Lumen

What Lumen does

Lumen (legally Meta Flow Ltd., headquartered at 30 Ha'arba'a Street, Tel Aviv, Israel) is a privately held consumer health-technology company that develops and sells a handheld breath-analysis device and companion mobile app capable of measuring metabolism in real time from a single exhaled breath. The device analyzes the CO2 concentration in the user's breath to determine whether the body is primarily burning fat or carbohydrates, and feeds this signal into a personalized nutrition, exercise, sleep, and stress guidance engine delivered through the Lumen App (iOS/Android, integrated with Apple Health Kit and Google Fit). Lumen's core technology is validated against the gold-standard metabolic cart in multiple peer-reviewed clinical studies conducted with research partners including TUM, Purdue, Colorado State, Middlesex University London, Tel Aviv Sourasky Medical Center, RAMBAM Health Care Campus, and the University of Toronto.

The company operates a hybrid go-to-market spanning direct-to-consumer e-commerce (device + subscription, sold via lumen.me at a $199 promotional price, 30-day money-back guarantee, HSA/FSA accepted), a B2B health-professional channel (Lumen for Health Professionals, with a Lumen Data Dashboard, Lumen Academy, and remote patient monitoring for clinics across 13+ countries), a global affiliate program (Impact.com), a Lumen Expert influencer program, and an in-app referral program. Revenue is generated from one-time hardware sales, tiered subscriptions (1/3/6/12-month, Lifetime, Duo), optional Add-Ons (Nutrition Guidance, AI features), B2B clinic services, and affiliate/influencer revenue share. The company reports 300K+ Lumeners, 200K+ platform members, 80M+ metabolic measurements, 100M+ breaths, and 10,000+ 5-star Trustpilot reviews.

Lumen is led by co-founders Daniel Tal (CEO), Avi Smila (CIO), Dror Ceder (CGO), Merav Mor (CSO), and Michal Mor (Head of Science for Product), with an interim COO/CFO and a VP of Marketing. The company has raised approximately $72.3M in cumulative funding, most recently a $62M Series B in December 2022 led by Pitango Venture Capital, earmarked for global expansion, app improvement, and research collaborations. The US entity Lumen, Inc. operates as a wholly owned affiliate for US data and consumer-health-data handling.

Name

Lumen

Legal name

Meta Flow Ltd.

Website

https://lumen.me

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

51–100 employees

Short description

Lumen (Meta Flow Ltd., Tel Aviv) sells a handheld breath-analysis device and companion app that measures metabolism in a single breath (CO2-based fat vs carb detection) and delivers personalized nutrition and lifestyle guidance, serving health-conscious consumers and weight-management clinics globally.

Ownership category

akta.pro rank

Headquarters

HQ city

Tel Aviv

HQ country

Israel

HQ region

Middle East

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Lumen device hardware sales: One-time sale of the Lumen handheld metabolism tracker via the Lumen e-commerce storefront (promo price $199 for Prime Day, regular pricing implied). Refunds available within 30 days; non-returnable accessories. Direct-to-consumer hardware revenue stream.
2. Lumen App Subscription (monthly/3/6/12-month, Lifetime, Duo): Recurring app subscription unlocks the full Lumen service: real-time personalized nutrition, lifestyle, and metabolic-flexibility guidance. Plans available in 1, 3, 6, and 12 month Initial/Renewal Terms with auto-renewal; a non-renewing Lifetime Subscription grants access to features available as of purchase date (excludes Add-Ons); Duo Subscription allows two Users under one account using the same device.
3. Add-On memberships (Nutrition Guidance, AI features): Optional Add-On memberships available at initial purchase or post-purchase; can be one-time (e.g., three months) or recurring (e.g., monthly). Nutrition Guidance Program and designated AI features are sold as Add-Ons, separate from base Subscription.
4. B2B / health-professional clinic services: Clinics and healthcare providers purchase Lumen devices and the Lumen Data Dashboard to deliver remote patient metabolic monitoring, with onboarding, training, and Lumen Academy access; case-study claims 200% increase in program revenue and 51% improvement in patient metabolism over 6 months.
5. Affiliate/Expert program revenue share: Commission-based revenue from affiliate partners and Lumen Experts (influencers/personal trainers) earning revenue share on Lumen product sales driven from their content; Lumen Experts receive a free device plus performance-based revenue.

