/Investor DB

Nebular — Full Portfolio

14 tracked investments · listed companies and verified rows first

Efferenceefference.aiin𝕏✓ verified

Efference builds robotic-grade perception and compute hardware and devices for distributed data collection and real-time inference, serving robotics companies and applications at scale.

Advanced ManufacturingAI & Machine LearningHardwareRoboticsSan Francisco, US

Gianluca Bencomo(CEO)in

Co-investors500 GlobalAntiY Combinator

Tachyontachyonindustrial.comin𝕏✓ verified

Tachyon develops particle accelerator technology and infrastructure at the frontier of applied physics.

Deep TechHardwareSpace TechRedwood City, US

Ian BlumenfeldinNiv LevyinBjorn Manuel Hegelichin

BoardFinn Murphyin

Co-investorsCocoaForewordGenius VenturesUncommonScribble VenturesAndreessen Horowitz

Amperosamperos.comin𝕏Apr 2026 · $16M

Amperos automates and manages insurance claim recovery for healthcare providers, reducing denials and processing backlogs through a combination of automation and expert oversight.

AI & Machine LearningEnterprise SoftwareHealthtechNew York, US

Michal Miernowski(Founder)inWilson Wang(Founder)inAlvin Wu(Founder)in

Co-investorsBessemer Venture PartnersNeoNeoUncork Capital

Crewline AIcrewline.aiinApr 2026

Crewline sells a retrofit autonomy kit that converts existing construction machines—starting with vibratory drum rollers, with dozers, rock trucks and excavators in development—into self-driving equipment backed by remote operators and 24/7 monitoring.

AI & Machine LearningConstruction TechRoboticsLondon, GB

Frederik Filz-Reiterdank(CEO)inMohamed Sadek(CTO)in

Co-investorsBegin CapitalEntrepreneur FirstInitialized CapitalTranspose Platform ManagementCocoaFord Street Ventures

Exosatexosat.comin𝕏Seed

Exosat designs and builds low-Earth-orbit satellite constellations for sovereign operators, offering direct-to-cell, IoT, and broadband connectivity.

Advanced ManufacturingAI & Machine LearningHardwareIoTSpace TechSingapore, SG

Edward Ge(CEO)in

Co-investorsRedbud Trail GroupTranspose Platform ManagementY CombinatorZero Index007 Venture Partners57O Investments+33 more

Frontier Computingfrontier.siteSeed

Frontier Computing grows lab-cultured biological neural networks at large scale to serve as a training substrate for machine learning, colocating memory and compute to support training of large-parameter models.

Advanced ManufacturingAI & Machine LearningHardwareLondon, GB

Michael Domarkas(CEO)in

Co-investorsLocalGlobePioneerWSSY CombinatorAcephale VenturesAmino Collective+18 more

Icarusicarus.oneinSep 2025 · $6.1M

Icarus designs and manufactures solar-powered autonomous aircraft that fly for months at the edge of space.

Advanced ManufacturingDeep TechDefense TechHardwareSpace TechLos Angeles, US

Henry Kwan(Founder)inCameron HargisinZach 'Jerry' WilliamsinHenry K.(CEO)

Co-investorsACADEMY INVESTORAIN VenturesEntrepreneurs Roundtable Accelerator (ERA)HAWKTAILPioneerPredictive VC+24 more

Oratomicoratomic.comJul 2026

Oratomic builds fault-tolerant quantum computers using ultra-efficient error correction with light and atoms.

AI & Machine LearningDeep TechQuantum Computing

Dolev Bluvstein(Founder)inMadelyn CaininManuel Endres(Founder)

BoardJohn Preskill

Co-investorsBain Capital VenturesGeneral CatalystIndex VenturesKhosla VenturesSpark CapitalARCH Venture Partners+3 more

Project Elevenprojecteleven.comJan 2026 · $20M

Project Eleven builds post-quantum cryptography and migration tooling for Bitcoin, Ethereum and other digital asset networks.

Co-investorsCastle Island VenturesCoinbase VenturesFin CapitalLattice CapitalQuantonationVariant Fund+1 more

Salesformsalesform.comSeed

Salesform automates the qualification and routing of inbound leads while integrating with a company's existing sales tools, using lead enrichment data to improve response and demo-booking processes.

Enterprise SoftwareSales TechNew York City, US

Uday Singh(Founder)Kwasi Oppong-BaduMichael MacKayTom Rutten(Engineer)

Co-investorsGeek VenturesY CombinatorAnamcaraCraft VenturesForewordNomad Capital VC+4 more

Seamflowseamflow.cominFeb 2026 · $4.5M

Seamflow builds AI software for the testing, inspection, and certification (TIC) industry, automating certification processes for certification companies.

AI & Machine LearningEnterprise SoftwareLegalTechSaaSLondon, GB

Konstantin Klingler(CEO)inYusufhan Kırçova(CTO)inYusufhan Kircova(Founder)in

Co-investorsEntrepreneur FirstInitialized CapitalNorthzoneTranspose Platform ManagementCharlie SonghurstTreeo VC

Starcloudstarcloud.comin𝕏Seed · Dec 2024

Starcloud is a deep-tech company building large-scale data center infrastructure designed to operate in space.

Advanced ManufacturingAI & Machine LearningClimate TechCloud ComputingData & InfrastructureDeep TechSemiconductorsSpace TechRedmond, US

Philip Johnston(CEO)inEzra Feilden(CTO)inAdi Oltean(Founder)inPaul Adrian Oltean(Executive Officer, Director)Philip Johnston Ezra Feilden(Founder)

BoardMorgan Beller(Director)in

Co-investorsAb Capital Holding BVAmbush CapitalCisco InvestmentsDnx VenturesDragon CapitalFUSE+60 more

Tekton Dynamicstekton-dynamics.comin𝕏Seed

Tekton Dynamics develops AI and robotics software to automate manufacturing tasks that are hazardous, repetitive, or undesirable for human workers.

Advanced ManufacturingAI & Machine LearningRoboticsLondon, GB

Max Ahrens(CEO)inEduardo Candela(CTO)

Co-investorsPioneerSciFi VCUrban InnovationY Combinator2100 VenturesAccel+8 more

Other

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

Onos Health

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.