/Investor DB

J4 Ventures — Full Portfolio

36 tracked investments · listed companies and verified rows first

Apprentaapprenta.co

Apprenta provides software to manage academic investment and scholarship programs, coordinating students, faculty/academic partners, and internal hiring stakeholders through automated workflows and a personalized student portal.

EdTechHR TechSaaS

Amanda Bakerlee(Founder)inJacob Cohen(Founder)in

Co-investorsThe MBA Fund

Atom Limbsatomlimbs.comin

Atom develops artificial limbs using AI and neural interfaces to restore physical ability for people with limb loss.

AI & Machine LearningHealthtechMedical DevicesRobotics

Tyler Hayes(Founder)in

Co-investorsAntigravity CapitalFoundersRolling Fun GP

Bulwarkbulwark.ai

Bulwark is an independent insurance agency that uses technology and licensed advisors to serve high-net-worth individuals and families.

FintechInsurTechSaaS

Brewster Stanislaw(Chief Executive Officer)Ned Sander(President)

Co-investorsArchetype VenturesSBI Holdings

Curegetcure.appinMay 2026

CURE operates a booking platform that connects pharmacies with delivery service partners to generate online orders.

B2B MarketplacesHealthtechSaaSBerlin, DE

Manuel Aberle(Founder)in

Co-investorsAbstract VenturesArtis VenturesFJ LabsJ12 VenturesStella CapitalAccel+23 more

DaisyChain Energydaisychain.energyinMay 2026

DaisyChain Energy offers an AI-enabled software platform for managing electric load, including monitoring usage, optimizing load profiles, controlling devices like batteries and EV chargers, and handling electrification, decarbonization, and compliance.

AI & Machine LearningCleantechEnergyBrooklyn, US

Alex Blumberg(CEO)inBob Currie(CTO)Amit Singh(CFO)Jackson Lehr(COO)inMcGowan Southworth(President & EIO)

BoardDavid Aronoff(Director)in

Co-investorsCity LightFlybridge Capital Partners

Enviveenvive.aiin

Envive provides an AI intelligence layer for eCommerce brands, offering an "Adaptive Storefront" sales agent that converts shopper questions into personalized recommendations across on-site, email, SMS, landing pages, and product pages.

AI & Machine LearningE-commerceRetail TechSan Francisco, US

Aniket Deosthali(Founder)Sameer Singh(Founder)inIz Beltagy(Founder)inMatthew Peters(Founder)inAniket D(Founder)

Co-investorsAllen Institute for AI (AI2) IncubatorAscend Venture CapitalFUSEPoint72 VenturesAI2 IncubatorAscend

Ethosethossystems.comin𝕏

Ethos Systems provides an AI-driven training platform that delivers personalized, role-specific learning content and ties training to performance data for readiness measurement.

AI & Machine LearningDefense TechEdTechSaaS

Andrew Powell(Founder)inSasha Seymore(Founder)inTommy Hatton(Founder)

Co-investorsCubit CapitalDefense AngelsDorm RoomMountain Group CapitalMVP VenturesNorwest Venture Partners+4 more

Ethosphereethosphere.aiinSep 2025 · $2.5M

Ethosphere is a privacy-first platform that records and analyzes in-person, customer-facing conversations on the retail sales floor to generate coaching feedback for associates, action steps for managers, and fleet-wide performance insights for brands.

AI & Machine LearningHR TechRetail TechSeattle, US

Curran Dougherty(Founder)inAhad Rana(Founder)Evan Smith(Founder)

Co-investorsAllen Institute for AI (AI2) IncubatorPoint72 VenturesAI2 IncubatorHike Ventures

Giantgiant.org

Giant creates personalized, interactive digital stories for children that adapt to their names, voices, and interests.

ConsumerEdTechMedia & Entertainment

John Kobs(CEO & Founder)in

Co-investorsDecasonicFJ LabsLightShed VenturesPerceptive Ventures Management Company, LlcWestern Technology Investment

Gooey.AIgooey.aiin

Gooey.AI provides an AI agent builder platform that enables users to create and deploy conversational agents with support for multiple large language models, speech recognition, and knowledge base integration.

AI & Machine LearningDeveloper ToolsImpact & Social GoodSaaS

Sean Blagsvedt(Founder)inDev Aggarwal(Founder)inArchana Prasad(Founder)in

Hearvanahearvana.aiNov 2025

Hearvana is developing acoustic intelligence technology aimed at enhancing listening capabilities for both humans and machines.

AI & Machine LearningDeep TechHardware

Shyam Gollakota(Founder)inMalek Itani(Founder)inTuochao Chen(Founder)

Co-investorsAllen Institute for AI (AI2) IncubatorAscend Venture CapitalPoint72 VenturesSCB 10XAI2 IncubatorAmazon Alexa Fund+6 more

In The Loopintheloopai.com

Thrift Production System is software that uses AI to automate pricing, grading, and product listing for thrift stores and resale businesses.

AI & Machine LearningRetail TechSaaS

Journey Meditationjourneyhealth.io

Journey Health is a healthcare company that delivers digital health services and support for vulnerable patients and underserved communities.

