Fundraising Fox

Sean OBrien

Founder

Founder at CollectWise

New York, New York, United States

FoundedCollectWise · YC

About

Sean O'Brien is co-founder and CEO of CollectWise. He previously scaled a digital agency and worked at another fintech startup, and holds a degree in Computer Science and Finance from the University of Virginia.

Founder at CollectWiseYC F24

Intro paths

YC

Sean went through Y Combinator (Fall 2024) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Nicolas Dessaigne, General Partner at Y Combinator — the partner who ran CollectWise's batch and knows the company first-hand. YC profile ↗

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In turn, Sean can intro founders to CollectWise's investors below.

CollectWise's investors · 5

1984 Ventures Management, LlcSan Francisco · $1M checksCoreNest Capital$500K checks · since 2025GMO VenturePartnersTokyoMyAsiaVCSeattleY CombinatorSan Francisco · $500K checks · since 2024

Experience

  1. CollectWiseFounder and CEOcurrent2024 — present
  2. AstriusFounder and CEO2022 — 2024
  3. PulseboundOwner2019 — 2023
  4. McIntire Investment InstitutePortfolio Manager2021 — 2023
  5. RepublicAnalyst2019

Skills & more

JavaReact.jsBlockchainSoftware as a Service (SaaS)Growth Hacking6Lead Generation7Software Development5Investment Analysis1Digital Marketing1Social Media Marketing3EntrepreneurshipFinTech
+1 moreStart-up Ventures

From Sean's professional profile.

Frequently asked questions

Who is Sean OBrien?
Sean O'Brien is co-founder and CEO of CollectWise. He previously scaled a digital agency and worked at another fintech startup, and holds a degree in Computer Science and Finance from the University of Virginia.
Where does Sean OBrien work?
Sean OBrien is Founder of CollectWise.
What companies did Sean OBrien found?
Sean OBrien founded CollectWise.
Where did Sean OBrien go to school?
Sean OBrien studied at Y Combinator; University of Virginia (Double Major: Computer Science and Finance).

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

Techstars mafia238

Also came through, then founded or led a company.

David CummingsTechstars Boulder Accelerator 2012Founded Undaunted +4Jeremy AchinCloud Class 2013Founded Neo Cybernetica +2TJ ParkerTechstars Boston Accelerator 2013Founded Tjparker +2Spencer RascoffMentorFounded HeyLibby +2Sanjiv SanghaviTechstars New York City Accelerator 2012Founded Texture +2Brandon PatonMentorFounded Glider +2

+ 231 more

University of Virginia mafia74

Also came through, then founded or led a company.

Alexis OhanianB.A.Founded RedditSteve HuffmanBSFounded Aisle50 +2Stew FortierBachelor's DegreeFounded MassRoots +2Byron HewettBSFounded Brava Diagnostics +1Jacob PetersB.S. CommerceFounded Superpower +1Patrick J. CostelloBachelor of Arts with DistinctionFounded Naytev +1

+ 67 more

Same school

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

Also attended University of Virginia565

Alexis OhanianFounder & General Partner of Seven Seven SixAndy FligelSenior Managing Director at Intel CapitalKandace ElamVice President of GTM Talent at Menlo VenturesTrevor KienzleInvestor at Correlation VenturesFrank RotmanCo-Founder and Partner Emeritus at QED InvestorsMegan LightcapPartner, Creator Fund at Slow Ventures

+ 559 more

Shared employers

Also worked at CollectWise1

Vivek IsukapalliFounder at ValueMate

Also worked at McIntire Investment Institute4

Shelby EwingAssociate at Altamont Capital PartnersNina LeichtSenior Legal and Compliance Associate at Altamont Capital PartnersMick RemondinoCFO/CCO at Realization Capital PartnersSom MohapatraFounder at Hadrius

Also worked at Republic48

Nathaniel HardingManaging Partner at Cortado VenturesMike SherbakovGeneral Partner at The Veteran FundPaulina SzyzdekPrincipal at E12 Venture Capital, LlcKathryn CartiniCo-Founding Partner & Advisor at Chloe CapitalKatie WollbergHead of People at Hivemind Capital PartnersBoris RevsinManaging Director at Tribe Capital Firstlook

+ 42 more