Pricing tiers

Go-to-market motion5 records

Distribution channels6 records

Marketing channels11 records

Core offering

Lumen develops and sells a handheld, portable breath-analysis device (Lumen Device) paired with a companion iOS/Android mobile app (Lumen App). The device measures CO2 concentration in a single exhaled breath to determine in real time whether the user is burning fat or carbohydrates, and the app converts those measurements into personalized daily meal plans, lifestyle, and metabolic-flexibility guidance. The company monetizes the device as a one-time hardware sale and the guidance as recurring app subscriptions, with an additional B2B layer for health professionals and clinics.

Product overview

Lumen is offered as an integrated consumer health platform composed of a core hardware product, the Lumen Device, paired with the companion Lumen App. The Device and App form the foundation of the offering: the handheld device measures metabolism in a single breath via CO2 analysis, and the App turns those measurements into personalized daily meal plans, lifestyle guidance, and progress tracking. On top of this core, Lumen sells a tiered Subscription (including a Lifetime Subscription and Duo Subscription) and a set of Add-On modules such as the Nutrition Guidance Program, AI Features, and dedicated Weight Loss and Intermittent Fasting Programs. Lumen also operates a B2B layer — Lumen for Health Professionals — which packages the same device with the Lumen Data Dashboard, Lumen Academy training, onboarding, and weekly reporting for clinics and practitioners. User acquisition and engagement are supported by the Lumen Community, the Lumen Referral Program, the Lumen Affiliate Program (on Impact.com), and the Lumen Expert influencer program. The full portfolio is owned and operated by Meta Flow Ltd. (d/b/a Lumen), based in Tel Aviv, Israel.

Differentiator

Problem solved

Functional benefit

Brands

• Lumen Device: The hand-held metabolic measurement device (breath analyzer) produced by Meta Flow Ltd.
• Lumen App

Products and services

• Lumen Device (handheld metabolism tracker) Handheld, portable breath-analysis device that measures CO2 concentration in a single exhaled breath to determine in real time whether the user is burning fat or carbohydrates. Pairs via Bluetooth with the Lumen iOS/Android app. Sold via lumen.me; 30-day money-back guarantee; charges via docking station or USB-C to USB-A; one-year limited warranty.
• Lumen App (companion mobile application) iOS and Android companion app for the Lumen Device that provides personalized daily meal plans, lifestyle and nutrition guidance, tracks metabolic flexibility, and integrates with Apple Health Kit and Google Fit. Available on the App Store and Google Play.
• Lumen Weight Loss Programs Structured weight loss programs powered by the Lumen device and app, providing guided metabolic monitoring and personalized nutrition plans for weight loss.
• Lumen Intermittent Fasting Program Personalized intermittent fasting program that adapts the user's fasting window daily based on real-time breath-based metabolic biofeedback, designed to maximize fat burn and prevent muscle breakdown.
• Lumen Nutrition Guidance Program (Add-On) Subscription Add-On offering personalized nutrition guidance from Lumen, sold separately from the core Lumen Subscription and available at initial purchase or post-purchase as one-time or recurring.
• Lumen AI Features (Add-On) AI-powered features offered as a recurring or one-time Add-On to the Lumen Subscription, separate from the Lifetime Subscription scope.
• Lumen for Health Professionals (Clinic / B2B Platform) Remote patient monitoring platform for doctors and clinics that bundles the Lumen device, the Lumen Data Dashboard, onboarding, Lumen Academy training, marketing materials, and weekly patient reporting summaries to enable clinic-led weight-management and metabolic coaching programs.
• Lumen Academy Education and training program for clinicians using the Lumen device, covering metabolic data interpretation, patient data management, and clinic marketing materials. Bundled with the Lumen for Health Professionals B2B offering.
• Lumen Affiliate Program (via Impact.com) Global affiliate program run on the Impact.com platform that allows publishers, bloggers, and social creators to sign up and earn commission on Lumen product sales driven from their content, with extra monthly performance-based incentives.
• Lumen Expert Program (Influencer) Influencer program on the Impact.com platform offering approved YouTube, Facebook, Instagram, Twitter, and blog creators a free Lumen device and unlimited performance-based revenue in exchange for original content about metabolic health.

