekoia.

The open source version, OpenCTI, has garnered the interest of 4,300 cybersecurity professionals, having been downloaded millions of times. OpenCTI is also used by the European Commission, the FBI, and New York City Cyber Command. Beyond this, the company sells an enterprise edition that is usable as a software-as-a-service product or, if desired, can be hosted on premises, as do Airbus, Marriott, Thales, Hermès, Rivian, and Bouygues Telecom.

Filigran has ridden on that success to further introduce other products and is now building a full suite of cybersecurity products under its brand name, eXtended Threat Management, or XTM, for short.

Another product by Filigran is the OpenBAS, or breach and attack simulation platform. You can use OpenCTI and OpenBAS independently but, allegedly, when put together, you get an even better view of where the risks lie.

Filigran is capitalizing on the truth that it is always much easier to launch a second product when your first product is popular. The company is already working on its third product.

"By 2026, our vision is to provide an integrated set of three complementary products that give end-to-end solutions in threat management directly targeting complex cybersecurity challenges modern organizations are facing," co-founder and CEO Samuel Hassine said in an interview with TechCrunch.

Interestingly, Filigran draws inspiration from GitHub-the major hub for open-source software development-and Hugging Face, which is reported to be a major hub for artificial intelligence development. " Filigran wants to release XTM Hub --"a collaborative platform designed to empower the cybersecurity community "--by the end of this year, Hassine said.

The hub will be a central forum where users can access resources, share tradecraft and connect with others in the Filigran ecosystem," he added.

Led by Insight Partners, existing investors Accel and Moonfire have re-invested in the Series B round. In addition to its product offerings, the funding will also be used to scale Filigran into other regions as well, and with its presence in France, the U.S., and Australia, it is expanding into Germany, Japan, and Singapore.