Digital HealthHealthtechOakland, US

Co-investors37 AngelsCanaan PartnersBDMIBetaworks

LearnLuxlearnlux.comin

LearnLux provides personalized financial guidance to employees through employers, covering budgeting, debt management, benefits navigation, and long-term planning delivered by credentialed financial planners on a fiduciary basis.

FintechHR TechSaaSWellness & FitnessBoston, US

Rebecca Liebman(Founder)inMichael Liebman(Founder)in

Co-investorsCrosslink CapitalDorm RoomEntrepreneurs Roundtable Accelerator (ERA)Moai CapitalUnderscore VCBlumberg Capital+3 more

Molten Industriesmoltenindustries.comin𝕏

Molten Industries develops chemical reactor technology that splits natural gas into hydrogen and graphite using electrical resistive heating for battery anode production and industrial hydrogen supply.

Advanced ManufacturingCleantechEnergyNew MaterialsWest Oakland, US

KevininCaleb Boyd(Founder)inKevin Bush(Founder)

Co-investorsATEL VenturesBreakthrough Energy VenturesFifty YearsMoai CapitalSozo VenturesUnion Square Ventures (USV)+1 more

Nectarusenectar.comin𝕏

Nectar offers investment opportunities in mezzanine debt and preferred equity issued by real estate operators managing low-leverage, cash-flowing properties.

AI & Machine LearningFintechPropTechAtlanta, US

Derrick Barker(Founder)in

Co-investorsMoai CapitalRareBreed VenturesService Provider CapitalTechstarsGV (Google Ventures)Menlo+2 more

Propiojoinpropio.comin𝕏

Propio provides an AI-powered accounting and tax platform designed for accounting firms to automate bookkeeping, tax planning, and advisory services.

AI & Machine LearningFintechHR TechImpact & Social GoodInsurTechSaaSWashington, US

Co-investorsTechstars

Refercardinalrefer.comin

Palo Alto, US

Andre Hamra(Founder)Davi Reis Vieira de Souza(Founder)Felipe Aued(Founder)

Co-investorsNorte Ventures

Resetgetreset.co

Menlo Park, US

Wes Rodriguez(Founder)

Co-investorsThe 23 Fund

Saviosavio.mxin

Savio is a collections and invoicing platform that lets businesses issue CFDI 4.0 invoices, generate payment links, send automated payment reminders, and reconcile bank accounts with AI.

AI & Machine LearningFintechSaaS

Manuel Llaguno(Founder)in

Co-investorsTinySeed

Savvlysavvly.comin

Savvly offers an SEC-registered investment vehicle designed for extended retirement spans, providing scheduled cash payouts at ages 80, 85, 90, and 95 through a pooled S&P 500 index fund with longevity-focused reallocation.

FintechInsurTechLongevityBoulder, US

Dario Fusato(Founder)in

Co-investorsMoai CapitalTechstarsTenacity Venture Capital

Scoutscoutftw.com

Scout provides financial advisory and wealth management services for college athletes, particularly those benefiting from NIL (Name, Image, Likeness) opportunities.

Fintech

Michael Haddix Jr(Founder)in

Co-investors125 VenturesAusum VenturesMoai CapitalOUTBOUND CAPITALSymphonic CapitalChingona Ventures+1 more

Sonarsonar.appin𝕏acquired by Aave

ConsumerCrypto & Web3GamingSocialSan Francisco, US

Benjamin South Lee(Founder)inLeo Cho(Founder)inRandolph Lee(Founder)inDrew Barvir(Founder)Freddy Mallet(Founder)Olivier Gaudin(Founder)

Co-investorsY CombinatorFirstMark CapitalGSR VenturesImpact America FundIndex VenturesNina Capital

Sonarsonarmentalhealth.cominFeb 2025 · $9.5M

Sonar builds technology for early identification of and intervention in youth mental health challenges, aiming to help students build support networks for preventative mental healthcare.

Digital HealthHealthtechMental Health

Drew Barvir(Founder)inGabriel MoynihanGabe

Co-investors500 GlobalInformed Ventures Advisors, LlcMaccabee VenturesNina CapitalThe 23 FundThe MBA Fund+1 more

Sonarsendsonar.comin𝕏Feb 2025 · $9.5M

Sonar is a business text messaging platform that helps sales and marketing teams engage with customers via SMS, incorporating AI and chatbots to optimize mobile channel performance and drive conversions.

AI & Machine LearningDeveloper ToolsMarketing TechMedia & EntertainmentSaaSSales Tech

Matthew Bermanin

Co-investors500 GlobalGSR VenturesNina Capital

Sound Healthsoundhealth.lifein𝕏

SoundHealth develops FDA 510(k) cleared, drug-free medical devices that use acoustic resonance therapy via forehead bone conduction to treat nasal congestion and improve sleep.

