Warmilu

What Warmilu does

Warmilu is a US-based medical device startup that develops non-electric warming technology centered on its patented InstaWarmer phase-change heat pack. Founded in 2012 (originally as M-Wrap) by five University of Michigan engineering students led by CEO Grace Hsia, the company manufactures the heat pack and pairs it with application-specific enclosures—primarily the IncuBlanket for neonatal and infant warming, alongside Outdoors WarmCush, GameDay WarmCush, and Pain Management solutions. The core technology uses phase-change materials as a thermal battery: heat is stored by boiling or autoclaving, and the pack releases regulated warmth for 4–6 hours (5–8 hours with an insulator product) when activated by clicking a metal disk. A US Utility Patent covers the temperature-limiting mechanism that prevents overheating.

The company's go-to-market combines direct e-commerce sales through warmilu.com with a channel-partner model spanning medical device distributors (Maternova, VIA Global Health, Relief for Africa Foundation, Zona Pakistan, Medical Specialties, World Medical Relief) and humanitarian organizations (MSF, Rotary Club, NEST360, Kybele). A 2020 partnership with VIA Global Health expanded addressable reach to 60+ countries across Africa, Asia, and Latin America. Warmilu's primary customer base is hospitals, NICUs, and clinics in resource-scarce settings, supplemented by humanitarian NGOs, government health ministries, and consumer or outdoor buyers. Hardware sales of reusable packs (rated for up to 100 uses, ~600 total warmth hours) constitute the main revenue stream; pricing is quote-based and not publicly disclosed. The company received US FDA Class 1 clearance for the InstaWarmer in 2018, Kenya Pharmacy and Poisons Board clearance, and Certificates of Exportability, and operates from a 2,041 sq. ft. Ann Arbor manufacturing facility with 1–10 employees. FY2017 revenue was disclosed at $47,506, and cumulative external funding totals approximately $297,000 across seed rounds, grants, and accelerator prizes.

Name

Warmilu

Legal name

Warmilu LLC

Website

https://warmilu.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

1–10 employees

Short description

Warmilu is a US medical device startup that makes the InstaWarmer, a patented non-electric phase-change heat pack used with the IncuBlanket for neonatal warming in hospitals and clinics, particularly in resource-scarce settings across Africa, Asia, and Latin America.

Ownership category

akta.pro rank

Product category

Medical Warming Devices

NAICS

Electromedical and Electrotherapeutic Apparatus Manufacturing (334510)

SIC

Electromedical & Electrotherapeutic Apparatus (3845)

akta.pro industry

PRIMARYHLAHACAK

Continuous Temperature & Fever Monitoring (Wearable Thermometry)

Healthcare & Life Sciences/Medical Devices & Diagnostics/Patient Monitoring, Wearables & Remote Diagnostics

Keywords

• Infant warming solutions
• Phase change warming
• Neonatal care equipment
• Non-electric warming devices
• Medical warming technology

Headquarters

HQ city

Ann Arbor

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Warming Products Sales: Direct sales of InstaWarmer heat packs and IncuBlanket infant warming blankets. Products sold to healthcare providers, hospitals, and consumers. Both one-time hardware purchases with reusable packs.

Pricing tiers

Go-to-market motion2 records

Distribution channels8 records

Marketing channels7 records

Core offering

Warmilu manufactures and sells non-electric, reusable phase-change warming packs (InstaWarmer) and fabric enclosures built around that pack, including the IncuBlanket infant warming blanket for neonatal care, the Outdoors WarmCush and GameDay WarmCush for outdoor and stadium use, and Pain Management heat therapy wraps. The InstaWarmer is activated by clicking a metal disk, reaching roughly 102°F within 60 seconds and delivering 4-8 hours of safe, temperature-regulated warmth, with each pack rechargeable by boiling or autoclaving and reusable up to 100 times. Products are made in Ann Arbor, Michigan from US materials and are FDA-cleared for infant and adult warming.

