/Investor DB

Sum Ventures — Full Portfolio

8 tracked investments · listed companies and verified rows first

Automotusautomotus.aiin𝕏

Automotus uses computer vision and AI to help cities and airports manage commercial vehicle traffic and reduce CO2 emissions.

AI & Machine LearningClimate TechGovTechMobility & TransportationSaaSLos Angeles, US

Harris Lummus(Executive Officer, Director)Jordan Justus(Founder)inHarris Lummis(Founder)in

BoardOliver Libby(Director)Tom Spengler(Director)Gabe Klein(Director)in

Co-investorsBand of AngelsE8 AngelsEmerging VenturesIrishAngelsKeiki CapitalPartnership Fund for NYC+6 more

GoBuild (fka Brick)go.build𝕏SeedDefunct

GoBuild provides payment and working capital solutions designed for small construction firms, addressing cash flow delays through deposit financing, project-based lending, and subcontractor payment management.

FintechPropTechSan Francisco, US

Chapman Snowden(Founder)inDrew Barrett(Founder)inAdrian Calderon(CTO)Tiffany Testa(Chief Of Staff)

Co-investorsCapmontFlourish VenturesTrihill CapitalY CombinatorGlobal Founders CapitalGoodwater Capital+7 more

Grapefruit Healthgrapefruit.healthinAug 2022

Grapefruit Health provides healthcare organizations with a workforce of trained clinical students—recruited from pre-med, nursing, pharmacy, social work, and similar programs—who are integrated into care team workflows to close care gaps and address staffing shortages.

Digital HealthFuture of WorkHealthtechSaaSChicago, US

Eric Alvarez(Executive Officer, Director)in

Co-investorsAntlerChicago Early Growth Ventures (CEGV)Everywhere VenturesGoAhead VenturesLitquidity VenturesLongJump Ventures+2 more

Irrigreenirrigreen.comin𝕏Apr 2025 · $19M

Irrigreen manufactures smart in-ground sprinkler systems for residential lawns that use mapping technology to reduce water waste by up to 50% compared to traditional irrigation.

AgTechHardwareIoT

Co-investorsBerkeley Angel NetworkBURNT ISLAND VENTURESEcho River CapitalMFV PartnersSand Hill AngelsStartX+3 more

Pippin / Rent the Backyardrentthebackyard.comin𝕏SeedDefunct

Rent a Backyard connects homeowners with prefab home builders and designers to add accessory dwelling units, mother-in-law suites, and other backyard structures to properties.

B2B MarketplacesConstruction TechMarketplacesPropTechSan Francisco, US

Brian Bakerman(Founder)inSpencer Burleigh(Founder)inGeorgia Kate(Operations Associate)Angeli Dimakiling(Recruiter)

Co-investorsK2 GlobalY CombinatorZillionizeAsymmetry VenturesCleo CapitalGreat Wave Ventures+4 more

Plantswitchplantswitch.comin

PlantSwitch manufactures home-compostable food packaging and cutlery products from agricultural waste, particularly rice hulls, using a proprietary CompostZero™ bio-resin that breaks down in backyard compost without leaving microplastics.

Circular EconomyFoodTechNew MaterialsSanford, US

MAXIME BLANDIN(Executive Officer, Director)DILLON BAXTER(Executive Officer, Director)in

BoardSamuel Phelps(Director)

Co-investorsFlow Capital

Transparency Analyticstransparency-analytics.cominJan 2026

Transparency Analytics provides quantitatively driven credit ratings for corporate issuers and private credit transactions.

FintechNew York, US

Christopher Tolles(CFO)Michael Brawer(CEO)inRobert Boresta(Executive Officer)

BoardMichael Fedorochko(Director)Christopher Gottschalk(Director)in

Co-investorsCore Venture CapitalDeciensFJ LabsMouro CapitalAllianz Life VenturesCore Innovation Capital

Other

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

FantasyLife

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.