Fundraising Fox

645 Ventures

Venture capital

New York · Pre-Seed–Series B · 23 people tracked

Also known as 645 VENTURES MANAGEMENT, LLC

Find your way into 645 Ventures

5,720 people in our graph share verified history with the 645 Ventures team — schools, employers, funds. One of them is your warm intro.

Adam Valkinunlockedknows Parul Singh · together at Harvard University (overlapped)
×4knows the team · via Goldman Sachs
knows the team · via Harvard Business School
knows the team · via Harvard University
knows the team · via Deerfield Academy
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Investment thesis

645 Ventures invests in exceptional founders at the earliest stages, seeking companies that are pre-product, pre-revenue, and pre-consensus. The firm evaluates founders against four traits: purity of motivation (authentic drive to solve a problem), an earned secret (non-obvious market insight from deep expertise or contrarian research), obsessive problem-solving focus, and non-consensus thinking. Beyond capital, the firm actively supports portfolio companies through go-to-market strategy, fundraising guidance, valuation and term negotiation help, and connecting founders with advisors, distribution partners, and other key stakeholders. It concentrates on several areas of deep domain experience across the technology landscape.

Source: firm website, verified Sep 15, 2026.

Stage
Pre-Seed–Series B
Check
$1M – $5M
HQ
New York, New York, US
Leads rounds
Leads
Instruments
Equity
Founded
2013
Last 12 months
10 investments
AUM
$550M
VC funds
5
Tracked investments
154

Team · 23 people

from the firm's website & curated & public directories
Michael Liu· Associate

Founder mafia

3 people who came through 645 Ventures went on to found or lead other companies.

What they invest in

from 76 of 154 portfolio companies

SaaS ×40AI & Machine Learning ×36Enterprise Software ×29Fintech ×14Consumer ×9Cybersecurity ×8Data & Infrastructure ×8Healthtech ×8

HQs:United States×56United Arab Emirates×1Canada×1Switzerland×1Denmark×1United Kingdom×1

Who they back

founder profiles across 34 portfolio companies
29%
solo founders
10 of 34 mapped founding teams
42%
repeat founders
of 62 founders with career history
~4 yrs
old at investment
median across 13 dated deals

Founding team size:solo founder×102 founders×113 founders×84+ founders×5

Where their founders studiedfrom 59 founders with education data

Princeton University ×4Arizona State University ×2Brown University ×2Duke University ×2Harvard Business School ×2Harvard University ×2LeapYear ×2The University of North Carolina at Chapel Hill ×2

What their founders studiedfrom 53 founders with field-of-study data

Computer Science ×20Engineering ×12Economics ×7Business & Management ×6Finance & Accounting ×3Mathematics & Statistics ×3Humanities ×2Physics ×2

Where their founders worked beforefrom 62 founders with career history

Goldman Sachs ×3HelloSign ×3Nitra ×3OpenHands AI ×3Amdocs ×2Apple ×2Carnegie Mellon University ×2Dropbox ×2

Accelerator rootsportfolio companies that came through a program

Y Combinator ×10500 Global ×2

2 founders hold a PhD · 15 hold an MBA (of 58 with degree data)

Investments · showing 145 of 154

founders shown can be your intro path

By year:2026 · 62025 · 72024 · 62023 · 62022 · 42021 · 52020 · 42019 · 22016 · 141 dated

Fiscal Notefiscalnote.comin𝕏OTC: NOTE

FiscalNote provides AI-powered software that aggregates and interprets legislative and regulatory data to help organizations track and influence policy outcomes.

AI & Machine LearningData & InfrastructureGovTechSaaSWashington, US

Tim Hwang(Co-founder)inGerald Yao(Co-founder)inJonathan Chen(Co-founder)inPaul Donnell(Chief Accounting Officer)inJon Slabaugh(CFO and Senior VP of Corporate Development)inRichard Henderson(Executive Officer)in

PartnerAaron Holiday· led

Co-investorsChaac VenturesConversion CapitalDorm RoomEastward Capital PartnersFitz Gate VenturesGPO Fund+12 more

Lunchbox Technologieslunchbox.ioin𝕏Oct 2020✓ verified

Lunchbox is a digital commerce platform for enterprise restaurants that unifies ordering, catering, loyalty, and marketing functions.