Product overview

Warmilu is a non-electric warming technology company that manufactures medical-grade warming solutions centered on its patented InstaWarmer phase-change heat pack technology. The InstaWarmer is a reusable thermal battery that stores heat from boiling/autoclaving and releases it on demand via a metal disk activator, providing 4-6 hours of safe, regulated warmth. The product portfolio centers on the InstaWarmer paired with various fabric enclosures: the IncuBlanket system for infant warming (available in preterm, newborn, newborn plus, and transport sizes), the Outdoors WarmCush for outdoor recreation, GameDay WarmCush for stadium seating, and Pain Management Solutions for chronic joint pain. All products share the core phase-change material technology while offering sector-specific applications from NICU to wilderness. The company operates as a single unified product line with multiple form factors, all manufactured in Ann Arbor, MI from US materials.

Differentiator

Problem solved

Functional benefit

Products and services

• InstaWarmer A US-patented, non-electric, instant warming pack that uses phase-change materials as a thermal battery. Activated by clicking a metal disk, it generates safe, regulated warmth reaching roughly 102°F within 60 seconds, lasts 4-6 hours alone (5-8 hours with an insulator product), and can be reused up to 100 times by boiling or autoclaving. Sold to healthcare providers, NGOs, and consumers.
• IncuBlanket An infant warming incubator blanket that uses the InstaWarmer heat pack to provide non-electric, temperature-regulated, long-lasting warmth for premature and at-risk newborns. Designed as an alternative or supplement to traditional incubators, transport incubators, and kangaroo mother care. Available in preterm, newborn, newborn plus, and wipeable transport sizes. Sold to hospitals, NICUs, and humanitarian organizations.
• Outdoors WarmCush

Quantifiable outcome

• Increased infant survival rate by 40-60% in resource-scarce settings
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

13 partnerships are on record, tiered core, major and minor.

• VIA Global HealthcoreChannel Partner/ Reseller/ Distributor · 12 August 2020Global distribution partnership bringing life-saving warmth to babies born in over 60 countries throughout Africa, Asia, and Latin America. VIA's sales and distribution network, recognized and funded by Bill and Melinda Gates Foundation, enables Warmilu to access underserved communities. Partnership expected to enable warming of hundreds of thousands of babies worldwide.
• Relief for Africa FoundationcoreStrategic or Co-development PartnerNon-profit focusing on providing medical relief to impoverished communities in Horn of Africa. Partnership enabled Warmilu to break into 30+ hospitals in 15 countries. RFA helped set up hospital visits and catalyzed Warmilu's introductions to dignitaries, governors, first ladies, and healthcare officials in Kenya and Uganda.
• MaternovacoreChannel Partner/ Reseller/ DistributorWomen's health solutions company revolutionizing access to trusted innovations. Sells Warmilu IncuBlanket and InstaWarmer through their online retail store. Features low-cost rugged solutions for infant and maternal health.
• Rotary ClubcoreStrategic or Co-development PartnerPartnership with Rotary Club of Innsbrook and Rotary Club of Sunyani Central Ghana for infant warming projects. Kicked off 3 new clinical warming sites in DRC, Niger, and Zimbabwe. Submitted $70K grant application for improving healthcare at hospitals, clinics, and CHPS across Ghana.
• Doctors Without Borders (MSF)coreStrategic or Co-development PartnerWorking with MSF to warm babies in new clinical site in Democratic Republic of Congo. Partnership enables deployment of infant warming solutions in conflict zones and humanitarian crisis settings.
• NEST360majorStrategic or Co-development PartnerIncluded in NEST360 2nd Edition Newborn Technology Landscape Catalog of interventions for newborn care in low-resource settings. NEST360 partnership includes LSHTM, Rice University's Rice 360°, Northwestern Kellogg, and Malawi College of Medicine. Initially focused on Malawi, Kenya, Nigeria, and Tanzania.
• Hillman AcceleratormajorGTM or Marketing PartnerAccelerator for women and minority-led startups. Helped Warmilu generate $47,506 revenue in FY 2017 contributing to external investments of $222,000. Connected Warmilu with Procter & Gamble for entrepreneurial and technical mentorship. Candice Matthews Brackeen provided mentorship and helped gain access to funding.
• Procter & GambleminorGTM or Marketing PartnerConnected through Hillman Accelerator for entrepreneurial and technical mentorship. Mentorship relationship supporting business development.
• KybelecoreStrategic or Co-development PartnerClinical partner for distribution and implementation. Works with Warmilu to deploy infant warming solutions in clinical settings.
• Zona Pakistan (Private) LtdcoreChannel Partner/ Reseller/ DistributorMedical device distributor in Pakistan. Managing the Zona Pakistan Project with on-site manager Ibrahim Shamsi. Successfully deployed warming solutions at National Institute of Child Health.
• Medical Specialties Inc.minorChannel Partner/ Reseller/ DistributorMedical device distributor partner for Warmilu products.
• World Medical ReliefminorChannel Partner/ Reseller/ DistributorMedical device distributor partner for Warmilu products.
• Fleece and Thank YouminorStrategic or Co-development PartnerPartner organization supporting Warmilu's mission. Logo appears in Warming Babies section on website.

