Phosphorus Cybersecurity builds a patented Unified xIoT Security Management Platform that discovers, secures, and manages Cyber‑Physical Systems (IoT, OT, IIoT, IoMT) without agents using an Intelligent Active Discovery engine. The platform claims 100% device certainty on first discovery, discovers and assesses assets up to 16x faster than passive scanners and up to 95% more efficiently than legacy active scanners, and is safe to use across sensitive OT and ICS devices. Phosphorus reports more than one billion enterprise IPs assessed to date, assists customers in assessing over 50 million new IPs each week, maintains a Global Device Network of 600+ manufacturers, and supports well over one million unique xIoT models. The company highlights widespread device insecurity—an average of 75% of devices running with default passwords, 70% containing known high‑ to critical‑state vulnerabilities, and 30% being end‑of‑life—and says customers are improving hygiene (updating firmware 24x more and rotating passwords 110x more). The new capital will be used to expand R&D and go‑to‑market initiatives to meet growing enterprise demand. Phosphorus has received industry recognition, including inclusion as a Representative Vendor in the 2023 Gartner Market Guide for CPS Protection Platforms. Phosphorus Cybersecurity offers Phosphorous Enterprise, a flagship solution that provides a full inventory of IoT devices across an environment (IP address, manufacturer, model, firmware) to increase transparency into device security posture. The company emphasizes moving beyond discovery to automated remediation, enabling customers to patch vulnerable devices, manage passwords, and monitor for signs of compromise. It says its platform can identify at least 90% of overlooked IoT devices and bring them into an automated remediation workflow. Phosphorus positions itself against tools like Shodan and ecosystem solutions such as Microsoft Defender for IoT and Amazon IoT Device Defender by claiming it “actually fixes vulnerabilities with a click.” The business plans to use new funding to enhance its Security of Things product set, hire additional engineering talent, and improve the user experience. The company’s raise comes amid rapidly rising IoT adoption and attacks, with connected devices and incident figures cited in the announcement.

Total raised

$65M

Funding rounds

2

Latest round

Series A

Latest activity

Dec 2023