Enterprise SoftwareFoodTechRetail TechSaaSNew York, US

Nabeel Alamgir(Executive Chairman & Founder)inAndrew Boryk(Founder)inJames Walker(CEO)in

Board seatNnamdi Okike· per SEC Form D

Co-investorsPrimary Venture Partners1982 VenturesBeyond CapitalCoatue ManagementEvolution VC PartnersFrontline Ventures+4 more

UpsideHoMjoinupside.comin𝕏Oct 2024✓ verified

Upside provides end-to-end housing stabilization services for individuals experiencing housing instability within healthcare settings, serving health plans, employers, and their members across Medicaid, Medicare, and employer coverage.

Enterprise SoftwareHealthtechSaaSSocialWellness & FitnessFort Lauderdale, US

Jake(CEO)inPeter Badgley(Executive Officer, Director)inJacob Rothstein(Executive Officer, Director)

Board seatAaron Holiday· per SEC Form D

Co-investorsEquitage Ventures, L.L.C.Flare Capital PartnersTechstars

Meridianmeridian-ai.comin✓ verified

Meridian is a CRM and data platform for venture capital and investment firms that centralizes deal history, automates workflow logging, and enriches records with a bundled database of 26 million company records and verified contacts.

AI & Machine LearningFintechSaaS

Alex Sen(Founder & CEO)inAlex Zagoro(Chief Technology Officer)in

Co-investorsDniproAndreessen Horowitz

Thetopvoicesthetopvoices.comin✓ verified

Stake is a digital real estate investment platform that enables global property ownership by providing access to curated real estate funds and fractional ownership opportunities.

AI & Machine LearningB2B MarketplacesDeveloper ToolsFintechMedia & EntertainmentMobility & TransportationPropTechSaaSDubai, AE

Vytis Šliažas(CEO and co-founder)Manar Mahmassani(Co-Founder and Co-CEO)Rami Tabbara(Co-Founder and Co-CEO)

Co-investors359 CapitalCarya Venture PartnersEmirates NBDHF0Superhero CapitalWa'ed Ventures+1 more

Clerqclerq.ioOct 2025 · $21M

Clerq is a payment platform that lets businesses accept guaranteed bank-account payments from customers in store or online, reducing card processing fees and chargeback risk.

FintechSaaSNew York, US

Truett Dwyer(Executive Officer, Director)inBenjamin Markowitz(Executive Officer, Director)

BoardAdam Nelson(Director)

Board seatNnamdi Okike· per SEC Form D

Co-investorsCoalition OperatorsFikaFirstMark CapitalCommerce VenturesDash FundFika Ventures

Efficient Capital Labsecaplabs.cominSep 2024 · $7M

ECL provides non-dilutive, revenue-based financing to SaaS and AI companies with recurring revenue, using AI-assisted underwriting to make cross-border funding decisions quickly.

AI & Machine LearningFintechSaaSNew York, US

KAUSTAV DAS(Executive Officer, Director)inMANISH ARORA(Director)in

BoardSANDEEP PATIL(Director)in

Board seatAaron Holiday· per SEC Form D

Co-investorsEudemian VenturesEverywhere VenturesLorimer VenturesQED InvestorsTwo Culture CapitalThe Fund

Mandolinmandolin.cominJun 2021 · $12M

Mandolin provides AI agents that automate back-office workflows for specialty drug administration, including patient intake, benefits verification, prior authorizations, and revenue cycle management for infusion centers and clinical practices.

AI & Machine LearningEnterprise SoftwareHealthtechSan Francisco, US

Mary Kay Huse(Executive Officer, Director)Will Yin(CEO & Co-Founder)inRohit Rustagi(Co-Founder & COO)in

BoardMike Fitzgerald(Director)inEric Tobias(Director)inScott D. Dorsey(Director)in

Board seatNnamdi Okike· per SEC Form D

Co-investorsGreylock PartnersSignalFireSV AngelTimelessFoundryHigh Alpha+1 more

RentSpreerentspree.cominAug 2022

RentSpree is a digital platform that simplifies the home rental process by streamlining tenant screening, applications, and rent payments for renters, agents, and landlords.

MarketplacesPropTechSaaSLos Angeles, US

Michael Lucarelli(CEO & Co-founder)inPaul Sirisuphang(COO & Co-founder)Ekabutr Sirisuphang(Director)in

Board seatNnamdi Okike· per SEC Form D

Co-investorsAmplify.LAKube VCRally Ventures Management, LlcVesta VenturesGreen Visor CapitalTenOneTen Ventures

SkydropXskydropx.comin𝕏Oct 2021

SkydropX provides shipping automation software for e-commerce and retail businesses in Mexico, handling label generation, tracking, delivery time estimation, and return management across the fulfillment process.

