Fourth Realm
Venture capitalActively deployingMenlo Park Β· 1 people tracked
Investment thesis
Fourth Realm targets founders with intense founder-problem fit, characterized by alignment between a founder's core competencies and their company's critical needs. The firm believes these founders execute with urgent determination and exceptional capability. The fund aims to identify innovative opportunities that traditional venture investors dismiss through rigid thinking and pattern-matching, supporting breakthroughs across diverse innovation timelines.
Source: firm website, verified Aug 6, 2026.
Team Β· 1 people
from public directoriesWhat they invest in
from 25 of 40 portfolio companiesEnterprise Software Γ9SaaS Γ9AI & Machine Learning Γ8Fintech Γ4Future of Work Γ4Healthtech Γ4Cybersecurity Γ3Data & Infrastructure Γ3
HQs:United StatesΓ16PhilippinesΓ1
Investments Β· 40 tracked
founders shown can be your intro pathSecuring the world's data
Palo Alto, US
Bipul Sinha(Co-Founder, Chairman & Chief Executive Officer)Arvind Nithrakashyap(Co-Founder, Chief Technology Officer & Director)Arvind Jain(Co-Founder (former; departed to found Glean))Soham Mazumdar(Co-Founder (former))Kiran Choudary(Chief Financial Officer)Jesse Green(Chief Revenue Officer)
Co-investorsAnicut CapitalBain Capital VenturesChamaeleonEngineering CapitalEQUIAMEvolution VC Partners+14 more
Avion School is a coding bootcamp that teaches web development skills to beginners and career-switchers, offering programs in JavaScript and Ruby with job placement support for graduates.
EdTechManila, PH
John Young(Founder)in
Co-investorsY Combinator
Barn2Door provides software and services for farmers to sell their products online and in person, automating orders, payments, inventory, email campaigns, and delivery logistics.
AgTechE-commerceFoodTechSaaSSeattle, US
JANELLE MAIOCCO(Executive Officer, Director)JAMES MAIOCCO(Executive Officer, Director)
BoardDUNCAN DAVIDSON(Director)inKATHY CHILL(Director)
Co-investorsBullpen CapitalConductor CapitalSocial StartsDecathlon Capital PartnersGlobal Founders CapitalLead Edge Capital+1 more
Co-investorsWXR Fund
Bogota
Jose Jair Bonilla(Executive Officer, Director)inOscar Sarria(Founder)inSimon Borrero(Director)
Co-investorsAlter GlobalFEMSA VenturesFlucas VenturesInQlabKube VCMONASHEES+5 more
Team82 is a cybersecurity vulnerability and threat research team that identifies software and firmware vulnerabilities in cyber-physical systems.
AI & Machine LearningCybersecurityIoT
Galina Antova(Founder)inYaniv Vardiin
BoardDavid Millstone(co-CEO of Standard Industries and co-CIO of Standard Investments)
Co-investorsArcher Capital GroupArcher Venture CapitalB CapitalBessemer Venture PartnersBMW i VenturesBosch Ventures+15 more
Cohesity provides cyber resilience software that helps organizations identify and protect the minimal critical datasets and systems needed to restart operations after ransomware attacks or disasters.
Cloud ComputingCybersecurityData & InfrastructureEnterprise SoftwareSan Jose, US
MOHIT ARON(Executive Officer, Director)Mohit Aron(Founder)inSanjay Poonen(CEO & President)TIMOTHY ROBBINS(Executive Officer)LORENZO MONTESI(Executive Officer)ROB SALMON(Executive Officer)
Co-investorsAccelAdit Ventures Management, LlcArtis VenturesBattery VenturesFoundation CapitalFounders Circle Capital+18 more
Emulate develops Organ-Chip technology, including 30+ organ models such as liver, brain, and other human tissue chips, used for human-based preclinical drug safety and toxicity testing.
BiotechDeep TechHealthtech
Co-investors+ND CapitalAlwyn CapitalStray Dog CapitalOS FundStarlight Ventures
Enable Us provides buyer enablement capabilities that allow customers to view tailored content and get answers.
