Phosphorus

Phosphorus

Provides subscription-based IoT security for devices

About Phosphorus

Simplify's Rating
Why Phosphorus is rated
B
Rated B on Competitive Edge
Rated B on Growth Potential
Rated B on Differentiation

Industries

Enterprise Software

Cybersecurity

Company Size

51-200

Company Stage

Series A

Total Funding

$70M

Headquarters

Nashville, Tennessee

Founded

2017

Overview

Phosphorus.io provides subscription-based cybersecurity services that protect IoT devices for large enterprises. Its platform guards against common IoT weaknesses such as unpatched firmware, default credentials, and backdoors, and includes a one-button synchronization that enables rapid onboarding of thousands of devices. Enterprises subscribe to ongoing monitoring, threat intelligence, and automatic updates to keep devices secured across sectors like retail, media, manufacturing, healthcare, and data centers. The goal is to reduce IoT breach risk by delivering scalable, continuously maintained security for extensive device fleets.

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Simplify's Take

What believers are saying

  • $27M Series A2 from Evolution Equity Partners fuels R&D and global expansion.
  • Neva Sgr investment accelerates automation and Italy market entry.
  • Doubled devices under management last year with enhanced Genus-Species technology.

What critics are saying

  • Armis captures 40% more devices, eroding healthcare and manufacturing share.
  • Claroty outsells 3:1 via Siemens partnerships, blocking $10B industrial clients.
  • Microsoft Defender bundles free scanning, commoditizing discovery for retailer clients.

What makes Phosphorus unique

  • Patented xIoT Intelligent Active Discovery scans 16 times faster than passive scanners.
  • Automates remediation of default credentials, outdated firmware, and risky configurations.
  • Secures over 1 million unique device models across IoT, OT, IIoT, and IoMT.

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Funding

Total Funding

$70M

Above

Industry Average

Funded Over

2 Rounds

Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Above Average

Industry standards

$15M
$8.2M
Discord
$15M
Canva
$27M
Phosphorus
$30M
Kalshi

Benefits

Remote Work Options

Growth & Insights and Company News

Headcount

6 month growth

-5%

1 year growth

-9%

2 year growth

-3%
Phosphorus
Sep 4th, 2025
Phosphorus Names Brett Raphael as Chief Revenue Officer

NASHVILLE, TN - September 4, 2025 - Phosphorus, the leading provider of proactive security and management for the extended Internet of Things (xIoT), today announced the promotion of Brett Raphael to the position of Chief Revenue Officer (CRO).

WVNEWS
Aug 25th, 2025
Phosphorus Appoints Sonu Shankar as President and COO to Accelerate Autonomous xIoT Operations Vision

Phosphorus appoints Sonu Shankar as President and COO to accelerate Autonomous xIoT operations vision.

MarketScreener
Apr 28th, 2025
Neva Sgr Invests in Phosphorus Cybersecurity

Neva Sgr, the venture capital arm of Intesa Sanpaolo, has invested in Phosphorus Cybersecurity to boost its growth in xIoT security. This investment will help Phosphorus enhance intelligent automation and expand operations to Italy. Phosphorus aims to secure and manage the growing xIoT landscape, with over 60 billion devices worldwide. The company plans to evolve from intelligent automation to full autonomy in device management.

Surperformance
Apr 28th, 2025
Intesa Sanpaolo Says Neva Sgr Invests In Phosphorus Cybersecurity

Intesa Sanpaolo SpA: * NEVA SGR FINALIZES INVESTMENT IN PHOSPHORUS CYBERSECURITY * PHOSPHORUS CYBERSECURITY IS A U.S. SECURITY AND DEVICE MANAGEMENT COMPANY FOR EXTENDED...

PR Newswire
Nov 11th, 2024
Phosphorus Recognized As A Crn® 2024 Stellar Startup!

NASHVILLE, Tenn., Nov. 11, 2024 /PRNewswire/ -- Phosphorus Cybersecurity Inc., the leading provider of unified, prevention-based security management for the xTended Internet of Things (xIoT), announced today that CRN®, a brand of The Channel Company, has included Phosphorus on its 2024 Stellar Startups list in the Internet of Things (IoT) category. This prestigious list highlights fast-rising technology vendors that are driving innovation and fostering growth in the IT channel with groundbreaking products. Companies recognized as Stellar Startups must be six years old or younger, and they are selected across categories that include artificial intelligence/machine learning (AI/ML), big data, business applications, cloud, data center, Internet of Things (IoT), networking/unified communications, security, and storage. Phosphorus provides the industry's only proactive Cyber-Physical System (CPS) Protection Platform to secure and manage the expanding IoT, OT, and IoMT attack surface, and automate the mitigation and remediation of the biggest CPS vulnerabilities. Its Unified xIoT Security Management Platform is the only proactive xIoT discovery and remediation solution, delivering safe, fast, and accurate discovery and assessment of all IoT, OT, and IoMT devices, while enabling automated hardening and remediation at scale – all without agents, hardware, or hassles

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