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Singletto

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Antimicrobial technology for pathogen-killing protective equipment

Seattle, United StatesFounded 2020Health Tech & Medtech
Valuation $50–100M Last recorded · 2025
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Singletto and the history behind them.

About Singletto

Singletto is a biotechnology firm that develops antimicrobial technologies for the healthcare, military, industrial, and consumer sectors. The company was founded in 2020 by Dr. James (Jim) Chen, a neurosurgeon with extensive research experience in Photodynamic Therapy (PDT), Dr. Thomas (Tom) Lendvay, a pediatric surgeon, and John Bjornson, who serves as CEO. The company's inception was driven by the COVID-19 pandemic, stemming from Dr. Chen's hypothesis that PDT methods could decontaminate personal protective equipment (PPE).

The company's core technology is Oxafence™, which leverages Antimicrobial Photodynamic Inactivation (aPDI) to actively destroy pathogens. This technology uses light-activated, medically-understood dyes like Methylene Blue to generate singlet oxygen, which inactivates viruses and bacteria on treated surfaces. Singletto's first commercial product in the U.S. is the ProGear+Oxafence ASTM Level 3 surgical mask, which is the only FDA-cleared mask with claims of inactivating viruses. Tests showed that 99.9% of specific viral strains were inactivated within five minutes of contact with a treated mask. The technology is designed as a safer and more effective alternative to silver nanoparticles, which can have negative environmental impacts.

Singletto's business model involves both direct-to-consumer sales, such as making its masks available on Amazon, and a B2B and government approach. The company collaborates with and licenses its Oxafence technology to manufacturers to incorporate into their products. For its surgical masks, Singletto partnered with Prestige Ameritech for manufacturing. The firm also works with government agencies like the U.S. Defense Advanced Research Projects Agency (DARPA) to develop applications for military uniforms and wound care. The company has raised $10 million in a Series A funding round and has received backing from the U.S. Department of Defense.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2020
Headquarters
Seattle, United States
Employees
8
Open positions
None listed
Dealroom signal
64.2/100
Industry
Health
Sub-industry
Medical Devices
Sector
Health Tech & Medtech, Infections and Infectious Diseases, Respiratory, Defence Applications, Spinout, NIF defense security and resilience, biomanufacturing, NIF Crisis preparedness, DT and LS, science-based
Technology
Deep Tech
Business model
Manufacturing
Client focus
b2b

Funding history

3 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SERIES A✓Equity / VC Oct 2025 $10M $40M Undisclosed ↗
CONVERTIBLEEquity / VC Oct 2020 $1M — Undisclosed —
Showing the latest 2 of 3 recorded eventsBook a demo for the full funding history →

Growth signals

Singletto website traffic

Latest recorded traffic for Singletto is 1.3K monthly website visits, down 35% over the last three months. Singletto's team declined 27.3% over the past year.

Latest monthly visits1.3K 3-month web change-35% 1-year team growth-27.3%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investments and acquisitions

Capital deployed

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

Investors

3 investors on the cap table

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

Other known investors3 additional known investors

  • University of Washington
  • SeaChange Fund
  • SeaChange Fund
Team profiled 4 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 3 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
1 countries with
team presence
🇺🇸 United States100%
1 country shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Singletto 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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