Stemrad
Stemrad develops the AstroRad radiation shielding vest, a high-density polymer wearable that selectively protects astronauts' vital organs from space radiation. The company serves space agencies including NASA and the ISS National Laboratory, with the product validated through ISS and Artemis I mission testing for deep space missions.
- Company typePrivate
- Founded2011
- HeadquartersTel Aviv, Israel
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Stemrad does
Stemrad is a radiation protection technology company founded in 2011 and headquartered in Tel Aviv, Israel, operating with 11–50 employees as a private for-profit entity. The company develops personal protective equipment designed to mitigate the effects of acute radiation exposure, with its flagship product being the AstroRad radiation shielding vest. The vest employs proprietary high-density polymers to selectively shield vital organs from solar radiation, addressing cancer and radiation sickness risks for astronauts on deep space missions to the Moon, Mars, and beyond.
The AstroRad technology was co-developed with Lockheed Martin and has progressed through an extensive validation pathway that includes testing aboard the International Space Station (evaluated by NASA astronaut Kayla Barron in 2024) and the Artemis I mission in 2025. These milestones are positioning the product for crewed deep space flight qualification. The company partners with the ISS National Laboratory for in-orbit testing and appears to distribute through government aerospace procurement channels, with NASA and the ISS National Laboratory as its primary documented customers.
Stemrad's business model is B2G/B2B with a vertical segmentation approach focused on space agencies and astronauts. The company has raised at least $6 million in disclosed funding (a December 2017 round led by Techstars Ventures), and pricing and contract terms are not publicly disclosed. The company is led by co-founder Daniel Levitt (Founding CEO and current Board Member). The product portfolio is single-product in the documented record, with future roadmap expansion implied by the Artemis program alignment.
Stemrad firmographics
Firmographics- Name
- Stemrad
- Legal name
- Stemrad
- Website
- https://stemrad.com
- Company type
- Private
- Founded year
- 2011
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Stemrad develops the AstroRad radiation shielding vest, a high-density polymer wearable that selectively protects astronauts' vital organs from space radiation. The company serves space agencies including NASA and the ISS National Laboratory, with the product validated through ISS and Artemis I mission testing for deep space missions.
- Ownership category
- akta.pro rank
Stemrad industry classification
Industry- Product category
- Radiation Protection Equipment
- NAICS
- Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing (336419)
- SIC
- Guided Missiles & Space Vehicles & Parts (3760)
- akta.pro primary industry
- Aerospace Thermal Management, Insulation & Fire Protection Materials (IMABANAE)
- akta.pro secondary industry
- Radomes & Composite/Aero Protective Structures (IMABAEAG)
Keywords
Where Stemrad is headquartered
LocationHeadquarters
- HQ city
- Tel Aviv
- HQ country
- Israel
- HQ region
- Middle East
Markets served
Stemrad business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Personnel, Operations
Stemrad product offering
Product offeringCore offering
StemRad develops and manufactures the AstroRad radiation shielding vest, a wearable personal protective equipment that uses high-density polymers to selectively shield vital organs from solar and cosmic radiation. The product was co-developed with Lockheed Martin and is designed to protect astronauts on deep-space missions to the Moon, Mars, and beyond, mitigating cancer and acute radiation sickness risks.
Product overview
Stemrad offers a single unified product: the AstroRad radiation shielding vest. This wearable technology was developed in partnership with Lockheed Martin and has undergone extensive testing through the ISS National Laboratory, with NASA astronauts evaluating the device aboard the International Space Station. The vest employs high-density polymers to selectively protect vital organs from space radiation, with insights from ISS testing enabling refinements to its ergonomics and functionality. Additional validation testing was conducted during the Artemis I mission, advancing human space exploration capabilities.
Differentiator
Problem solved
Functional benefit
Brands
- AstroRad: A wearable radiation protection vest developed by StemRad and Lockheed Martin for astronauts, employing high-density polymers to selectively shield vital organs from solar radiation during deep-space missions.
Products and services
- AstroRad
Quantifiable outcome
- Successfully tested by NASA astronaut Kayla Barron on the International Space Station
- +1 more outcomes
Companies that use Stemrad
Customer profileNamed customers2 records
Segments1 record
Ideal customer profiles1 record
Stemrad technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Stemrad partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- Lockheed MartincoreLockheed Martin co-developed the AstroRad radiation shielding vest with StemRad. The partnership leverages Lockheed Martin's aerospace expertise and StemRad's radiation protection technology to create wearable radiation protection for astronauts on deep space missions. The vest has undergone extensive testing through the ISS National Laboratory with NASA evaluation.
