Hydrostasis
Hydrostasis develops the GECA Watch, a wearable hydration monitor using proprietary optical sensors and a Personal Hydration Index algorithm paired with a Bluetooth mobile app. The La Jolla-based company sells direct-to-consumer via its e-commerce store, targeting athletes, older adults, and chronic-condition patients.
- Company typePrivate
- Founded2017
- HeadquartersSan Diego, United States
- Headcount1–10
- GTM typeB2C
- OfferingHardware or Manufacturing
What Hydrostasis does
Hydrostasis, Inc. is a privately held biomedical device company founded in 2017 and headquartered in La Jolla, San Diego, California. The company develops wearable hydration-monitoring hardware and software built around a proprietary optical sensor (near-infrared spectroscopy) that detects hydration status through the skin. Its commercial products are the GECA Watch (Gen 1, launched September 2024 and sold out) and the GECA Watch 2.0 (launched December 2025 and sold out again), a wrist-worn wearable that pairs via Bluetooth to a companion mobile app available on Google Play and the Apple App Store. A proprietary Personal Hydration Index™ algorithm translates sensor data into a personalized hydration score and drives real-time color-coded alerts (blue/yellow/red LED indicators) intended to prompt fluid intake before thirst onset.
Hydrostasis sells the GECA Watch line primarily direct-to-consumer through its Shopify-powered e-commerce storefront (shop.hydrostasis.com). As of February 2026, products are HSA/FSA-eligible via a Gale HSA Payments integration. End customers are concentrated in three primary segments: (i) athletes and fitness enthusiasts who need precise hydration timing for performance; (ii) older adults aged 65+ whose diminished thirst signals make dehydration a chronic risk; and (iii) chronic-condition patients (heart failure, kidney disease, dialysis) requiring continuous fluid management. Enterprise relationships with senior-care operators (Azalee Group in Japan), IV-therapy clinics (ASAP IVs), clinical research institutions (UC San Diego Health), and health-equity organizations (Delaware Health Equity Coalition) extend the medical-vertical value proposition, although commercial revenue weight appears anchored in DTC hardware rather than enterprise contracts.
The company's sensor platform is backed by three granted U.S. patents, with the core patent (U.S. Application No. 16/395,148) providing exclusive rights through at least April 2039; GECA™ and Personal Hydration Index™ are registered trademarks. Validation has been pursued through NIH-NHLBI SBIR Phase I funding ($225,000, August 2020), a U.S. Air Force SBIR grant ($50,000), and clinical research spanning dialysis, heart-failure, and healthy-adult cohorts (the latter demonstrating sensitivity to <2% body-weight change from mild dehydration). Hydrostasis is an SOSV portfolio company (Human Health 100 list 2022, 2023, and 2024; Deep Tech 100 in 2025) and a University Lab Partners REALIZE Accelerator graduate. Technology partners include Edge Impulse (on-device Edge AI) and Nordic Semiconductor (wireless connectivity, co-featured at CES 2026). The team is small (1–10 employees per the public profile, with a five-person team noted in 2021), led by founder and CEO Debbie K. Chen, PhD, and co-founder and CTO Michael Shirman.
Hydrostasis firmographics
Firmographics- Name
- Hydrostasis
- Legal name
- Hydrostasis, Inc.
- Website
- https://hydrostasis.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Hydrostasis develops the GECA Watch, a wearable hydration monitor using proprietary optical sensors and a Personal Hydration Index algorithm paired with a Bluetooth mobile app. The La Jolla-based company sells direct-to-consumer via its e-commerce store, targeting athletes, older adults, and chronic-condition patients.
- Ownership category
- akta.pro rank
Hydrostasis industry classification
Industry- Product category
- Wearable Hydration Monitoring Devices
- NAICS
- Electromedical and Electrotherapeutic Apparatus Manufacturing (334510)
- SIC
- Electromedical & Electrotherapeutic Apparatus (3845)
- akta.pro primary industry
- Hydration, Nutrition & Metabolic Tracking Devices (Smart Bottles, Breath/Metabolic Analyzers) (CRACAQAI)
Keywords
Where Hydrostasis is headquartered
LocationHeadquarters
- HQ city
- San Diego
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Hydrostasis business model
Business model- GTM type
- B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Supply Chain, Marketing or Sales, Operations
Revenue model
- GECA Watch Hardware Sales: One-time purchase of wearable hydration monitoring device. GECA Watch and GECA Watch 2.0 sold through own e-commerce storefront. Hardware paired with free mobile app.