Enterprise SoftwareLogistics & Supply ChainMarketplacesSaaSMonterrey, MX

Tavo Zambrano(Founder/CEO)inArmando Solbes(Founder)inLuis Garza Sada(Executive Officer, Director)Arnoldo Collin(Executive Officer, Director)

BoardWeston WAMP(Director)

Board seatAaron Holiday· per SEC Form D

Co-investorsSierra VenturesY CombinatorFJ Labs

Uptiquptiq.aiin𝕏Feb 2025 · $25M

Uptiq builds pre-built, domain-trained AI agents that automate operational work in banking and lending—covering prospecting, onboarding, underwriting, credit decisioning, risk monitoring, and client engagement.

AI & Machine LearningEnterprise SoftwareFintechMckinney, US

Snehal Fulzele(Executive Officer, Director)inGanapathi Palanipandian(Director)

BoardMichael Walsh(Director)

Board seatNnamdi Okike· per SEC Form D

Co-investorsCota CapitalCurql Collective, LLCEPIC VENTURESEvolution VenturesHourglass Venture PartnersSilverton Partners+6 more

Alexalex.comin𝕏

Alex is a recruitment automation platform that conducts candidate screening, interviews, and scoring using standardized questions and objective criteria.

AI & Machine LearningEnterprise SoftwareHR TechSaaSSan Francisco, US

Aaron Wang(Founder)inJohn Rytel(Founder)in

Co-investorsPeak XV PartnersY Combinator1984 Ventures Management, LlcHOF CapitalUncorrelated Ventures

All Hands AIall-hands.devin𝕏

All Hands develops OpenHands, an open-source, model-agnostic platform for building and running AI coding agents, providing the interface, automation, and control layer to scale from a single local agent to an organization-wide system.

AI & Machine LearningCloud ComputingDeveloper ToolsEnterprise Software

Robert Brennan(CEO)inGraham Neubig(Chief Scientist)inXingyao Wang(Chief AI Officer)inBen Solari(CRO)in

Co-investorsBetaworksFujitsu VenturesPillar VCMenloMenlo Ventures

Alma Securityalma.security

Alma Security provides runtime application security that monitors applications in real time and captures context-specific telemetry across APIs, microservices, databases, dataflow, and identities.

CybersecurityDeveloper ToolsSaaS

Andrenaandrena.comin𝕏May 2019

Andrena is a wireless Internet service provider that delivers high-speed connectivity to multi-tenant buildings and households using wireless technology beamed to building roofs, then distributed wirelessly to units.

CleantechCloud ComputingNew Jersey, US

Neil Chatterjee(Founder)inJames Smits(Founder)in

Co-investorsAfore CapitalBollinger Investment GroupCalm VenturesCastle Island VenturesChaos VenturesChapter One+7 more

AptDecoaptdeco.comin𝕏Dec 2021

AptDeco is an online marketplace where users buy and sell used furniture with integrated delivery services.

Circular EconomyConsumerE-commerceLogistics & Supply ChainMarketplacesNew York City, US

Reham Fagiri(Founder/CEO)inKalam Dennis(Founder)inkalam dennis(Founder)in

BoardBrett Topche(Director)in

Co-investorsComcast VenturesFJ LabsGreat Oaks Venture CapitalHearstLabRed & Blue VenturesSandalphon Capital+2 more

Arborjoinarbor.comin𝕏Feb 2026 · $6.3M

Arbor provides a platform that helps households access renewable electricity at lower costs while reducing energy-related complexity.

ConsumerEnergySaaS

Co-investorsCity LightFirst Round CapitalFJ LabsLowercarbon CapitalObvious VenturesThird Sphere+3 more

Arborarbor.coinFeb 2026 · $6.3M

Arbor develops power systems intended to provide reliable, emissions-free baseload power at large scale.

CleantechClimate TechEnergyLos Angeles, US

Brad Hartwig(Founder)in

Co-investorsCantos VenturesChrysalixCongruent VenturesGigascale CapitalVoyager PartnersChaac Ventures+3 more

Arbortryarbor.cominFeb 2026 · $6.3M

Arbor is an AI platform that turns an organization's video footage — webinars, interviews, and events — into a suite of repurposed content including clips, social posts, blog articles, email sequences, and pull quotes, with automatic brand templates and voice controls.