Quantifiable outcome

• Up to 12% of body weight lost in just 6 months
• +7 more outcomes

Named customers21 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

AI capability10 records

Feature5 records

Partnerships

20 partnerships are on record, tiered core research partner, core clinical research partner, supporting research partner, core integration, supporting marketing partner, core affiliate platform partner, supporting payment partner, core payment partner, statutory representative, corporate group affiliate, supporting authentication partner and supporting gtm partner.

• TUM (Technische Universität München)core research partnerStrategic or Co-development PartnerTUM is listed as a Lumen research partner on the homepage, conducting metabolism research with the Lumen device.
• Purdue Universitycore research partnerStrategic or Co-development PartnerPurdue University is listed as a Lumen research partner on the homepage, with a forthcoming clinical study on the gastric effect of slow vs rapid digestion carbs using the Lumen device.
• Colorado State Universitycore research partnerStrategic or Co-development PartnerColorado State University is listed as a Lumen research partner, with a forthcoming clinical study on time-restricted feeding to mitigate metabolic impairments during circadian misalignment.
• Middlesex University Londoncore research partnerStrategic or Co-development PartnerMiddlesex University London is listed as a Lumen research partner on the homepage.
• Tel Aviv Sourasky Medical Center (Ichilov)core clinical research partnerStrategic or Co-development PartnerTel Aviv Sourasky Medical Center (Ichilov) is a Lumen research partner and conducted the pilot clinical trial on metabolic control in prediabetic adults, published in PubMed (36195053).
• RAMBAM Health Care Campuscore research partnerStrategic or Co-development PartnerRAMBAM Health Care Campus is listed as a Lumen research partner on the homepage.
• University of Torontocore clinical research partnerStrategic or Co-development PartnerUniversity of Toronto conducted a January 2023 clinical trial on the effect of morning bodyweight interval exercise, using the Lumen device (Alexa Govette MSc thesis).
• ARU (Anglia Ruskin University)supporting research partnerStrategic or Co-development PartnerARU is listed among Lumen's rooted-in-science research partners on the health-professionals page.
• SFSU (San Francisco State University)supporting research partnerStrategic or Co-development PartnerSFSU is listed among Lumen's rooted-in-science research partners on the health-professionals page.
• Apple Health Kitcore integrationTechnology or IntegrationThe Lumen app integrates with Apple Health Kit to unify breath, body activity, sleep, heart rate, and dietary data for personalized metabolic insights.
• Google Fit (Android Fit)core integrationTechnology or IntegrationThe Lumen app integrates with Google Fit (Android Fit) to unify breath, body activity, sleep, heart rate, and dietary data for personalized metabolic insights.
• AppLovinsupporting marketing partnerGTM or Marketing PartnerAppLovin is an advertising partner that receives usage data and device identifiers from Lumen in order to deliver personalized advertising, measure campaign effectiveness, and improve user experience, per Lumen's privacy policy.
• Impact.comcore affiliate platform partnerChannel Partner/ Reseller/ DistributorLumen runs its global affiliate and Lumen Expert programs on the Impact.com platform, where publishers and influencers sign up and earn commission on Lumen product sales.
• PayPalsupporting payment partnerTechnology or IntegrationPayPal is one of Lumen's third-party payment processors used to collect Subscription, Add-On, and device fees.
• Stripecore payment partnerTechnology or IntegrationStripe is one of Lumen's third-party payment processors used to collect Subscription, Add-On, and device fees via credit card.
• European Data Protection Office (EDPO)statutory representativeOthersEDPO is Lumen's appointed GDPR representative in the EU (Article 27), contactable at Avenue Huart Hamoir 71, 1030 Brussels, Belgium, for GDPR-related inquiries.
• EDPO UK Ltdstatutory representativeOthersEDPO UK is Lumen's appointed UK GDPR representative (Article 27), located at Unit 33, Waterside, Schooner Court, 44-48 Wharf Road, London, N1 7UX, UK.
• Lumen, Inc.corporate group affiliateOthersLumen, Inc. is Lumen's affiliated US entity; Meta Flow Ltd. (d/b/a Lumen) shares Consumer Health Data and other Personal Information with Lumen, Inc. as part of its affiliated companies under the privacy policy.
• Apple / Google (single sign-on)supporting authentication partnerTechnology or IntegrationUsers can sign in to Lumen via Apple, Google, or other third-party services; Lumen collects the user ID and username associated with those services.
• Social platforms (Instagram, Facebook, X, Pinterest, YouTube, etc.)supporting gtm partnerGTM or Marketing PartnerUsers may connect their Lumen account with social platforms for sign-in and content sharing; social platforms may also give Lumen automatic access to public profile and engagement data.

