Operating Systems Investors

Angel Roster lists 50 investors who back Operating Systems companies. Most are venture capital firms and angel investors, the most common stage is Seed and the largest groups are based in the United States, Belgium and Greece.

Investors listed
50
With verified email
46%
Most common stage
Seed
Top location
United States

Updated October 13, 2026 · How we compile this data

Top 40 Operating Systems investors

The most complete profiles first. Showing 40 of 50.

  • Alex MacCawVerified

    Venture Capital, Founder, Angel/Individual · United States

    SeedPre-SeedHealth CareData IntegrationDatabasesEnterprise Software

    Portfolio: Anytype, Almanac, Tamber, Letter and 6 more

    Verified email available

  • David BeyerVerified

    Venture Capital, Entrepreneurship Program, Private Equity Firm · United States

    SeedAdvertisingHealth CareData IntegrationTelecommunications

    Portfolio: Modria, AppNeta, True Co, Casetext and 47 more

    Verified email available

  • Don RaineyVerified

    Venture Capital, Investor · United States

    SeedData IntegrationTelecommunicationsE-commerceCybersecurity

    Portfolio: XOi Technologies, Clarabridge, Payzer, Personal.com and 16 more

    Contact details available

  • Jag SinghVerified

    Venture Capital, Private Equity Firm, Angel/Individual · Germany

    SeedEarly Stage VentureCryptocurrencySoftwareProductivity SoftwareOperating Systems

    Portfolio: yoona.ai, FLYT, Zazu Africa, Stashbee and 13 more

    Verified email available

  • Jeremy YapVerified

    Angel/Individual · United States

    SeedE-commerceSemantic SearchDatabasesComputer Vision

    Portfolio: Digime, Serial Box, Breakroom, Fabric and 22 more

    Verified email available

  • Jett McCandlessVerified

    Venture Capital, Angel/Individual, Investor · United States

    SeedPre-SeedEnterprise SoftwareTransportationAndroidAutomotive

    Portfolio: TruckMap, Leverage, Baton, Onward and 7 more

    Verified email available

  • Josh ElmanVerified

    Angel/Individual, Investment Partner · United States

    SeedPre-SeedAdvertisingLocal CommerceHealth CareE-commerce

    Portfolio: Hangtime, Discord, Koji, Jelly HQ and 23 more

    Verified email available

  • Bob NolanVerified

    Venture Capital · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Verified email available

  • David CreminVerified

    Venture Capital, Private Equity Firm, Micro VC · United States

    Health CareWellnessWomen FoundedHR Tech

    Portfolio: LoopLabs, Notion, Occipital, Lucid Sight and 57 more

    Verified email available

  • David RobertsVerified

    Venture Capital · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Contact details available

  • Ernst Theodor SackVerified

    Venture Capital, Private Equity Firm · United States

    TelecommunicationsAutonomous VehiclesCybersecurityComputer Vision

    Portfolio: Voyager Portal, FreeWire Technologies, Shoreline, Mission Secure and 12 more

    Verified email available

  • Frank FosterVerified

    Venture Capital, Private Equity Firm, Micro VC · United States

    Health CareWellnessWomen FoundedHR Tech

    Portfolio: LoopLabs, Notion, Occipital, Lucid Sight and 57 more

    Verified email available

  • Gokul RajaramVerified

    Angel/Individual

    AdvertisingE-commercePaymentsEnterprise Software

    Portfolio: I Done This, Moesif, Squad, Lolli and 71 more

    Verified email available

  • Kevin LeonardVerified

    Venture Capital, Private Equity Firm, Micro VC · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Verified email available

  • Matthias VandepitteVerified

    Venture Capital · United States

    Health CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 16 more

    Verified email available

  • Robert MacInnisVerified

    Venture Capital · United States

    TelecommunicationsAutonomous VehiclesCybersecurityComputer Vision

    Portfolio: Voyager Portal, FreeWire Technologies, Shoreline, Mission Secure and 12 more

    Verified email available

  • Robert MetzgerVerified

    Venture Capital · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Verified email available

  • Ted SaundersVerified

    Venture Capital · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Verified email available

  • Alex Smout

    Venture Capital, Investor · Denmark

    Series BAutonomous VehiclesE-commerceLeisureWomen Founded

    Portfolio: Digital Motors, Circulor, SPLT (Splitting Fares), LGN and 16 more

    Contact details available

  • Daniel Hanks

    Venture Capital, Private Equity Firm, Micro VC · United States

    SeedTelecommunicationsE-commerceCybersecurityComputer Vision

    Portfolio: Native, Avizia, Sayari Labs, CesiumAstro and 6 more

    Contact details available

  • Filip Van Innis

    Venture Capital, Investor · Belgium

    SeedHealth CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 19 more

    Contact details available

  • Julia Taxin

    Venture Capital, Private Equity Firm, Investor · United States

    SeedData IntegrationTelecommunicationsE-commerceCybersecurity

    Portfolio: Ryft Systems Inc., Contactually, Tethr, Cerebro Capital and 58 more

    Contact details available

  • Lawson DeVries

    Venture Capital, Private Equity Firm, Investor · United States

    SeedData IntegrationTelecommunicationsE-commerceCybersecurity

    Portfolio: Ryft Systems Inc., Contactually, Tethr, Cerebro Capital and 61 more

    Contact details available

  • Sebastian Peck

    Venture Capital, Private Equity Firm, Investor · Netherlands

    SeedAutonomous VehiclesE-commerceDeepTechLeisure

    Portfolio: Digital Motors, Circulor, Findable, SPLT (Splitting Fares) and 20 more