AI & Machine LearningDigital HealthMedical Devices

Paramesh Gopi, PhD(Founder & CEO)Bryant Lin, MD, MEng(Founder & Head of Clinical Affairs and Product Design)Peter Hwang, MD(Founder & Head of Research)

Co-investorsG Vision CapitalMoai CapitalTau VenturesxNova VC (Aries)ShangBay Capital LLC

Take2.aitake2.aiin

Take2 provides AI agents to automate screening and initial interviews for healthcare organizations, reducing recruiter workload and accelerating hiring timelines for clinical and non-clinical roles.

AI & Machine LearningHealthtechHR TechNew York City, US

Co-investorsGurtin VenturesHoneystone VenturesMoai CapitalSamvid VenturesSemperVirens Venture CapitalTechstars+1 more

Tandemtandemspace.comin𝕏Seed

Tandem is a marketplace that simplifies commercial office space search for companies by consolidating market access, verified pricing and availability, and expert negotiation support in one platform.

B2B MarketplacesEnterprise SoftwareMarketplacesPropTechSaaSSan Francisco, US

Rafi Sands(Founder)inSean Miller(Founder)inBrendan Suh(Founder)inBen Lowenstein(Founder)inChristophe Barre(Founder)inAl Harth Al-janaby(Founder)

Co-investorsPioneerSoma CapitalThe 23 FundThe MBA FundY Combinator1984 Ventures Management, Llc+29 more

Tough Daytough.dayin

Tuffy is an AI-based workplace assistant that gives employees on-demand, confidential guidance to navigate change, workplace challenges, and interpersonal dynamics, built on curated management, HR, and employment law content and tailored to each organization's policies and culture.

AI & Machine LearningFuture of WorkHR TechNew York City, US

Katherine von Jan(Founder)in

Co-investorsBlue Tulip VenturesJHH vcRed Bear VenturesBlu Venture InvestorsCatapult CapitalDivergent Capital+1 more

UpLinkuplinkapp.ioinSeedAcquired

UpLink is an AI-powered platform for processing client documents and evidence collection in audit workflows.

AI & Machine LearningEnterprise SoftwareFuture of WorkSaaSPalm Beach Gardens, US

Alexander Maher(Founder)inAlexander Grant(Founder)inBrady Ochse(Founder)inNicholas Yarmesch(Founder)inTakashi Asai(Founder)

Co-investorsY CombinatorA100X VenturesBragiel BrothersMustard Seed

Upwageupwage.comJun 2023

Upwage builds an AI-powered job marketplace that uses AI interviewing agents to reduce bias and increase fairness in hiring for jobseekers, employers, and workers displaced by AI.

AI & Machine LearningEnterprise SoftwareFuture of WorkHR TechPowell, US

Diana Tsai(Founder)inGreg Call(Founder)inSantiago Leon(Product Manager and Founding Member)inNate Babbel(CTO and Founding Member)inElliot Manson(Head of Marketing and Founding Member)in

BoardTanya Beja(Director)in

Co-investorsAlleyCorpBBG VenturesBloomberg BetaCore Venture CapitalMoai CapitalAlley Robotics Ventures+4 more

Upward Financialupwardli.comin𝕏

Upward provides software infrastructure for companies to launch credit products that increase credit visibility for consumers, helping lenders achieve higher approval rates while offering consumers access to lower interest rates.

FintechSaaSSeattle, US

Aaron Gregory(CEO & Co-founder)inChris Hasz(CTO & Co-Founder)inDanielle Hill(COO & Co-founder)in

BoardCatherine Williams(Director)inWilliam Finney(Director)

Co-investorsAltari VenturesBreakwater VenturesCyberAgent CapitalDundee Venture CapitalLong Way VenturesMoai Capital+6 more

Wordwarewordware.aiin𝕏

Wordware is an AI context lab that has developed Sauna, an intelligent workspace assistant designed to learn user preferences, detect patterns, and automate routine tasks to enhance deep work productivity.

AI & Machine LearningConsumerData & InfrastructureDeveloper ToolsEnterprise SoftwareFuture of WorkSaaSSan Francisco, US

Filip Kozera(Founder)inRobert Chandler(Founder)inFilip Kozera Robert Chandler(Founder)

Co-investorsBalnord Sp. z o.o.Day One VenturesFelicis VenturesFirestreak VenturesInnovation NestY Combinator+9 more

Yoodli AIyoodli.aiin𝕏Jun 2022

Yoodli is an AI-powered platform that provides interactive roleplay scenarios to help users improve their communication skills and public speaking confidence.

AI & Machine LearningEdTechSaaSSales TechSeattle, US

Varun Puri(Founder)inEsha J.(Chief Customer Officer, Co-founder)Esha Joshi(Founder)in

BoardPatrick Ennis(Director)inNeeraj Hablani(Director)in

Co-investorsNotable CapitalAllen Institute for AI (AI2) IncubatorAllen Institute for Artificial Intelligence Incubator (AI2)Ascend Venture CapitalMadrona Venture GroupMadrona Venture Labs+4 more

Zeltazelta.aiin

Jersey City, US

Pierce Healy(Founder)in

Co-investorsTechstars

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Ruby Money

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.