Find your path to Joel
652 people in our graph share verified history with Joel — schools, employers, funds. One of them is your warm intro.
Laura BuhlerunlockedJoel: together at Stripe (2025–2026)
×5Joel: together at Stripe
×5Joel: together at Y Combinator
Joel: together at True Link
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 · 4
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 mafia10,230
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianPartnerFounded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Paradigm +1
+ 10,223 more
Stripe mafia152
Also came through, then founded or led a company.
Hemant TanejaInvestor (former Board Member)Founded Hippocratic AIMatt HuangBoard MemberFounded Paradigm +1Patrick CollisonCo-founder & CEOFounded AuctomaticGreg BrockmanFounding Engineer, then first CTOFounded OpenAIDaniela AmodeiEarly employee — Risk ManagerFounded AnthropicArvid LunnemarkSoftware EngineeringFounded Cursor
+ 145 more
Personal Capital mafia4
Also came through, then founded or led a company.
True Link mafia2
Also came through, then founded or led a company.
Same school
Also attended Princeton University998
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 VenturesAndrewAdvisor at Clear Ventures
+ 992 more
Also attended Y Combinator2,000
Ryan SheaCo-founder of Blockstack (Stacks)Suhail DoshiFounder of Mixpanel; founder of ParticleArhaan A.Deeptech Fellow at Clear VenturesAkshat GoenkaInvestor at Moonfire VenturesJon XuGeneral Partner at Y CombinatorChris GoldaGeneral Partner at Y Combinator
+ 1,994 more
Shared employers
Also worked at Stripe247
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
+ 241 more
