/Investor DB

Interface Fund — Full Portfolio

11 tracked investments · listed companies and verified rows first

21st21st.devin𝕏Seed

21st.dev provides a library of thousands of components and templates from the community for developers to use in building applications.

Developer ToolsEnterprise SoftwareSan Francisco, US

Serafim Korablev(CEO)inSergey Bunas(CTO)in

Co-investorsAloniqPioneers16TRAC (Third Round Analytics Capital)Transpose Platform ManagementY Combinator+8 more

Crusoecrusoe.aiin𝕏

Crusoe builds energy-first AI infrastructure, using innovative and renewable energy sources to power hyperscale AI factories and a cloud platform for AI workloads.

AI & Machine LearningCloud ComputingData & InfrastructureEnergyDenver, US

Cully Cavness(Founder)inChase Lochmiller(Founder)inCharles Cavness(Executive Officer, Director)Matthew DeNezza(Executive Officer)inJamey Seely(Executive Officer)inMichael Gordon(Executive Officer)in

Co-investorsAbstract VenturesACTIVATE CAPITAL PARTNERSAdvaita CapitalAir Street CapitalAkkaAlkeon Innovation+73 more

General Mattergeneralmatter.comin𝕏

General Matter develops nuclear energy technology focused on domestic U.S. energy production.

Climate TechDeep TechEnergy

Scott Nolan(Founder)inLee Robinson(Founder)inDrew DeWalt(Founder)

Co-investorsAntiCongruent VenturesCoral CapitalFounders FundIn-Q-TelLong Journey Ventures+2 more

Harmony Intelligenceharmonyintelligence.comin𝕏

Harmony Intelligence provides AI agents, managed by human security experts, that continuously test web apps, APIs, MCPs, and Chrome extensions for exploitable vulnerabilities.

AI & Machine LearningCybersecuritySaaS

Soroush J. Pour(Founder)in

Co-investorsAirTree VenturesFirst Row Partners

Jitterjitter.videoin𝕏Seed

Jitter is an AI-powered animation software that converts static designs into animated videos and assets.

AI & Machine LearningCreator EconomyDeveloper ToolsEnterprise SoftwareSaaSParis, FR

Etienne Albert(Founder)inSébastien Robaszkiewicz(Founder)in

Co-investorsMAGIC FundMotier VenturesNorte VenturesY CombinatorBetter AngleBonjour Ventures+6 more

Mergemergevr.comin𝕏Jan 2026

Merge Labs creates AR/VR learning tools for K-12 education, including the Merge Cube handheld interface and Merge EDU platform, enabling immersive hands-on STEM and science learning in classrooms and educational spaces.

AI & Machine LearningEdTechHardwareSan Antonio, US

Andrew Trickett(Founder)in

Co-investorsGeekdomNew Enterprise Associates (NEA)New Ground VenturesAccelAdditionBain Capital+2 more

Mergemerge.devin𝕏Jan 2026

Merge provides a unified API and integration infrastructure that lets software companies connect their products to hundreds of third-party systems (HRIS, accounting, ticketing, file storage, CRM) and deploy AI agents that take authenticated actions across enterprise tools.

AI & Machine LearningData & InfrastructureDeveloper Tools

Gil Feig(Founder)inShensi Ding(Founder)in

Co-investors20VCAccelNew Enterprise Associates (NEA)AdditionBain CapitalBain Capital Ventures+1 more

Merge Labsmerge.io𝕏Jan 2026

Merge Labs is a research lab developing brain-computer interfaces that connect with neurons using molecules instead of electrodes and non-invasive modalities like ultrasound, integrated with AI.

AI & Machine LearningBiotechDeep TechSan Antonio, US

Andrew Trickett(Executive Officer, Director)Franklin Lyons(Executive Officer, Director)

BoardLew Moorman(Director)in

Co-investorsAntiBig Brain HoldingsSaga VenturesSciFi VCStarship VenturesTransform Investments+4 more

Motif Neurotechmotifneuro.techin𝕏Jan 2024

Motif Neurotech develops a therapeutic brain-computer interface using minimally invasive neuromodulation to treat difficult-to-treat mental health conditions such as depression.

BiotechDeep TechDigital HealthHealthtechMedical DevicesHouston, US

Sameer Sheth(Founder)inSunil Sheth(Founder)Nick Halper(Chief Operating Officer)inSteve Goetz(Chief Technology Officer)inAnthony Arnold(Director)inKaiyuan Yang(Founder)

Co-investorsArboretum VenturesDivergent CapitalDolby Family VenturesFeatures Capital HoldingsPsyMed VenturesTMC Venture Fund+6 more

Parahelpparahelp.comin𝕏Seed

Parahelp builds an AI-powered customer support agent that can be configured to integrate with external tools and APIs to resolve support tickets autonomously.

AI & Machine LearningEnterprise SoftwareSaaSSan Francisco, US

Anker Ryhl(CEO)inMads Liechti(Founder)inAnker Bach Ryhl(Founder)inMads Lunau Liechti(Founder)inEmil Olsen(Operations)Henrik Aalto(Founding Engineer)

Co-investorsbyFoundersOrange CollectiveSkyfall VenturesY CombinatorAlt Capitalf7 Ventures+9 more

Other

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

Science Corp

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.