Helium-3 Ventures
Venture capitalNew York · Seed–Series B · 3 people tracked
Investment thesis
Helium-3 Ventures invests in founders building exciting and innovative companies for earth and beyond. Its portfolio spans deep tech, space, energy, climate, robotics, and consumer/enterprise software, reflecting a broad approach to backing category-defining startups. The firm emphasizes hands-on founder support, offering hiring and recruiting help, access to the Columbia University network of faculty, students, and alumni, brand and marketing support from influential partners and advisors, on-demand office space in New York City, proprietary data resources, and introductions from an extensive network of executives for customer and distribution opportunities.
Source: firm website, verified Aug 7, 2026.
Team · 3 people
from public directories
What they invest in
from 29 of 41 portfolio companiesCleantech ×9Deep Tech ×9Hardware ×8Advanced Manufacturing ×7AI & Machine Learning ×6Biotech ×5Energy ×5SaaS ×5
HQs:United States×21Canada×2United Kingdom×1
Investments · 41 tracked
founders shown can be your intro pathBy year:2024 · 12023 · 12022 · 12021 · 14 dated
General Fusion develops Magnetized Target Fusion (MTF) technology, combining plasma physics, mechanical compression, and liquid metal systems to build a practical, cost-competitive fusion power plant.
CleantechDeep TechEnergyBurnaby, CA
Michael Laberge(Executive Officer)Nathan Gilliland(Executive Officer, Director)Susan Koch(Executive Officer)Greg Twinney(Executive Officer, Director)Megan Wilson(Chief Strategy Officer)Norman Harrison(Director)
Co-investorsBraemar Energy VenturesChrysalixEvolution VC PartnersJIMCONew Ground VenturesPender Growth Fund+4 more
Reducing methane emissions from cattle by 97%
Alga Biosciences develops feed additives that reduce methane emissions from cattle — cutting cow burps to combat climate change.
Advanced ManufacturingAgTechBiotechClimate TechSan Francisco, US
Alex Brown(Co-founder and CEO)Daria Balatsky(Founder)inCaroline McKeon(Founder)inAlexander Brown(Founder)in
Co-investorsY CombinatorDay One VenturesAngel Collective Opportunity FundCollaborative FundCool Climate CollectiveJetstream+4 more
Astranis manufactures small, high-powered geosynchronous satellites equipped with advanced digital processing technology for global telecommunications and connectivity services.
Advanced ManufacturingDeep TechHardwareSpace TechSan Francisco, US
John Gedmark(Founder/CEO)inRyan McLinko(Founder/CTO)in
Co-investorsAndreessen HorowitzBlack FlagBoxGroupCantos VenturesCherubic VenturesCommonweal Ventures+36 more
Toronto
Prashant Shukla(Director)Li Nan Ouyang(Executive Officer, Director)
BoardAdam Struck(Director)in
Co-investorsFlucas VenturesHyde Park Venture PartnersWestern Technology InvestmentStruck Capital
Boom Supersonic develops supersonic aircraft and engines, including the Overture commercial airliner and the Symphony turbofan engine, targeting commercial aviation and advanced infrastructure applications.
Advanced ManufacturingDeep TechHardwareSpace TechCentennial, US
Blake Scholl(Founder/CEO)in
Co-investorsActivant CapitalAltra VentureAngel Collective Opportunity FundBessemer Venture PartnersCaruso VenturesDraper Associates+23 more
Cart.com provides unified commerce and logistics software and services that enable companies to sell and fulfill orders across multiple channels.
E-commerceLogistics & Supply ChainSaaSHouston, US
Omair Tariq(Founder and CEO)inJim Jacobsen(Director)Jim Jacobson(Director)
BoardAlan Miller(Director)Scott Calliham(Director)Blair Garrou(Director)in
Co-investorsAngel Collective Opportunity FundBeyond CapitalCapital FactoryCincyTecheGateway CapitalInvestX+15 more
Contraline develops new contraceptive and reproductive health technologies, with a focus on male contraception.