AI & Machine LearningMarketing TechSaaS

Co-investorsFoundersEdgeChaac VenturesComma CapitalLOWERCARBONNext Play Ventures

Arborarbor.ecoin𝕏Feb 2026 · $6.3M

Arbor provides a platform for measuring carbon emissions across supply chains using supply-chain-specific data points rather than global averages, enabling calculations in minutes instead of months or years.

CleantechClimate TechData & InfrastructureEnterprise SoftwareImpact & Social GoodSaaS

Danny Grande(Founder)in

Co-investorsStartup TNTThin Air LabsChaac VenturesComma CapitalGigascale CapitalLowercarbon Capital+1 more

Aryeoaryeo.comin𝕏Oct 2022 · $3.5M

Aryeo is a platform for real estate media professionals and photographers to manage booking, client management, scheduling, and delivery of listing media such as photos, 3D home tours, floor plans, and AI virtual staging.

Marketing TechPropTechSaaSBoston, US

Branick Weix(Executive Officer, Director)in

Co-investorsAmplo VenturesHyperplane Venture Capital

Attentionattention.cominOct 2025 · $14M

Attention provides AI-powered sales tools for revenue teams, automating CRM data entry and providing real-time sales coaching to improve call outcomes and rep productivity.

AI & Machine LearningEnterprise SoftwareSaaSSales Tech

Anis Bennaceur(Founder)inMatthias Wickenburg(Founder)in

Co-investorsAglae VenturesAlvenEniac VenturesRTP GlobalFrstLiquid Ventures

Beauty Bakeriebeautybakerie.com

Beauty Bakerie is a cosmetics brand that sells makeup remover wipes and other beauty products.

ConsumerDirect to ConsumerE-commerceWellness & Fitness

Cashmere Nicole(Founder and Leader)

Co-investorsMontage CapitalUnilever VenturesNew Voices

BetterView Marketplacebetterview.comin𝕏

Betterview provides a property intelligence platform that combines high-resolution aerial imagery with AI to detect roof condition, property perils, and risk factors, and integrates 2,500+ external data points with insurers' internal policy data.

AI & Machine LearningInsurTechMobility & TransportationPropTechSan Francisco, US

Dave TobiasDavid Lymanin

PartnerAaron Holiday· led

Co-investors500 GlobalManchesterStory Group, LLC

BigEyebigeye.comin𝕏

Bigeye is a data observability platform that monitors and improves the reliability of datasets and pipelines for data engineering teams.

AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareDaly City, US

Kyle Kirwan(Co-founder)inEgor Gryaznov(Co-founder)in

Co-investorsCoatue ManagementRackhouse Venture Management LpSequoia CapitalCostanoa VenturesIn-Q-Tel

Causalcausal.appinJun 2023 · $8.8M

Causal provides an extended planning and analysis (xP&A) platform for finance teams, offering budgeting, forecasting, scenario planning, and reporting that connects data across departments.

Enterprise SoftwareFintechSaaSClaymont, US

Taimur Abdaal(Executive Officer, Director, Promoter)inLukas Koebis(Executive Officer, Director, Promoter)

Co-investorsAccelCoatue ManagementAmity VenturesFlex Capital PartnersGlasswing VenturesTAU Ventures

Causelycausely.ioin𝕏Jun 2023 · $8.8M

Causely builds autonomous reliability software that helps engineering teams prevent incidents and reduce troubleshooting time in cloud-native environments.

AI & Machine LearningCloud ComputingDeveloper ToolsEnterprise Software

Dr. Shmuel Kliger(Founder)

Co-investors2.12 AngelsGlasswing VenturesTau VenturesAmity VenturesTAU Ventures

Cresicorcresicor.comAug 2022 · $18M

Spring, US

Alexander Whatley(CEO)

BoardJohn Cowgill(Director)in

Co-investorsTorch CapitalCostanoa VenturesVertex Ventures

Datadatacenterfrontier.comin𝕏

Data Center Frontier is a media and publishing organization covering the data center industry, cloud computing infrastructure, and artificial intelligence-era digital infrastructure.

Cloud ComputingData & InfrastructureMedia & EntertainmentCentral New Jersey, US

Rich Miller(Founder)in

Co-investorsAngeles Equity

DeepSourcedeepsource.comin𝕏Jun 2020

DeepSource provides developer tools for code quality and security.

AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSaaSSan Francisco, US

Sanket Saurav(Co-founder & CEO)inJai Pradeesh(Co-founder, President)in

Co-investorsFundersClubEssence Venture CapitalHack VCY CombinatorLiquid Ventures

Ederaedera.devinFeb 2025 · $15M

Edera builds products focused on secure computing.

