Fundraising Fox

Bernard Aceituno

Founder

Founder at StackAI

San Francisco, California, United States

FoundedStackAI · YC

About

Bernard Aceituno holds a PhD from MIT and is co-founder and president of StackAI, which develops enterprise AI applications.

LinkedIn ↗X / Twitter ↗
Latest on 𝕏

Bernardo Aceituno @bernaceituno

We at @stackai got early access to GPT-5.4 — and the results are remarkable. One of our benchmarks (analyzing financial records across 50,000 pages) had never been passed by any LLM. GPT-5.4 is the first to clear it. Impressive work, @OpenAI 😮 https://t.co/7RDC3VbeMm

Mar 5, 2026 · ♥ 16 · ⇄ 2

Bernardo Aceituno @bernaceituno

https://t.co/rz0LJ8zKBP

Feb 12, 2026 · ♥ 24 · ⇄ 13

Bernardo Aceituno @bernaceituno

Link 👉 https://t.co/HkcaiQnlRh

Feb 3, 2026 · ♥ 2

Founder at StackAIYC W23

Intro paths

YC

Bernard went through Y Combinator (Winter 2023) — 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 StackAI's batch and knows the company first-hand. YC profile ↗

→

In turn, Bernard can intro founders to StackAI's investors below.

StackAI's investors · 2

Lobby CapitalY Combinator

Co-founders at StackAI

TRToni Rosinol
Toni RosinolCo-Founder & CEO

Experience

  1. StackAICo-Founder & Presidentcurrent2023 — presentSan Francisco, California, United States
  2. StartupsAngel Investorcurrent2024 — presentSan Francisco Bay Area
  3. Massachusetts Institute of TechnologyResearcher2018 — 2022Greater Boston
  4. MetaAI Research Scientist2020 — 2021Cambridge, Massachusetts, United States
  5. Grupo AktioCo-Founder2018 — 2019Caracas, Federal District, Venezuela
  6. Istituto Italiano di TecnologiaAI Research Scientist2017Genoa Area, Italy
  7. Universidad Simón BolívarResearch Assistant2016 — 2017Caracas, Federal District, Venezuela
  8. Universidad Simón BolívarTeaching Assistant2014 — 2017Caracas, Venezuela

Education

  1. Massachusetts Institute of TechnologyDoctor of Philosophy (PhD), Mechanical Engineering2020 — 2022
  2. Massachusetts Institute of TechnologyMaster of Science (SM), Mechanical Engineering2018 — 2020
  3. MIT Sloan School of ManagementMinor on Business and Administration2020 — 2022
  4. Universidad Simón BolívarBachelor of Science, Electrical Engineering and Computer Science2012 — 2018

Skills & more

Teamwork77Robotics66Machine Learning42Project Management14Computer Vision11Statistical Modeling5Corporate Finance6Matlab23C++11Python (Programming Language)7Public Speaking28English29
+5 moreConvex OptimizationNonlinear OptimizationCombinatorial OptimizationROSContact Mechanics

Languages English · Hebrew · Spanish

From Bernard's professional profile.

Founder mafias

Y Combinator mafia8,668

Also came through, then founded or led a company.

Sam AltmanPresidentFounded LooptFred EhrsamYC Summer 2012Founded CoinbaseMatt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded PursuitDelian AsparouhovYC Summer 2014Founded Nightingale +1Justin KanYC Winter 2018Founded Rye +3

+ 8,661 more

Massachusetts Institute of Technology mafia464

Also came through, then founded or led a company.

Hemant TanejaS.B.Founded CommureMatt HuangB.S.Founded HotspotsDelian AsparouhovDropoutFounded Nightingale +1Noubar AfeyanPhDFounded ProFound Therapeutics +6Geoffrey von MaltzahnPhDFounded Sana Biotechnology +3Yet-Ming ChiangS.B.Founded Addis Energy +2

+ 457 more

MIT Sloan School of Management mafia54

Also came through, then founded or led a company.

Hemant TanejaS.M.Founded CommureJason TraffMaster of Business Administration (M.B.A.)Founded Shipwell +1Joe WilsonMaster of Business Administration (M.B.A.)Founded Multiply LabsWal van LieropAdvanced Executive CourseFounded MineSenseJulián MeloInnovate the future - Executive programFounded UbitsGleb ChuvpiloFinancial Technology Option (FTO)Founded Authy

+ 47 more

Universidad Simón Bolívar mafia2

Also came through, then founded or led a company.

Carlos MorenoIngenieríaFounded Palitronica Inc

Same school

Also attended Massachusetts Institute of Technology1,289

Fred WilsonCo-founder & Partner at Union Square VenturesElad GilSolo general partner investing through Gil CapitalAileen LeeFounder & Managing Partner of Cowboy VenturesHemant TanejaCEO & Managing Director of General CatalystNat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGBrad FeldCo-founder of Foundry and Techstars

+ 1,283 more

Also attended MIT Sloan School of Management491

Doug LeonePartner at Sequoia Capital; former Global Managing PartnerHemant TanejaCEO & Managing Director of General CatalystBrad FeldCo-founder of Foundry and TechstarsChris MorrisProcess Specialist, Exit Readiness at Mayfair Equity PartnersBirgitteInvestor at InvestinorOlaInvestor at Investinor

+ 485 more

Also attended Universidad Simón Bolívar5

Alejandro CarbonBoard of Directors at Nuwa CapitalPatricia WexlerFounder & General Partner at AvilaDiego SerebriskyCo-Founder & Managing Partner at Dalus CapitalMartha Laura LópezOperating Partner at Zentynel Frontier InvestmentsCarlos MorenoFounder at Palitronica Inc

Shared employers

Also worked at StackAI4

Collin WallaceBoard Member at MassChallenge MexicoToni RosinolCo-Founder & CEO at StackAIPablo OmenacaFounder at KarumiToni LopezFounder at Karumi

Also worked at Massachusetts Institute of Technology438

Aileen LeeFounder & Managing Partner of Cowboy VenturesMatt HuangCo-founder and Managing Partner at ParadigmScott BillerInvestor at GV (Google Ventures)Noubar AfeyanInvestor at Flagship PioneeringVyas RamananVenture Partner at Third Rock VenturesRhie LimPartner, Global Strategy at One Way Ventures

+ 432 more

Also worked at Meta282

Nat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGDaniel GrossMeta Superintelligence Labs; co-founder of NFDG and Safe SuperintelligenceTinaInvestments & Portfolio Services Team Member at Clear VenturesMike ArpaiaComputer scientist working on machine learning and data infrastructureKevin ColleranManaging Director at Slow VenturesJon ChuInvestor at Khosla Ventures

+ 276 more

Also worked at Istituto Italiano di Tecnologia1

Alessandro LeviPartner at M12 (Microsoft's Venture Fund)