Fundraising Fox

Rafa Pereira

Unicorn founder

Founder at Onebrief

Lisbon, Lisbon, Portugal

FoundedOnebrief$2.1B · YC

About

Rafa Pereira has held engineering and product leadership roles at data.world and IAC, and holds BS and MBA degrees. He began software development as a teenager and has continued building products since 1999.

Founder at OnebriefYC S21

Intro paths

YC

Rafa went through Y Combinator (Summer 2021) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Brad Flora, Backing expeditions into the future — the partner who ran Onebrief's batch and knows the company first-hand. YC profile ↗

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In turn, Rafa can intro founders to Onebrief's investors below.

Onebrief's investors · 18

9Yards CapitalNew York · $100K – $10M checks · since 2025Alchemist AcceleratorSan Francisco · $30K checksAnorak VenturesLos Angeles · $25K – $400K checksBattery VenturesBoston · $500K – $100M checks · since 2026Caffeinated CapitalSan Francisco · $3M – $50M checks · since 2026General CatalystSan Francisco · $30M checks · since 2024Human CapitalSan Francisco · $250K – $200M checks · since 2025Insight PartnersNew York · $120M – $350M checks · since 2026Kyber Knight CapitalSan FranciscoPROOFArlingtonSalesforce VenturesSan Francisco · $5M – $50M checks · since 2026Sapphire VenturesMenlo Park · $5M – $20M checks · since 2026Signia Venture PartnersMenlo Park · $500K – $2M checksSummit Peak InvestmentsFort WorthU.S. Air Forcesince 2019U.S. Navysince 2023Visary CapitalSyossetY CombinatorSan Francisco · $500K checks · since 2021

Co-founders at Onebrief

GDGrant Demaree
Grant DemareeFounder

Experience

  1. OnebriefCo-Founder (Retired)current2019 — presentAustin, Texas, United States
  2. OnebriefHead of Product2024 — 2025Austin, Texas, United States
  3. OnebriefChief Technology Officer2019 — 2023Austin, Texas, United States
  4. Capital FactoryMentor2017 — 2021Austin, Texas Metropolitan Area
  5. data.worldDirector of Software Engineering2016 — 2019Austin, Texas Metropolitan Area
  6. IAC ApplicationsVP, Software Engineering2013 — 2016New York City Metropolitan Area
  7. IAC ApplicationsDirector, Software Engineering2010 — 2013New York City Metropolitan Area
  8. Bunge Global AgribusinessEnterprise Architect2006 — 2010New York City Metropolitan Area
  9. Stefanini U.S.Enterprise Architect2006 — 2010New York City Metropolitan Area
  10. Stefanini U.S.Software Architect2004 — 2006Brazil
  11. XimpCo-founder / Instructor2004 — 2006Brazil
  12. Algar TelecomJava Developer2001 — 2004Brazil

Skills & more

Product ManagementProduct DesignStrategic LeadershipEntrepreneurship4Enterprise Architecture6Large Scale SystemsSOA54OOPWeb Development15Integration44MOMWeb Services9
+12 moreApplication ServersTIBCOAgile Project ManagementRUPExtreme ProgrammingScrumAnalyticsMobile ApplicationsUMLJ2EEJavaHTML

Languages Portuguese · Spanish

From Rafa's professional profile.

Frequently asked questions

Who is Rafa Pereira?
Rafa Pereira has held engineering and product leadership roles at data.world and IAC, and holds BS and MBA degrees. He began software development as a teenager and has continued building products since 1999.
Where does Rafa Pereira work?
Rafa Pereira is Founder of Onebrief.
What companies did Rafa Pereira found?
Rafa Pereira founded Onebrief.
Where did Rafa Pereira go to school?
Rafa Pereira studied at Baruch College (MBA, Entrepreneurship); Universidade Federal de Minas Gerais (MS (Incomplete), Computer Science); Universidade Federal de Uberlândia - UFU (BS, Computer Science).

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

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Baruch College mafia11

Also came through, then founded or led a company.

Mario RuizBBAFounded Infinity VenturesAshok KamalMaster of Business Administration - MBAFounded OutsiteRaymond YipBachelor of Business Administration (BBA)Founded ShoplineKirill GourovB.B.A.Founded CsquaredEdrizio De La CruzComputer ScienceFounded ArcusJuan MaldonadoBachelor's degreeFounded Arcus

+ 4 more

Capital Factory mafia9

Also came through, then founded or led a company.

Steve SemelsbergerInvestorFounded YouEarnedIt +1Joshua BaerFounder & CEOFounded Colossal BiosciencesBryan ChambersPresidentFounded Colossal BiosciencesGordon DaughertyInvestorFounded Colossal BiosciencesCraig CummingsDirector, Military and Veteran AffairsFounded MoonshotsJC GlancyMentorFounded Zenbusiness

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Universidade Federal de Minas Gerais mafia2

Also came through, then founded or led a company.

Hugo BarraB.S.Founded Detect

Universidade Federal de Uberlândia - UFU mafia2

Also came through, then founded or led a company.

Fernando NeryBachelor of Business Administration (BBA)Founded Portão 3

Same school

Also attended Baruch College62

Bella FilerChief Financial Officer at CAVU Consumer PartnersNitol HannanController at StripesMurat CanogluExperts | Venture Partner at 212Einat NemeshVenture Partner at TAU VenturesLeah TarragoInvestment Analyst at Rocana VenturesNoémie OiknineInvestor at Maor Investments

+ 56 more

Also attended Universidade Federal de Minas Gerais18

Pedro GomesDirector, Intelligence & Transformation at Bright Pixel CapitalHugo BarraVenture Partner at AtlanticoGustavo JunqueiraCOO at KPTL Arbitrage ManagementGuilherme PaivaPrincipal at The Yield Lab LatamDiego GomesPartner at SaaSholicGustavo SouzaPartner at SaaSholic

+ 12 more

Also attended Universidade Federal de Uberlândia - UFU2

Cairo BastosProgram Manager at NESsTFernando NeryFounder at Portão 3

Shared employers

Also worked at Onebrief7

Paul KwanInvestment Team at General CatalystLewis CraparottaLieutenant General USMC (ret.) at NEW VISTA CAPITALMichael BrownGeneral Partner at Battery VenturesRichard WellsManaging Director at Insight PartnersFaizan J. KhanFounder and CIO at Visary CapitalRaymond TonsingPartner at Caffeinated Capital

+ 1 more

Also worked at Capital Factory22

Joshua BaerFounder & CEO at Capital FactoryBryan ChambersCo-Founder & President at Capital FactoryGordon DaughertyCo-Founder & Chairman at Capital FactoryRob TaylorOperating Partner at Silverton PartnersTriet NguyenPrincipal at Render CapitalJohn RobertPartner, Head of Marketing and Communications at Multicoin Capital

+ 16 more

Also worked at data.world9

Patrick ChangFounder and Managing Partner at Dispersion CapitalDavid LiuInvestor at EPIC VENTURESHaley BrannanPartner at Operator CollectiveJulie Allegro MaplesFounder & General Partner at FYRFLY Venture PartnersPhilipp StaufferFounder & General Partner at FYRFLY Venture PartnersAdam ZeplainCo-Founder & Managing Partner at mark vc

+ 3 more

Also worked at IAC Applications29

Geoff YangCo-Founder at Redpoint VenturesBrian Bustamante-NicholsonPartner at GreycroftBryan CiambellaGeneral Partner at PROOFNisa AmoilsManaging Partner at A100X VenturesMo KoyfmanFounder and General Partner at Shine CapitalHong TangVenture Partner at Foothill Ventures

+ 23 more