Cloud ComputingCybersecurityDeveloper Tools

Alex Zenla(Founder)in

Co-investorsEniac VenturesFPVGenerationshipM12 (Microsoft's Venture Fund)Mantis CapitalRosecliff Ventures+2 more

Edgetry-edge.com

Edge AI is an analytics platform that lets users query complex commodity data in natural language, model scenarios, and stress test market conditions to surface trade insights.

AI & Machine LearningFintechSaaSNew York City, US

Shihab Malik(Founder)in

Co-investorsConvective Capital

Ellisellis.ai

Ellis is a platform for private credit fund managers that ingests, structures, validates, and reconciles data from disparate sources such as loan tapes, general ledgers, and fund admin reports.

AI & Machine LearningFintechSaaS

Co-investorsWilshire Lane CapitalFirst Round CapitalKhosla VenturesSlow Ventures

Ellisellis.comin𝕏

Ellis is a modern immigration law firm that combines legal services with a software platform to manage U.S. immigration and visa processes for companies.

HR TechLegalTechSaaSNew York City, US

Co-investorsAdapt VenturesV1 VCKhosla VenturesSlow Ventures

EngineEarsengineears.com𝕏

EngineEars is a platform that connects musicians with recording studios and engineers for booking and collaboration, while also providing music distribution and direct-to-fan sales tools.

B2B MarketplacesCreator EconomySaaSLos Angeles, US

Luke Sorenson(Founder)in

Co-investorsDrive CapitalSlauson & Co.

Forterraforterra.comin𝕏Nov 2025 · $238M

Forterra develops autonomous weapons, sensors, and battlefield systems using distributed control networks for defense operations.

AI & Machine LearningDefense TechRobotics

Alberto Lacaze(Chairman of the Board and President)inJoseph Putney(Chief Technology Officer)in

Co-investorsCRESCENT COVE CAPITALEnlightenment CapitalGlynn Capital ManagementNightDragonSalesforce VenturesSoftBank Vision Fund+8 more

Geniallygenially.comin𝕏

Genially is a platform for creating interactive and animated content, with built-in AI tools for content generation.

Creator EconomyEdTechSaaS

Luis García Díez(Founder)in

Co-investorsBrighteye VenturesOwl Ventures

Geniallygenial.lyin𝕏Sep 2021 · $20M

Genially is a content creation platform for building interactive presentations, courses, quizzes and games, with built-in AI agents, templates, and LMS integration via SCORM and LTI.

AI & Machine LearningEdTechSaaS

Luis García Díez(Founder)in

Co-investorsAthos CapitalCiveta InvestmentMarket One CapitalGP BullhoundJME VenturesOwl Ventures

Goldbellygoldbelly.comin𝕏

Goldbelly is an online marketplace that ships iconic foods, meals, desserts, regional specialties, and gourmet food gifts from restaurants and local shops to customers across the United States.

ConsumerE-commerceFoodTechMarketplacesMobility & TransportationNew York City, US

Joe Ariel(Founder/CEO)inJoel Gillman(Founder/Vice President of Engineering)inVanessa Torrivilla(Founder/CPO)inTrevor Stowin

PartnerAaron Holiday· led

Co-investors500 GlobalCrunchFundSpectrum EquityTuesday CapitalY CombinatorACE & Company+1 more

InpharmDinpharmd.comin𝕏Dec 2023 · $6M

InPharmD is a medical literature research platform that analyzes published studies to answer clinical pharmacology questions, specifically focused on adverse drug reactions and medication safety.

AI & Machine LearningDigital HealthHealthtechAtlanta, US

Ashish Advani(Founder)inTulasee Rao Chintha(Founder)in

Co-investorsAsymmetry VenturesAtlanta Tech VillageY Combinator

Iterableiterable.comin𝕏

Iterable provides customer communication and engagement software that enables brands to create targeted messaging experiences across email, SMS, push, and other channels.

AI & Machine LearningEnterprise SoftwareMarketing TechMedia & EntertainmentSaaSSan Francisco, US

Andrew Boni(Co-founder, CEO (2021-2025))inJustin ZhuinHaoran Zhu(Executive Officer, Director)

BoardSabri Murat Bicer(Director)

PartnerAaron Holiday· led

Co-investors500 GlobalAngelPadArtisanal VenturesBrighter CapitalCRV (Charles River Ventures)Delta-v Capital+7 more

Lunchboxlunchboxentertainment.com𝕏Feb 2022 · $50M

Lunchbox Entertainment develops competitive gaming experiences.