- HSA/FSA Eligible Products: Products approved for Health Savings Account and Flexible Spending Account payments, enabling customers to use pre-tax health funds for purchase, expanding accessibility.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | GECA Watch product line with HSA/FSA payment option |
Go-to-market motion3 records
Distribution channels2 records
Marketing channels7 records
Hydrostasis product offering
Product offeringCore offering
Hydrostasis designs, manufactures, and sells the GECA Watch, a wrist-worn wearable that uses proprietary optical sensor technology to detect hydration levels in skin tissue in real time and pairs via Bluetooth with a companion mobile app to deliver personalized hydration insights and color-coded alerts. The company sells the device direct-to-consumer through its own e-commerce storefront with HSA/FSA payment eligibility, targeting older adults, athletes, and chronic condition patients who need continuous non-invasive hydration monitoring.
Product overview
Hydrostasis offers a unified wearable hydration monitoring solution consisting of the GECA Watch (now in its second generation) and a companion mobile app. The core product is the wrist-worn GECA Watch that uses proprietary optical sensor technology to detect hydration levels through light-based sensing. The device pairs with a mobile app via Bluetooth to deliver real-time personalized hydration insights, color-coded status indicators, and intake reminders. The company has expanded from Gen 1 to GECA Watch 2.0 (December 2025), which sold out immediately. The product ecosystem targets athletes, older adults, and individuals with chronic conditions who need proactive hydration monitoring.
Differentiator
Problem solved
Functional benefit
Brands
- GECA Watch: The world's first hydration monitor wearable that warns users to drink water before their body signals thirst. Uses light-based sensor technology to detect hydration levels inside the skin.
- GECA Watch 2.0
Products and services
- GECA Watch (Gen 1) Wrist-worn wearable that monitors hydration status in real time using proprietary optical sensor technology, displaying color-coded indicators (blue/yellow/red) and pairing with a mobile app for personalized insights. Targeted at older adults, athletes, frequent flyers, and individuals seeking proactive hydration tracking.
- GECA Watch 2.0 Second-generation hydration monitoring wearable featuring improved performance, enhanced user experience, broader accessibility, and edge AI on-device processing developed with Edge Impulse for real-time hydration tracking.
- GECA Mobile App
Quantifiable outcome
- GECA Watch sensitive to <2% weight change due to mild dehydration in healthy adults (2022 research)
- +1 more outcomes
Companies that use Hydrostasis
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles3 records
Hydrostasis technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability3 records
Feature4 records
Hydrostasis partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered strategic, core and accelerator.
- Nordic SemiconductorstrategicFeatured in Nordic Semiconductor's two-story booth at CES 2026 alongside Meta, Garmin, Ultrahuman, and other leading wearables. Partnership for wireless connectivity technology enabling GECA Watch functionality.
- Edge ImpulsecoreEdge Impulse collaborated with Hydrostasis to develop edge AI technology for the new GECA Watch wearable device. Enables on-device machine learning processing for real-time hydration detection at Imagine 2025 conference.
- CleveroadcoreCleveroad supported Hydrostasis in developing IoT-based hydration monitoring system processing real-time hydration metrics using wearable sensors, mobile app, and cloud infrastructure. Cleveroad's engineering team contributed to product development for SOSV Deep Tech 100 recognized startup.
- ASAP IVscoreContinued research collaboration with ASAP IVs in Encinitas, CA and Dr. Taylor Graber's team for IV hydration studies. October 2025 research study conducted testing GECA Watch 2.0 during IV hydration therapy.
- University Lab Partners (ULP)acceleratorSelected for REALIZE Accelerator hosted by ULP - Southern California's premier life science incubator. 8-week program providing expert mentorship, funding strategy support, and network access. Demo Day held at UC Irvine Beall Applied Innovation.
- Delaware Health Equity CoalitionstrategicCollaboration to advance health equity in wearable technology and address gaps in serving individuals with darker skin tones, higher BMI, women, and older adults. Led by Dr. Cydney Teal, MD, focusing on inclusive innovation.
- UC San Diego HealthcoreMulti-year clinical collaboration with researchers including Dr. Bethany Karl, Dr. Tomasz Beben, and Eugene Sato of UC San Diego Altman Clinical and Translational Research Institute for development of non-invasive continuous hydration monitoring solution.
- Azalee GroupstrategicPartnership to develop hydration monitoring sensors for Japanese long-term care facilities including Azalee Edogawa Intensive Care Nursing Home, Azalee Annex Carehouse, and Azalee Rehabilitation Club. Japan Society of Functional Recovery Care supports the collaboration for senior wellness.