BiotechDigital HealthMedical DevicesCharlottesville, US
Kevin S Eisenfrats(Executive Officer, Director, Promoter)Kevin Eisenfrats(Co-Founder and CEO)John Herr(Co-Founder)
BoardIris Van Alderwerelt van Rosenburgh(Director)Gurdane Bhutani(Director)inMartin J Emerson(Director)
Co-investorsBiotechnology Value FundMBX CapitalAllied Venture PartnersAmboy Street VenturesAurum Venture PartnersBeni Venture Capital+14 more
DigiBuild is a construction procurement platform that helps general contractors, subcontractors, and property owners source materials, reduce costs, and maintain project timelines.
AI & Machine LearningB2B MarketplacesConstruction TechEnterprise SoftwarePropTechSaaSMiami, US
Robert Salvador(Founder)inIvan Franco(Founder)in
Co-investorsPICUS CAPITALDraper AssociatesCathexis VenturesChain ReactionNeer Venture PartnersY Combinator+2 more
Humanoid robot platform for AI research and human interaction
Exa is an AI-powered search API that retrieves high-quality information from the web in real-time, designed for AI agents, developers, and applications that require precise natural-language search capabilities.
AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareSan Francisco, US
William Bryk(co-founder/CEO)inJeffrey Wang(Founder)inWalden Yan(Co-Founder)
Co-investors137 VenturesAndreessen HorowitzFelicis VenturesHaystackLightspeed Venture PartnersSLVC+8 more
Figure develops general-purpose humanoid robots designed for deployment in workforce and home environments.
AI & Machine LearningHardwareRoboticsSunnyvale, US
Brett Adcock(Executive Officer, Director)Lee Randaccio(Executive Officer)Dana Berlin(Executive Officer)Logan Berkowitz(Executive Officer)Colby Adcock(Director)Peter Welinder(Director)
Co-investorsAUDEO VENTURESAurum Venture PartnersBeyond CapitalBold Capital PartnersBVVCEvolution VC Partners+22 more
Turning organic waste into biodegradable plastics
Genecis commercializes the production of polyhydroxyalkanoate (PHA), a biodegradable polymer made from bacteria that consume organic waste, offering a sustainable alternative to petroleum-based plastics for packaging, textiles, medical devices, and other applications.
Advanced ManufacturingBiotechCircular EconomyCleantechClimate TechRoboticsToronto, CA
Luna Yu(Founder)in
Co-investorsAllied Venture PartnersAsymmetry VenturesBeresford VenturesCeltic House Asia PartnersEmerald Technology Ventures AgY Combinator
Joy provides customizable wedding websites and planning tools for couples organizing their weddings.
B2B MarketplacesConsumerDirect to ConsumerE-commerceMarketplacesSaaSSan Francisco, US
Vishal Joshi(Founder/CEO)inDorian Bach(Founder)inKaiwalya Kher(Founder/CTO)in
Co-investorsFernbrook Capital ManagementKube VCMVP VenturesObvious VenturesOlive Tree CapitalRachel Zoe Ventures+12 more
LineLeap operates a mobile app that allows nightlife customers to skip venue lines, purchase cover charges, buy event tickets, and order drinks at bars and clubs.
ConsumerFoodTechFuture of WorkMarketplacesNew York City, US
Nicholas Becker(Founder)inMax Schauff(Founder)inPatrick Skelly(Founder)in
Co-investorsAltaIR CapitaleLab Venturesgener8torGoat Rodeo CapitalGreat Oaks Venture CapitalRaptor Group+3 more
AI-powered robotic metal fabrication
Machina Labs builds and operates software-defined factories using AI-guided robotics to manufacture complex metal structures and components from digital designs.