Gaming

Arik Torkelson(Founder / Chief Game Officer)inJack Wink(Founder / Co-CEO)Max Wink(Founder / Co-CEO)in

Co-investorsRyze LabsCoatue ManagementPrimaryPrimary Ventures

Lytelyte.city

Lyte operates a network of kiosks where users rent and return portable smartphone chargers via credit card or through the Lyte app, with options like day-passes and subscriptions.

ConsumerHardwareIoTSan Mateo, US

Dajiang Wei(Founder)in

Co-investorsBling CapitalExpansion Venture CapitalValkyrie

Meridianmeridiancleanenergy.com

Meridian Clean Energy focuses on long-term energy system decarbonization through the acquisition and management of renewable energy assets.

CleantechClimate TechEnergyOakland, US

John(Co-founder & CEO)Peter(Co-founder & Managing Partner)

Co-investorsPrelude VenturesAndreessen Horowitz

MM LaFleurmmlafleur.comin

MM.LaFleur is a personal styling service that delivers curated professional clothing selections to subscribers.

ConsumerDirect to ConsumerE-commerceNew York, US

Co-investorsElizabeth Street VenturesGrace Beauty Capital

Momosmomos.ioSep 2024 · $10M

Momos is an AI-powered customer platform used by multi-location restaurant, retail and F&B brands to manage the customer lifecycle.

Sai Alluri(Founder)in

Co-investorsCaptii VenturesK3 VenturesAlpha Wave GlobalCorrelation VenturesFJ LabsPeak XV Partners+3 more

Momosmomos.comin

Momos provides AI agents for hospitality brands that automate guest relations across channels such as reviews, SMS, email, and third-party delivery, auto-resolving support tickets and generating customer experience insights.

AI & Machine LearningMarketing TechSaaS

Sai Alluri(Founder)in

Co-investorsAlpha Wave GlobalBrainstorm VenturesHOF CapitalCaptii VenturesCorrelation VenturesFJ Labs+5 more

Nanitnanit.com

Nanit makes a smart baby monitor system with 1080p HD video, computer-vision sleep tracking, breathing monitoring via sensor-free garments, and environmental tracking, plus a companion app with subscription-based sleep and development analytics.

Digital HealthHardwareIoT

Anushka Salinasin

PartnerAaron Holiday· led

Co-investorsEastward Capital PartnersGV (Google Ventures)HCVCRRE VenturesSpringcoast Capital PartnersStory Ventures+2 more

Navatticnavattic.comin

Navattic builds interactive product demo software that helps sales teams engage buyers and accelerate deal closure.

Enterprise SoftwareMarketing TechSaaSSales TechNew York City, US

Neil McLean(Founder)inRandy Frank(Founder)inChris Hoyle(Founder)in

Co-investorsCanvas VenturesLighthouse Network Ventures LlcRecall CapitalY Combinator

Nflnfl.comin𝕏

The National Football League (NFL) is a professional sports organization that operates a league of American football teams and produces content related to professional football, including news, fantasy sports, and merchandise.

Media & EntertainmentSports Tech

o11o11.aiin𝕏

o11 builds AI agents integrated into enterprise applications.

AI & Machine LearningEnterprise SoftwareFintechSaaSSan Francisco, US

Aryah Oztanir(Founder / CEO)inAjay Misra(Founder)in

Co-investorsY Combinator

Oortoort.ioin𝕏Sep 2020

Oort provided identity security and threat detection, now part of Cisco as Cisco Identity Intelligence, offering visibility into an organization's identity population and helping move toward passwordless authentication.

CybersecurityEnterprise SoftwareSaaSHarvard, US

Matthew Caulfield(Executive Officer, Director)

Co-investors.406 VenturesCisco InvestmentsDreamit VenturesEnergy Impact PartnersArgon VenturesEnergy Revolution Ventures+2 more

Overtimeitsovertime.com𝕏

Overtime builds and operates sports leagues and branded content properties for younger audiences globally, generating revenue through sponsorships, licensing, media rights, and e-commerce.

Creator EconomyMedia & EntertainmentSports Tech

Dan Porter(Founder & CEO)Zack Weiner(Founder)in

Co-investors359 CapitalAndreessen HorowitzBezos ExpeditionsBlack CapitalSpark CapitalWinslow Capital+11 more

Overtimeovertime.tv𝕏

Overtime creates and operates new sports leagues and media IP — including OTE and OT Select in basketball and OT7 and OT Nationals in football — while producing over 150 weekly pieces of original sports content for its global audience of next-generation fans and athletes.

