Yaniv Bar-Dayan, Tal Morgenstern, and Roy Hodir founded Vulcan Cyber in Tel Aviv in 2018 to pioneer cyber risk management. Their ExposureOS platform helped businesses reduce vulnerabilities and asset risk through measurable, efficient attack surface security, integrating with over 100 security products to consolidate, prioritise, and remediate exposures across the entire technology estate.

In January 2025, Tenable (NASDAQ: TENB) acquired Vulcan Cyber for approximately $150 million, accelerating its exposure management capabilities. Dawn participated in the company's funding rounds.