Scale indicators13 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Embrace Innovations: India/US social enterprise that designs low-cost infant warmers (the Embrace Warmer) for resource-scarce settings. Directly comparable to Warmilu's IncuBlanket mission, target customer (NICUs in developing countries), and humanitarian distribution model.
• HotHands / HeatMax: Leading US consumer air-activated heat pack brand. Comparable phase-change / chemical warming technology applied to outdoor and consumer use cases — directly analogous to Warmilu's Outdoors WarmCush and GameDay WarmCush lines, though targeting the consumer/outdoor retail channel rather than clinical.
• Heat Factory: US-based manufacturer of single-use and reusable warming products for outdoor, industrial, and medical applications. Comparable technology base (phase-change / chemical warming packs) and overlapping distribution channels, particularly in the outdoor recreation segment.

Emerging players

• Bempu Health: Indian health-tech company producing the Bempu Hypothermia Alert and Apnea Monitor — wearable devices for newborn temperature and respiratory monitoring. Closely comparable target use case (preventing neonatal hypothermia in low-resource hospitals) with overlapping clinical customer base in India and Africa.
• mOm Incubators: UK-based startup producing a portable, low-cost neonatal incubator. Comparable focus on affordable, transportable newborn warming for resource-limited settings, addressing the same clinical problem Warmilu targets.

Broad incumbents

• GE Healthcare: Global medical device incumbent with the Giraffe line of neonatal incubators and warmers. Operates broadly across NICU equipment and competes for the same hospital procurement budgets, though Warmilu targets non-electric / portable use cases that traditional incubators cannot address.
• Dräger: German medical/safety technology company with a significant neonatal care portfolio (e.g., Babytherm, Isolette incubators). Competes in the same hospital newborn-warming category with established global distribution and regulatory infrastructure.
• Philips (Patient Warming / Ambient Experience): Major medical device and patient warming provider with hospital-installed warming systems across perioperative and neonatal care. Comparable in addressing clinical warming needs but operates as part of a much broader portfolio rather than specializing in portable/non-electric infant warming.
• 3M (Bair Hugger Patient Warming): Operates the Bair Hugger forced-air warming franchise, the dominant clinical patient-warming brand globally. Comparable in clinical warming use case but uses a different (electric, forced-air) technology and serves perioperative rather than neonatal settings primarily.

Others

• NEST360: Multi-institution consortium (Rice 360, LSHTM, Northwestern Kellogg, Malawi College of Medicine) that publishes the Newborn Technology Landscape Catalog used by African Ministries of Health. Functions as an ecosystem gatekeeper/curator for neonatal devices in low-resource settings — Warmilu is already included in its catalog.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/warmilu
• Facebookfacebook.com/Warmilu
• LinkedInlinkedin.com/company/warmilu
• Instagraminstagram.com/Warmilu
• TikToktiktok.com/@Warmilu

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Warmilu