Advanced ManufacturingAI & Machine LearningRoboticsChatsworth, US
Edward Mehr(Executive Officer, Director)Babak Raeisi Nia(Executive Officer, Director)
BoardPeter Lee(Director)Scott Brady(Director)inSam Smith-Eppsteiner(Director)in
Co-investorsAIX VenturesAtento CapitalBalerion Space VenturesCadron Capital PartnersCongruent VenturesPredictive VC+10 more
Customizable, affordable glasses for all
Pair Eyewear designs and sells prescription and non-prescription eyeglasses with swappable frame tops that allow customers to change styles.
ConsumerDirect to ConsumerHardwareCalifornia, US
Sophia Edelstein(Executive Officer, Director)inNathan Kondamuri(Executive Officer, Director)in
BoardRick Yang(Director)inAlex Gurevich(Director)in
Co-investorsAdvancit CapitalBaukunstblue 9 capitalBreak Trail VenturesEvolution VC PartnersJavelin Venture Partners+10 more
Pirouette develops OnePush, a fully automatic hidden-needle auto-injector platform paired with drug programs across chronic and rescue care indications.
Advanced ManufacturingBiotechHealthtechMedical DevicesBoston, US
Conor Cullinane(Founder)inMatthew Kane(Founder)inElijah Kapas(Founder)in
BoardPARINAZ MOTAMEDY(Director)inJOSEPH NEMMERS(Director)
Co-investorsY CombinatorGaingelsSafar Partners
Pirouette develops a disc-shaped, push-button auto-injector with a hidden needle and controlled insertion for at-home self-administration of injectable medicines, aimed at improving patient comfort and adherence for chronic therapies.
BiotechHealthtechMedical Devices
PNE Cycle operates a platform for producing battery materials, including battery-grade cathode active material (CAM) and Advanced Black Mass, using its patented LPAS recycling technology to recover critical minerals.
Circular EconomyCleantechNew Materials
Co-investorsWorldQuant Ventures
Lithium-ion battery direct recycling technology developer
Bordentown, US
Xiaofang Yang(Director)Chao Yan(Executive Officer, Director)Jerry Wang(Director)
Co-investorsTech Council VenturesSamsung Venture Investment Corporation
Quaise Energy develops ultra-deep geothermal drilling using gyrotron-powered millimeter-wave technology to reach depths up to 20 km and temperatures up to 500°C, aiming to build superhot geothermal power plants.
CleantechDeep TechEnergy
Co-investorsThe Engine Ventures
Quaise Energy develops superhot geothermal drilling technology using millimeter-wave powered drilling to access deep geothermal energy sources at unprecedented depths and temperatures for large-scale clean power generation globally.
CleantechDeep TechEnergyHouston, US
Carlos Araque(Executive Officer, Director)
BoardColleen Calhoun(Director)inVinod Khosla(Director)William Restrepo(Director)Frohman Anderson(Director)Mark Cupta(Director)in
Co-investorsCollaborative FundFine Structures VenturesPrelude VenturesTechEnergy VenturesXplorer Capital8090 Industries+5 more
Quidnet Energy develops geomechanical energy storage technology that repurposes existing oil, gas, and hydroelectric infrastructure to provide grid-scale, long-duration energy storage.
CleantechDeep TechEnergyHardwareHouston, US
Aaron Mandell(Executive Officer)Dagong Zhou(Executive Officer, Director)Howard Schmidt(Director)
BoardChristina Karapataki(Director)inMatthew Nordan(Director)Michael Biddle(Director)
Co-investorsClean Energy VentureCongruent VenturesNXT VenturesBreakthrough Energy VenturesClean Energy Ventures
San Jose, US
Roman Piszcz(Executive Officer, Director)Andrew Khor(Director)
BoardLoren Straub(Director)in
Co-investorsBowery Capital
Rain develops energy-efficient hardware for artificial intelligence workloads.
AI & Machine LearningHardwareSemiconductors
Co-investorsLoup VenturesMetaplanetOpen Field CapitalProsperity7 VenturesAsymmetry VenturesFoundersX Ventures+1 more
Rho offers a financial platform combining business banking, corporate cards, spend management, treasury, and accounting automation for companies from incorporation to over 10,000 employees.