    Contact details available

  • Steve Fredrick

    Venture Capital, Private Equity Firm, Investor · United States

    SeedData IntegrationTelecommunicationsE-commerceCybersecurity

    Portfolio: Ryft Systems Inc., Contactually, Tethr, Cerebro Capital and 62 more

    Contact details available

  • Ali SinaVerified

    Angel/Individual · United States

    Brand DevelopmentDigital StorytellingDeepTechDigital Media

    Portfolio: MOOVROOM, Monster Solar, INSOLAR, Rise Capital and 3 more

    Verified email available

  • Aristos Doxiadis

    Micro VC · Greece

    E-commerceTransportationMusicEducation

    Portfolio: incrediblue, Tribe Wearables, Dopios, Workable and 25 more

    Contact details available

  • Arnaud De Vos

    Venture Capital · United States

    Health CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 16 more

    Contact details available

  • Carolin Funk, Ph.D.

    Venture Capital, Private Equity Firm · United States

    TelecommunicationsAutonomous VehiclesCybersecurityComputer Vision

    Portfolio: Voyager Portal, FreeWire Technologies, Shoreline, Mission Secure and 12 more

    Contact details available

  • Constantine Pateras

    Micro VC · Greece

    E-commerceTransportationMusicEducation

    Portfolio: incrediblue, Tribe Wearables, Dopios, Workable and 25 more

    Contact details available

  • Duco Sickinghe

    Venture Capital · United States

    Health CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 16 more

    Contact details available

  • Eddie Brinson

    Venture Capital · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Contact details available

  • Emilie Hannezo

    Venture Capital · United Kingdom

    Autonomous VehiclesE-commerceLeisureWomen Founded

    Portfolio: Digital Motors, Circulor, SPLT (Splitting Fares), LGN and 15 more

    Contact details available

  • Liz Haerling

    Venture Capital, Private Equity Firm, Micro VC · United States

    TelecommunicationsE-commerceAccountingCustomer Service

    Portfolio: Katapult, Deko, Tethr, Bridge Financial Technology and 24 more

    Contact details available

  • Meghan Pfeifer

    Venture Capital, Private Equity Firm · United States

    Data IntegrationTelecommunicationsE-commerceCybersecurity

    Portfolio: Ryft Systems Inc., Contactually, Tethr, Cerebro Capital and 58 more

    Contact details available

  • Steven De Troyer

    Venture Capital · United States

    Health CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 16 more

    Contact details available

  • Toon Smets

    Venture Capital, Private Equity Firm, Finance Operator · Belgium

    Health CareData IntegrationAccountingCybersecurity

    Portfolio: Cabovisão, MobileXpense, Riaktr (formely Real Impact Analytics), Melita Plc and 16 more

    Contact details available

  • Frank MillerVerified

    Angel/Individual · United States

    DatabasesEnterprise SoftwareMobileOperating Systems

    Portfolio: Sickweather, Mattermark, Pagedip formerly Beneath the Ink, Brewbot and 1 more

    Verified email available

  • Kent JohnsonVerified

    Angel/Individual, CEO · United States

    SeedEnterprise SoftwareInvestment ManagementSoftware EngineeringArtificial Intelligence (AI)

    Portfolio: DIMENSIONALMECHANICS

    Verified email available

  • Matt Hersh

    Venture Capital, Private Equity Firm, Finance Operator · United States

    SeedSeries AHealth CareE-commercePaymentsCybersecurity

    Portfolio: Brock Enterprises, Surf Air, Iteratively, Jetblue

    Contact details available

See all 50 Operating Systems investors

Search, filter and unlock verified emails and LinkedIn profiles. Free to browse.

By investment stage

By location

Related industries

Most-backed portfolio companies

Frequently asked questions

How many Operating Systems investors are on Angel Roster?

Angel Roster lists 50 Operating Systems investors. 23 of them (46%) include a verified email address.

What types of investors are they?

The most common investor types are Venture Capital Firms (32), Angel Investors (20) and Private Equity Firms (16). An investor can have more than one type, for example an angel who is also a venture partner.

Which stages do Operating Systems investors invest in?

Among those that list a stage, the most common are Seed (19), Pre-Seed (4) and Early Stage Venture (1).

Where are Operating Systems investors based?

Most are based in the United States (39), Belgium (2) and Greece (2).

Which companies have Operating Systems investors backed?

The most-backed portfolio companies among them are Apkudo (12), Tethr (11), Sayari Labs (8), Venminder (7) and CloudMine (7).

How do I contact Operating Systems investors?

Create a free Angel Roster account to search and filter all 50, then unlock verified emails and LinkedIn profiles on a paid plan. Every plan starts with a 3-day free trial.