About
Joel Karacozoff cofounded Balto (YC W19), which was acquired by Fubo. He currently leads YC partnerships at Stripe and is an angel investor. He graduated from Princeton, where he competed in Division 1 football and track.
Founder at BaltoYC W19
Intro paths
YC
Joel went through Y Combinator (Winter 2019) — any YC alum in your network can reach them through the YC community.
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In turn, Joel can intro founders to Balto's investors below.
Balto's investors · 3
Co-founders at Balto
NM
Nicky MontanaFounder
SC
Spencer CassidyFounder/Head of Growth
Experience
- StripeHead of YC Partnershipscurrent2025 — presentSan Francisco Bay Area
- Halo LabsFounder and Partnercurrent2020 — presentSan Francisco Bay Area
- fuboTVDirector of Product2020 — 2022San Francisco Bay Area
- AllocationsHead of Product and Engineering2020San Francisco Bay Area
- BaltoCo-Founder, Head of Product and Engineering (YC W19, Acquired by NYSE: FUBO)2018 — 2020San Francisco Bay Area
- True Link FinancialProduct Manager2017 — 2018San Francisco Bay Area
- BrightsideProduct Manager2017San Francisco Bay Area
- TuitionSafeCo-Founder2016 — 2017San Francisco Bay Area
- Personal CapitalProduct Manager2015 — 2016San Francisco Bay Area
- Personal CapitalData Analyst2014 — 2015Redwood City
- Personal CapitalFinancial Advisor2013 — 2014Denver
- 360 FinancialFinancial Advisor & Manager of Asset Operations2010 — 2013San Francisco Bay Area
Skills & more
Research SkillsVenture FinancingVenture CapitalAngel InvestingPresentationsBusiness Relationship ManagementPresentation SkillsOriginatingMarket AnalysisTimelinesSoftware DevelopmentCode Review
+12 more
Express.jsProduct Road MappingEntrepreneurshipFinancial ModelingProject ManagementSeries 65Life & Health Insurance LicensesSoftwareTeamworkCommunicationLeadershipNegotiation- The Data Scientist’s Toolbox — Coursera Course Certificates
- Series 65 — FINRA
From Joel's professional profile.
Frequently asked questions
- Who is Joel Karacozoff?
- Joel Karacozoff cofounded Balto (YC W19), which was acquired by Fubo. He currently leads YC partnerships at Stripe and is an angel investor. He graduated from Princeton, where he competed in Division 1 football and track.
- Where does Joel Karacozoff work?
- Joel Karacozoff is Founder of Balto.
- What companies did Joel Karacozoff found?
- Joel Karacozoff founded Balto.
- Where did Joel Karacozoff go to school?
- Joel Karacozoff studied at Princeton University (BA, History); Y Combinator.
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
+ 4,709 more
Princeton University mafia160
Also came through, then founded or led a company.
Ryan SheaBSEFounded StacksDario AmodeiPhDFounded AnthropicFei-Fei LiBachelor of Arts - BAFounded World LabsChristian SchadeBachelor of Arts - BAFounded Halda Therapeutics +2Emin Gun SirerB.S.E.Founded Avalanche +2Luke EvninBachelor’s DegreeFounded Mpmcapital +1
+ 153 more
Stripe mafia91
Also came through, then founded or led a company.
Matt HuangBoard MemberFounded HotspotsPatrick CollisonCo-founder & CEOFounded AuctomaticGreg BrockmanFounding Engineer, then first CTOFounded OpenAIDaniela AmodeiEarly employee — Risk ManagerFounded AnthropicArvid LunnemarkSoftware EngineeringFounded CursorParker ConradMember Board of DirectorsFounded Zenefits +1
+ 84 more
Personal Capital mafia3
Also came through, then founded or led a company.
Same school
Also attended Princeton University745
Fabrice GrindaCo-founder & Managing Partner at FJ LabsRyan SheaCo-founder of Blockstack (Stacks)Dario AmodeiCo-founder & CEO of AnthropicFei-Fei LiCo-founder & CEO of World Labs; Sequoia Professor of Computer Science at StanfordCat WuInvestor at Index VenturesKJ SidberryInvestor at GV (Google Ventures)
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+ 739 more
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports Ventures
+ 1,994 more
Shared employers
Also worked at Stripe199
Hemant TanejaCEO & Managing Director of General CatalystMatt HuangCo-founder and Managing Partner at ParadigmLuciana LixandruPartner at Sequoia CapitalPatrick CollisonCo-founder & CEO of StripeJohn CollisonCo-founder & President of StripeGreg BrockmanCo-founder & President of OpenAI
+ 193 more