Scale indicators7 records
Recent moves7 records
Expansion highlights6 records
Hydrostasis competitors and assessment
Company assessmentDirect peers
- Whoop: Subscription-based fitness wearable providing continuous physiological monitoring and recovery insights; comparable to GECA Watch as a dedicated health-metric wearable beyond a standard smartwatch, targeting similar athlete and performance-minded consumers.
- Oura: Smart ring delivering continuous health biometrics (sleep, recovery, readiness) using optical sensors; comparable to Hydrostasis for its optical-biosensor approach to a proprietary personal-health index sold as a consumer wellness device.
- Ultrahuman: Smart ring focused on metabolic health and biomarker tracking, often featured alongside Hydrostasis at Nordic Semiconductor's CES booth; comparable as a category-defining single-purpose metabolic/health wearable.
- HidrateSpark: Smart water bottle that glows and tracks daily water intake via an app; the most direct head-to-head competitor in hydration tracking, although implemented via bottle rather than wearable optical skin sensing.
- Bellabeat: Women's health-focused wearables (e.g., Leaf, Ivy) tracking hydration, stress, and cycle; comparable as a wellness-positioned consumer wearable using biosensors for hydration-adjacent metrics.
Broad incumbents
- Apple (Apple Watch): Dominant mainstream smartwatch that periodically expands its health-sensor suite; represents the broad incumbent threat that any single-purpose health wearable must defend against, especially if hydration tracking is integrated.
- Garmin: Major smartwatch and fitness wearable maker with deep sports and physiological monitoring suites; Hydrostasis was featured alongside Garmin in Nordic Semiconductor's CES 2026 booth, illustrating the incumbent ecosystem context.
- Withings: Connected health device maker (smartwatches, scales, sleep mats) bringing multi-metric biometrics to consumers; comparable as an incumbent expanding the same personal-health monitoring category Hydrostasis targets.
- Fitbit (Google): Mass-market fitness wearable brand owned by Google offering continuous health tracking; comparable broad incumbent whose future sensor roadmap could encroach on dedicated hydration monitoring.
Emerging players
- Levels Health: Continuous glucose monitor-based metabolic insights consumer product; comparable as an emerging single-biomarker wearable company translating clinical biosensing into a subscription-based consumer health experience.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks7 records
Key highlights7 records
Customer concentration
Hydrostasis social profiles
Digital presenceHydrostasis compliance and trust
Trust signalCompliance1 record
Hydrostasis financial estimates
Financial estimateRevenue estimate
Valuation estimate
Hydrostasis leadership team
Management profileNumber of profiles
Profiles5 records
Hydrostasis funding detail
Funding detailFunding overview
Funding rounds2 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Hydrostasis 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 Hydrostasis
What does Hydrostasis do?
Hydrostasis designs, manufactures, and sells the GECA Watch, a wrist-worn wearable that uses proprietary optical sensor technology to detect hydration levels in skin tissue in real time and pairs via Bluetooth with a companion mobile app to deliver personalized hydration insights and color-coded alerts. The company sells the device direct-to-consumer through its own e-commerce storefront with HSA/FSA payment eligibility, targeting older adults, athletes, and chronic condition patients who need continuous non-invasive hydration monitoring.
Is Hydrostasis a public or private company?
Hydrostasis is a private company. It is classified as venture growth investor backed and is currently operating.
When was Hydrostasis founded?
Hydrostasis was founded in 2017. It employs 1 to 10 people.
Where is Hydrostasis based?
Hydrostasis is headquartered in San Diego, United States, in the North America region.
How does Hydrostasis make money?
Two revenue lines are on record. GECA Watch Hardware Sales are the primary driver. The others are HSA/FSA Eligible Products.
Who are Hydrostasis's main competitors?
Direct peers on record are Whoop, Oura, Ultrahuman, HidrateSpark and Bellabeat. Broad incumbents are Apple (Apple Watch), Garmin, Withings and Fitbit (Google). Levels Health is listed as an emerging player.
Does Hydrostasis have an API?
No public API is recorded for Hydrostasis.
What industry is Hydrostasis in?
Hydrostasis's product category is Wearable Hydration Monitoring Devices. Its primary akta.pro industry code is CRACAQAI, Hydration, Nutrition & Metabolic Tracking Devices (Smart Bottles, Breath/Metabolic Analyzers). Its NAICS code is 334510 and its SIC code is 3845.