Enterprise SoftwareSaaS
Co-investorsFresco Capital
Expedock builds dedicated remote outsourcing teams, supported by Operations Managers and QA specialists, that handle back-office workflows such as freight operations, documentation, billing, data annotation, RLHF, model evaluation, and healthcare administration.
AI & Machine LearningFuture of WorkLogistics & Supply Chain
Jeff Tan(Founder)in
Co-investorsDorm RoomInsight PartnersKickstart VenturesWebb Investment NetworkFoxmont Capital Partners
Fieldguide provides automated workflows and collaborative tools for assurance and advisory practices to serve clients more effectively.
AI & Machine LearningEnterprise SoftwareFuture of WorkSaaSSan Francisco, US
Jin Chang(Founder)inChris Szymansky(CTO / Co-Founder)in
Co-investors8VCBessemer Venture PartnersFloodgateGeodesic CapitalPoint72 VenturesY Combinator
Gr4vy provides a cloud-based payment orchestration platform that enables merchants and payment platforms to manage their payment strategies without coding.
Enterprise SoftwareFintechSaaS
John Lunn(CEO & Founder)Ali Minaei(Co-founder & CTO)Cristiano BettaOlga Tish(CFO)Zubin Vandrevala
Co-investorsActivant CapitalFirestartrMarch Capital PartnersNycaNyca Partners
Great Expectations provides a data quality and governance platform that enables teams to define, test, and monitor data expectations across their data systems with automation and collaborative tools.
Data & InfrastructureDeveloper ToolsEnterprise Software
Co-investorsCRV (Charles River Ventures)SAV (Scale Asia Ventures)Zero Prime VenturesMedMountain Ventures
Kahoona provides AI-based anonymous user intelligence that analyzes website visitors' behaviors in-session to build predictive segments and high-value profiles from first-party data.
AI & Machine LearningData & InfrastructureMarketing Tech
Co-investors91 Ventures
Varda industrializes low Earth orbit by manufacturing pharmaceuticals and other specialized products in space, then returning them to Earth via reusable reentry capsules.
BiotechDeep TechSpace TechEl Segundo, US
Will Bruey(Founder)inDelian Asparouhov(Founder)in
Co-investorsAlso CapitalCaffeinated CapitalFounders FundKhosla VenturesLux CapitalGeneral Catalyst+25 more
Co-investorsInterplay Ventures Early Stage Management LlcKapor Capital
Overfit combines human coaching for accountability with AI-generated personalized workout plans for fitness users seeking guidance and customized exercise routines.
AI & Machine LearningHealthtechWellness & FitnessSan Francisco, US
Ajay Saini(Founder)inVahid Fazel-Rezai(Founder)in
Co-investorsY Combinator
Pahdo Labs is building an online multiplayer game designed as a persistent, shared virtual world where players create, own, and share content and pursue long-term mastery.
ConsumerGamingMedia & EntertainmentNew York, US
Co-investorsAndreessen HorowitzBoxGroupGlobal Founders CapitalScott SunartoLong Journey Ventures
Perl Street provides financial infrastructure and software for renewable energy investors and developers to manage capital deployment, compliance, and operations related to clean energy projects, particularly those funded through the Greenhouse Gas Reduction Fund.
B2B MarketplacesCleantechClimate TechFintechSaaSAustin, US
Tooraj Arvajeh(Founder)in
Co-investorsGarage CapitalKeiki CapitalMS&AD VenturesY CombinatorClimate CapitalThird Sphere
Quadrant Eye develops at-home diagnostic technology to conduct comprehensive eye examinations.
AI & Machine LearningHealthtechMedical DevicesSan Francisco, US
Quinn Wang(Founder)inKristine Hara(Founder)
Co-investorsY Combinator
Quo is a cloud-based business communication platform that provides a modern phone system for small businesses to connect with customers and manage relationships.
Cloud ComputingEnterprise SoftwareFuture of WorkSaaSSan Francisco, US
Mahyar Raissi(Founder/CEO)inDaryna Kulya(Founder)inThomas Andrew DeLong(Executive Officer)Naman Desai(Executive Officer)Todd Goldstein(Director, Promoter)Amit Patel(Executive Officer, Director, Promoter)
Co-investorsChapter OneCraft VenturesGarage CapitalKindred VenturesVisary CapitalY Combinator
Reality Defender provides real-time detection of AI-generated and manipulated media (deepfakes) across calls, video meetings, access workflows, and executive communications, offered via API and SDKs.