Enterprise SoftwareFintechSaaSNew York, US
Co-investorsClaritas CapitalClocktower VenturesFlucas VenturesInspired CapitalRecall CapitalRed Swan Ventures+6 more
Runwise provides a wireless building control system that replaces traditional control infrastructure, which typically requires many devices, extensive wiring, and days of installation labor, with a single control installed wirelessly in a day or less.
CleantechIoTPropTech
Lee Hoffman(Founder)inMichael Cook(Founder)in
Co-investorsDERIVE VENTURESMassMutual VenturesMenlo VenturesMultiplier CapitalNextView VenturesNotation Capital+2 more
Reliable, flexible, and sustainable energy storage and generation
Sage Geosystems develops pressure geothermal technology to generate energy from the earth's subsurface heat, drawing on decades of experience drilling wells worldwide.
CleantechClimate TechDeep TechEnergyHouston, US
Cynthia Taff(Executive Officer, Director)Lev Ring(Executive Officer, Director)in
BoardWilliam Restrepo(Director)Clay Shamblin(Director)Staffan Qvist(Director)
Co-investorsCarbonCubit CapitalAll Aboard
Skillfully provides verified skills data for workforce decisions through performance-based work simulations rather than proxy measures.
Enterprise SoftwareHR Tech
Co-investorsBetter Ventures Central Llc
Space Forge develops in-space manufacturing capabilities, focusing on growing and processing advanced materials such as semiconductors in space and returning them to Earth.
Deep TechNew MaterialsSemiconductorsSpace TechCardiff, GB
Joshua Western(Founder)in
Co-investorsE2MC VenturesHelios CapitalStarbridge Venture Capital LlcTrousdale VenturesType One VenturesUnruly Capital+2 more
SPAN develops smart electrical panels that provide real-time home energy monitoring and control, enabling homeowners to track and optimize energy consumption at the room and appliance level to reduce energy bills.
CleantechHardwareIoT
Arch Rao(Founder & CEO)
Co-investorsAngeleno GroupArcTern VenturesCollaborative FundCongruent VenturesDesigner FundEarth Foundry+15 more
Satellite delivery to orbit at reduced cost using 100% reusable daily-flying rockets.
Co-investorsLa Famiglia
Stoke Space develops fully reusable rockets for space transportation and mobility services.
Advanced ManufacturingDeep TechHardwareSpace TechSeattle, US
Andy Lapsa(Founder)inTom Feldman(Founder)inKelly Hennig(Executive Officer)
BoardChristian Garcia(Director)inPhil Harris(Director)inMorgan Beller(Director)in
Co-investorsAcequia Capital (AceCap)Aurelia FoundryBalerion Space VenturesBeyond CapitalBeyond Earth VenturesCross Culture Ventures+27 more
Teamworks provides a unified software platform for sports organizations to acquire, coordinate, develop, and deploy athletic talent, covering functions like player communication and administration.
AI & Machine LearningSaaSSports Tech
Co-investorsAtlanta Tech VillageBlossom Street VenturesDuke Capital PartnersScOp Venture CapitalTeamworthy VenturesDragoneer Investment Group
Co-investorsHOF CapitalTYLT VenturesVerance Capital
Exits · 1
IPOs and acquisitions across the tracked portfolioGeneral FusionNASDAQ: GFUZ
Portfolio news
latest coverage across their companiesGeneral Fusion · investing.com · Aug 18, 2026
Machina Labs · businessinsider.com · Aug 17, 2026
Contraline · fiercebiotech.com · Aug 12, 2026
Boom · bfsi.economictimes.indiatimes.com · Jul 17, 2026
Astranis · thenextweb.com · Jul 16, 2026
Rho · startupintros.com · Jul 13, 2026
Stoke Space · techcrunch.com · Jul 8, 2026
Frequently asked questions
- How many investments has Helium-3 Ventures made?