ConsumerMedia & EntertainmentSports TechBrooklyn, US

Daniel Porter(Executive Officer, Director)Zachary Weiner(Founder)inZack Weiner(Founder)in

Co-investors359 CapitalAndreessen HorowitzBezos ExpeditionsBlack CapitalSpark CapitalWinslow Capital+15 more

Rad.rad.livein

Streaming for next-gen video creators in AI, XR, and blockchain

New York City, US

Co-investorsColopl NextDG Daiwa VenturesGFR FundSocial StartsSony Ventures CorporationTechstars

Redblock AIredblock.ai

Redblock builds agentic AI that automatically executes identity and access management actions—such as joiner/mover/leaver lifecycle changes, account aggregation, and access revocation—inside business applications that don't integrate with existing IAM systems.

AI & Machine LearningCybersecurityEnterprise Software

Repacketrepacket.cominJun 2023

Repacket builds security software that detects and prevents employee mistakes in real time.

AI & Machine LearningCybersecurityEnterprise SoftwareSaaSVancouver, CA

Noah Stanford(Founder)in

Co-investorsY CombinatorInitialized Capital468 Capital

Residentresidenthome.comin𝕏

Resident is a direct-to-consumer mattress company that manufactures and sells memory foam and hybrid mattresses under brands including Nectar, DreamCloud, Awara, and Siena.

ConsumerDirect to ConsumerE-commerceLas Vegas, US

Eric Hutchinson(Co-Founder & CEO)inRan ReskeinCraig SchmeizerinSharon DaganinTomer HatavinScott McLeod(Co-Founder & Chief of Staff)in

Co-investorsConductive VenturesGlynn Capital ManagementLiquidity CapitalNexus Capital ManagementTop Corner CapitalVCFA Group

Rifinitirifiniti.comMar 2016

Boston, US

Michael Gresty(Executive Officer, Director)Irina Mladenova(Executive Officer, Director)

BoardDominic Endicott(Director)inNnamdi Okike(Director)inJeff Herrmann(Director)

Co-investorsWalnut Venture Associates

Other

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

Negotiatus Corp.ReflexAI, Inc.Setpoint Technologies Inc.VividlyAbacusAccendAcclaimAgencyAirfoldAliceAptyAthena IntelligenceBeFreedBeSpokeBesxar SpaceCondorCotissCrescendo HealthCube DevDiagonalECLFirestormFly LabsGeneral AnalysisGimlet LabsHallwayHanover ParkHaplotype LabsHockeyStackInner BalanceInnerwellJackpotJudyKickoffLaunchableLeagueAppsLegendLinotypeMerge VRMerokaOnDatOrderPairAIPanther LabsPointhoundPomoPoshlyReflex AIRosieRunAnywhereSandtableShift5SkyDropSlopeSourceSource 3SpongeStradaSuperteacherTraverseUpsideUSCTVoice AI

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.

Exits · 11

1 IPOs · 10 acquisitions · showing 10

Fiscal NoteOTC: NOTEAbacusacq. by CertifyAliceacq. by ExpediaAryeoacq. by Zillow GroupFly Labsacq. by GoogleLaunchableacq. by CloudBeesOnDatacq. by Akamai TechnologiesPanther Labsacq. by DatabricksPoshlyacq. by SuzyRosieacq. by Instacart

Portfolio news

latest coverage across their companies

Frequently asked questions

How many investments has 645 Ventures made?
645 Ventures has 154 tracked investments, 11 of which have exited, including 17 dated in the last 24 months.
What stage does 645 Ventures invest at?
645 Ventures invests at the Pre-Seed, Seed, Series A, Series B stages.
What is 645 Ventures's typical check size?
645 Ventures typically writes checks of $1M – $5M.
What sectors does 645 Ventures focus on?
645 Ventures focuses on AI & Machine Learning, Consumer, Data & Infrastructure, Enterprise Software, Fintech, SaaS, Sector Agnostic, Space Tech.
Where is 645 Ventures located?
645 Ventures is headquartered in New York, US.
Does 645 Ventures lead rounds?
Yes, 645 Ventures leads investment rounds.
Who does 645 Ventures co-invest with?
645 Ventures most often shares deals with Y Combinator, 500 Global, FJ Labs, among 198 tracked co-investors.