AI & Machine LearningCybersecurityEnterprise Software
Co-investorsBantam GroupSLVCArgon VenturesDCVC (Data Collective)
Sirona Medical builds RadOS, a cloud-native platform that reimagines radiology practice in the AI age for physicians and radiology practices.
AI & Machine LearningDigital HealthHealthtechSan Francisco, US
Cameron Andrews(Founder & President)Ankit Goyal(Executive Officer, Director)
BoardFrancisco Gimenez(Director)in
Co-investors8VCGreatPoint VenturesRose Park AdvisorsGlobal Founders CapitalXfund
Revolutionizing space technology to make life multi-planetary
Hawthorne, US
Elon Musk(Founder & CEO)in
Co-investors1/1 Capital137 Ventures4DX VenturesA*Abstract VenturesAccess Technology Ventures+108 more
Stoke Space develops Nova, a fully and rapidly reusable rocket, along with a reusable upper-stage vehicle for on-demand access to orbit and in-space operations such as asset capture, repositioning, and cargo logistics.
Deep TechHardwareSpace Tech
Co-investorsIndustrious Ventures
Stripe provides financial infrastructure for businesses to accept payments, offer financial services, and implement custom revenue models across international markets in 135+ currencies.
FintechSaaSSan Francisco, US
John Collison(Founder/President)inPatrick Collison(Founder/CEO)inWilliam Gaybrick(Executive Officer)
BoardMichael Moritz(Director)in
Co-investorsAglae VenturesAir Street CapitalAlkeon InnovationAndreessen HorowitzBase PartnersBoxGroup+54 more
TalkShop.live is a live shopping platform where users watch live video streams and buy featured products directly during the broadcast, using its patented shoppable embedded point-of-sale technology.
E-commerceMedia & EntertainmentRetail Tech
Co-investorsFlucas VenturesProgress VenturesSpero Ventures
Text Blaze is a productivity tool that creates text snippets and templates to reduce repetitive typing across web applications.
Developer ToolsEnterprise SoftwareFuture of WorkSaaSSan Francisco, US
Dan Barak(Founder)inScott Fortmann-Roe(Founder)inDan B
Co-investorsY CombinatorSusa VenturesTwo Sigma Ventures
Tilled provides payment facilitation services delivered as a software-as-a-service platform, enabling software companies to embed payment processing capabilities, monitor merchant transactions, and generate revenue from payments across the U.S. and Canada.
Enterprise SoftwareFintechSaaSBoulder, US
Caleb Avery(Executive Officer, Director)John Allen(Executive Officer, Director)
BoardBen Capell(Director)Rebecca Lynn(Director)inAbhinav Tiwari(Director)John Wallington(Director)
Co-investorsBootstrap Venture PartnersCanvas VenturesClocktower VenturesG SquaredTRAC (Third Round Analytics Capital)Blank Ventures
Venice, US
Paul Eremenko(Executive Officer, Director)
Co-investorsTrucks VCAirbus VenturesSojitzToyota Ventures
A Vietnamese-language football streaming site offering live match links, schedules, scores, standings, highlights and sports news for leagues such as the Premier League, Champions League and V-League.
ConsumerMedia & Entertainment
Co-investorsBling Capital
Exits Β· 2
IPOs and acquisitions across the tracked portfolioPortfolio news
latest coverage across their companiesSpaceX Β· businessinsider.com Β· Aug 16, 2026

Stripe Β· techcrunch.com Β· Jul 20, 2026
Pahdo Labs Β· thedesignlab.blog Β· Feb 6, 2026
Fieldguide Β· internationalaccountingbulletin.com Β· Feb 3, 2026
Sirona Medical Β· medicaldevice-network.com Β· Oct 31, 2025
Quo (fka OpenPhone) Β· quo.com Β· Sep 23, 2025
Cohesity Β· cohesity.com Β· Jul 27, 2025
Frequently asked questions
- Where is Fourth Realm located?
- Fourth Realm is headquartered in Menlo Park, US.












