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Phosphorus

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Eliminates the IoT security gap with the only remediation platform that finds every Thing, fixes every Thing and brings every Thing into compliance

Nashville, United StatesFounded 2017Cybersecurity
Valuation $100–250M Last recorded · 2023
Revenue $1–10M Latest reported FY
Headcount <100 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Phosphorus and the history behind them.

About Phosphorus

Phosphorus.io is a cybersecurity startup focused on securing Internet of Things (IoT) devices. The company addresses the vulnerabilities inherent in IoT devices, which are often exploited by hackers due to unpatched firmware, default credentials, and backdoors. Phosphorus.io serves a diverse range of clients, including large retailers, media companies, manufacturing plants, healthcare facilities, and data centers. These clients are particularly vulnerable due to the sheer number of IoT devices they use, which can create significant security challenges.

The market Phosphorus.io operates in is the rapidly growing IoT security sector. With the global worth of IoT technology projected to reach $6.2 trillion by 2025, the need for robust security solutions is more critical than ever. The company’s primary product is designed to provide a reliable and easy-to-use solution for Chief Security Officers (CSOs) to combat IoT breaches. This includes features like one-button IoT device synchronization, which simplifies the process of securing a large number of devices.

Phosphorus.io’s business model revolves around providing subscription-based security services to its clients. They make money by offering these services on a recurring basis, ensuring continuous protection and updates against new threats. The company is currently deploying its solutions with a $60 billion global retailer and a $40 billion media company, highlighting its capability to handle large-scale operations.

In summary, Phosphorus.io is a key player in the IoT security market, offering essential services to industries that rely heavily on IoT devices. Their solutions help mitigate the risks associated with IoT vulnerabilities, ensuring the safety and integrity of business operations.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2017
Headquarters
Nashville, United States
Employees
70
Open positions
None listed
Dealroom signal
80.2/100
Industry
Security
Sub-industry
Device security & Antivirus
Sector
Cybersecurity, Woman Founder
Technology
IoT InternetOfThings
Business model
SaaS
Client focus
b2b

Funding history

5 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITIONOther financing Jun 2026 $0 — Dragos ↗
EARLY VCOther financing Apr 2025 $0 — NEVA SGR ↗
Showing the latest 2 of 5 recorded eventsBook a demo for the full funding history →

Financials

Revenue over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearRevenueGrowth
2026
2025
2024
2023
2022
2021 —
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Growth signals

Phosphorus website traffic

Latest recorded traffic for Phosphorus is 11K monthly website visits, down 15.4% over the last three months. Phosphorus's team grew 16.7% over the past year.

Latest monthly visits11K 3-month web change-15.4% 1-year team growth+16.7%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Similar companies

Closest operating peers by Dealroom taxonomy

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Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

5 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A4 investors entered at this stage

  • MassMutual Ventures
  • SYN Ventures
  • Evolution Equity Partners
  • NEVA SGR

Other known investors1 additional known investor

  • Dragos
Team profiled 19 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 5 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
4 countries with
team presence
🇺🇸 United States82.5%
🇦🇺 Australia7.5%
🇨🇦 Canada5%
🇸🇦 Saudi Arabia5%
4 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Phosphorus on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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