Media · Podcasts & interviews

featuring the team

448th 1Mby1M Entrepreneurship Podcast With Nnamdi Okike, 645 Ventures

1Mby1M Roundtables · Nnamdi Okike

Nnamdi Okike on Building 645 Ventures, Bias in Fundraising, and Being a Boston Sports Fan in New ...

Something Ventured Podcast · Nnamdi Okike

Watch CNBC's full interview with 645 Ventures' Nnamdi Okike

Nnamdi Okike · cnbc.com

645 Ventures' Nnamdi Okike on investing in tech's 'behavioral change economy'

CNBC Television · Nnamdi Okike

448th 1Mby1M Roundtable June 27, 2019: With Nnamdi Okike, 645 Ventures

1Mby1M Roundtables · Nnamdi Okike

Fireside Chat: 645 Ventures Co-Founder Aaron Holiday

Aaron Holiday · vimeo.com

Co-investors · 68

Andreessen Horowitz

Andreessen Horowitz (a16z) is a venture capital firm founded in 2009 by Marc Andreessen and Ben Horowitz, known for pioneering the platform model with a large team of operators supporting founders across stages.

$500K – $50M
FJ Labs

FJ Labs is an early-stage investment firm specializing in marketplaces and network-effect businesses, taking an angel-style co-investment approach alongside institutional venture funds worldwide.

$100K – $3M
Costanoa Ventures

Costanoa Ventures is an early-stage venture capital firm that backs a select group of founders solving large, difficult problems, positioning itself as a long-term, operationally engaged partner from a company's earliest days through later milestones.

Both backed · 3
$500K – $8M
Chaac Ventures

Chaac Ventures is an early-stage venture firm that backs founders connected to the Princeton University tech and innovation ecosystem, leveraging that global network to help portfolio companies grow.

$250K – $1M
CRV (Charles River Ventures)

CRV is a venture capital firm that backs founders at the seed and Series A stages, focusing on those with deep conviction and unique insights.

$250K – $5M
Great Oaks Venture Capital

Great Oaks Venture Capital is a New York-based early-stage investor that partners with founders at the earliest stages of company building across the United States.

Both backed · 2
$50K – $500K
Eniac Ventures

Eniac Ventures partners with early-stage founders, backing companies from 0 to 1.

Both backed · 2
$1.2M
Liquid Ventures

Liquid 2 is an early- and growth-stage venture capital firm that invests in founders across all sectors of technology, providing capital along with support from a network of operators.

Both backed · 2
$250K – $5M
QED Investors

QED Investors is a venture capital firm focused on financial services, founded by former Capital One executives to back founders bringing transparency and fairness to fintech.

$30K – $25M
Rally Ventures Management, Llc

Rally Ventures is an investment firm focused on business technology companies, backing a select group of high-potential startups to help them grow market impact and value.

Both backed · 2
RentSpreeNegotiatus Corp.
$100K – $4M
Amity Ventures

Amity Ventures is an early-stage venture firm that leads rounds, works closely with founders, and maintains a deliberately concentrated portfolio of only 3-5 investments per year.

Both backed · 2
$1M – $5M
Craft Ventures

Craft Ventures is a venture capital firm run by a team of former founders, operators, and investors who partner closely with founders to help build and scale technology companies.

Both backed · 1
$50K – $50M
56 more co-investors

Greylock PartnersInsight PartnersEverywhere VenturesSpark CapitalTiger Global ManagementSusa VenturesSierra VenturesTrinity VenturesFoundryPrimary Venture PartnersHigh AlphaDecibel PartnersOwl VenturesSilverton PartnersFlare Capital PartnersEvolution Equity PartnersMarket One Capital3VCGrace Beauty CapitalCantos VenturesPrimo VenturesCurql Collective, LLCRedpoint VenturesBain Capital VenturesSapphire VenturesOffline VenturesUpHonest CapitalFreestyle CapitalStride VCDN CapitalBase10 PartnersAccompliceGaingelsLeft Lane CapitalAlleyCorpTeamworthy VenturesFlourish VenturesAnorak VenturesBaruch Future VenturesSummit PartnersExpansive VenturesEndeavor CatalystGutter CapitalThirty Five Ventures (35V)Vera EquityContour Venture PartnersSoftBank CapitalANIMO VenturesPage One VenturesLiveOak VenturesProof GroupBain Capital CryptoA*Infinite CapitalMetaplanetLearnLaunch Fund Accelerator

Firms observed investing alongside 645 Ventures, from public investor directories. Shared companies are the overlap with 645 Ventures's recorded portfolio.

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