- Helium-3 Ventures has 36 tracked investments.
- What stage does Helium-3 Ventures invest at?
- Helium-3 Ventures invests at the Seed, Series A, Series B stages.
- What sectors does Helium-3 Ventures focus on?
- Helium-3 Ventures focuses on AI & Machine Learning, Biotech, Circular Economy, Cleantech, Climate Tech, Deep Tech, E-commerce, EdTech, Energy, Fintech, Hardware, Healthtech, Robotics, SaaS, Space Tech.
- Where is Helium-3 Ventures located?
- Helium-3 Ventures is headquartered in New York, US.
- Does Helium-3 Ventures lead rounds?
- Helium-3 Ventures typically participates in rounds rather than leading them.
- Who does Helium-3 Ventures co-invest with?
- Helium-3 Ventures most often shares deals with Y Combinator, Evolution VC Partners, Collaborative Fund, among 230 tracked co-investors.
Images
Co-investors · 65
Andreessen Horowitz (a16z) is a venture capital firm founded in 2009 by Marc Andreessen and Ben Horowitz, known for pioneering the platform model with a large team of operators supporting founders across stages.
Liquid 2 is an early- and growth-stage venture capital firm that invests in founders across all sectors of technology, providing capital along with support from a network of operators.
UpHonest Capital is a Silicon Valley-based investment firm founded in 2017 that supports cross-border entrepreneurship and investment between China and the United States, and runs media, scout, and incubation programs.
Safar Partners is an early-stage technology investment firm that backs startups spun out of leading research universities, primarily MIT, Harvard, and the University of Rochester.
GV (Google Ventures) is a venture capital firm that has invested in artificial intelligence and machine learning since its early days, building a global portfolio of more than 100 AI companies across infrastructure, life sciences, and applications.
Craft Ventures is a venture capital firm founded and run by former founders and operators who partner with founders to help build and scale technology companies.
New Enterprise Associates (NEA) is a venture capital firm that invests in and provides long-term support to founders building new companies.
Sound Ventures is a venture capital firm that seeks to invest in the technology sector.
Norwest Venture Partners is an investment firm whose growth equity team backs private, profitable, fast-growing companies, providing capital and hands-on support through its 'invited guest' approach.
Streamlined Ventures is an early-stage venture firm that partners with founders and invests at the seed stage to help build large-scale companies.
Bling Capital is a seed-stage venture firm that backs entrepreneurs seeking to find and scale product-market fit, supported by its Bling Product Council of over 100 product leaders.
Lux Capital is a venture capital firm that backs founders building transformative deep technologies, having been among the first investors in category-defining companies across AI, robotics, biotech, defense, and infrastructure.
▶53 more co-investors
Sierra VenturesAltaIR CapitalInspired CapitalHOF CapitalJetstreamRefactor CapitalFifty YearsPrelude Ventures8090 IndustriesGreylock PartnersEverywhere VenturesKrakenDST GlobalUnion Square Ventures (USV)Plug and Play VenturesQuiet CapitalSOSVC2 InvestmentsLookout VenturesAmplify PartnersAbstract VenturesHack VCM13LightbankInitialized CapitalArray Ventures Management LlcCausal7percent VenturesSaga VenturesDraper Fisher Jurvetson (DFJ)TCVCoinFund2xNPolychain CapitalValar Ventures LlcAnorak VenturesBaruch Future VenturesAccelerator VenturesMMC VenturesHighbury HoldingsPresight CapitalSolana VenturesDivergenceImmeasurableLife BiosciencesPrimitive VenturesAmino CapitalSemantic VenturesDream MachineCloudflare, Inc.Trammell Venture Partners (TVP)Fox CorporationSeaX Ventures
Firms observed investing alongside Helium-3 Ventures, from public investor directories. Shared companies are the overlap with Helium-3 Ventures's recorded portfolio.
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