- ISS National LaboratorycoreThe ISS National Laboratory facilitated testing of the AstroRad radiation shielding vest developed by Lockheed Martin and StemRad onboard the International Space Station. The study validated the vest's performance in space, providing data to refine its design for future deep space missions beyond low Earth orbit.
Recent moves5 records
Expansion highlights4 records
Stemrad competitors and assessment
Company assessmentDirect peers
- Lockheed Martin: Lockheed Martin is StemRad's co-developer on the AstroRad vest and the prime contractor behind Orion and major Artemis elements; comparable as both a development partner and a potential in-house provider of radiation protection for crewed spaceflight.
- ILC Dover: ILC Dover manufactures space suits and soft-goods inflatable structures for NASA and commercial space customers; highly comparable as a wearable, soft-material, human-rated aerospace safety product supplier in the same ecosystem.
Broad incumbents
- Collins Aerospace: Collins Aerospace supplies life-support, environmental, and crew systems for spacecraft including ISS and Orion; comparable as a broad aerospace incumbent with overlapping capabilities in crew protective equipment.
- Mirion Technologies: Mirion is a leading provider of radiation detection, measurement, and personal protective equipment across nuclear, medical, and defense markets; comparable as a broad incumbent in wearable radiation protection with adjacent technology overlap to StemRad's polymer shielding.
- Honeywell: Honeywell supplies a wide range of aerospace crew systems, environmental controls, and protective equipment; comparable as a large incumbent with the capability to bundle radiation protection into broader crew-system offerings.
- Northrop Grumman: Northrop Grumman manufactures the HALO module for Gateway and provides ISS/NASA life-support subsystems; comparable as an aerospace prime with capabilities in crewed deep-space hardware that could internalize radiation protection.
- Boeing: Boeing is a key NASA contractor (Starliner, SLS Core Stage) and a broad aerospace incumbent with crew-systems expertise; comparable as a potential integrator or competitor in crew protective solutions.
- SpaceX: SpaceX operates Crew Dragon and is positioning for deep-space crewed missions, with internal capability to specify or develop crew protective hardware; comparable as the dominant commercial human-spaceflight player shaping demand for wearable radiation protection.
Emerging players
- Axiom Space: Axiom Space develops commercial space stations and Extravehicular Mobility Unit (spacesuit) for NASA; comparable as an emerging player investing in human-rated wearable systems for low-Earth-orbit and future deep-space missions.
- Final Frontier Design: Final Frontier Design develops next-generation spacesuits and pressure garments for commercial spaceflight and government programs; comparable as a niche, emerging wearable-protection peer targeting the same astronaut customers.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks5 records
Key highlights5 records
Customer concentration
Stemrad social profiles
Digital presenceStemrad financial estimates
Financial estimateRevenue estimate
Valuation estimate
Stemrad leadership team
Management profileNumber of profiles
Profiles1 record
Stemrad funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Stemrad M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Stemrad
What does Stemrad do?
StemRad develops and manufactures the AstroRad radiation shielding vest, a wearable personal protective equipment that uses high-density polymers to selectively shield vital organs from solar and cosmic radiation. The product was co-developed with Lockheed Martin and is designed to protect astronauts on deep-space missions to the Moon, Mars, and beyond, mitigating cancer and acute radiation sickness risks.
When was Stemrad founded?
Stemrad was founded in 2011. It employs 11 to 50 people.
Where is Stemrad based?
Stemrad is headquartered in Tel Aviv, Israel, in the Middle East region.
Who are Stemrad's main competitors?
Direct peers on record are Lockheed Martin and ILC Dover. Broad incumbents are Collins Aerospace, Mirion Technologies, Honeywell, Northrop Grumman, Boeing and SpaceX. Emerging players are Axiom Space and Final Frontier Design.
Does Stemrad have an API?
No public API is recorded for Stemrad.
What industry is Stemrad in?
Stemrad's product category is Radiation Protection Equipment. Its primary akta.pro industry code is IMABANAE, Aerospace Thermal Management, Insulation & Fire Protection Materials, with a secondary code of IMABAEAG, Radomes & Composite/Aero Protective Structures. Its NAICS code is 336419 and its SIC code is 3760.