Scale indicators12 records

Recent moves6 records

Expansion highlights8 records

Direct peers

• Levels Health: Direct-to-consumer metabolic health company that sells a continuous glucose monitor subscription and personalized nutrition guidance. Closest analog to Lumen in category, target customer, and subscription-plus-hardware GTM.
• Zoe: Personalized nutrition platform combining at-home blood-fat and blood-sugar tests with a subscription coaching app. Targets the same 'eat for your metabolism' consumer and is a near-direct competitor in personalized metabolic nutrition.
• Signos: Metabolic health platform pairing a CGM with an AI coaching app for weight loss. Overlaps Lumen on the GLP-1 and weight-loss use cases with a similar subscription-plus-device consumer model.
• Ultrahuman: Consumer metabolic-health company selling the M1 continuous glucose monitor and Ring AIR sleep/fitness wearable under one subscription. Competes for the same health-conscious, performance-oriented buyer that Lumen targets.

Emerging players

• NutriSense: Subscription CGM service with personalized nutritionist coaching. Smaller and more niche than Levels, but pursues the same CGM-as-metabolic-coach value proposition that competes with Lumen for wellness-driven consumers.

Broad incumbents

• Withings: Established connected-health hardware maker (smart scales, watches, sleep analyzers) with a subscription health app. Sells into a similar health-conscious consumer via app-store and DTC channels and overlaps with Lumen on body-composition tracking.
• Oura: Subscription-led smart ring focused on sleep, recovery and readiness. Sells to the same health-and-performance buyer through a comparable hardware-plus-membership model and competes for share-of-wallet on metabolic insights.
• Whoop: Membership-based fitness and recovery wearable with a strain/sleep/recovery dashboard. Targets the same fitness-performance persona as Lumen's fitness use case and competes for premium subscription dollars.
• Dexcom: Leading continuous glucose monitor company whose consumer and adjacent-metabolic-health positioning pressures the metabolic-wellness category Lumen plays in, even though Lumen's modality is breath-based CO2 rather than interstitial glucose.
• Abbott (FreeStyle Libre): Global CGM leader expanding into mass-market consumer metabolic health. Its scale and pharmacy distribution set a competitive ceiling for the entire personalized-metabolic-health niche, including Lumen's GLP-1 support use case.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat7 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/LumenMetabolism
• YouTubeyoutube.com/channel/UC3XkEyGUMXfRhZcB0Ve_fQQ
• Facebookfacebook.com/Lumen.me
• LinkedInlinkedin.com/company/lumen-me
• Instagraminstagram.com/lumen.me
• Pinterestpinterest.com/MyLumen
• TikToktiktok.com/@lumenme

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries1 record

Funding overview

Funding rounds9 records

Investors16 records

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 Lumen