S
Singletto
Antimicrobial technology for pathogen-killing protective equipment
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 dataAt 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
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES A✓Equity / VC | Oct 2025 | $10M | $40M | Undisclosed | ↗ |
| CONVERTIBLEEquity / VC | Oct 2020 | $1M | — | Undisclosed | — |
Growth signals
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.
Similar companies
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Other known investors3 additional known investors
University of Washington- SFSeaChange Fund
SeaChange Fund
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
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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