Fundraising Fox

Leonard Platzer

Founder

Founder at Deasy Labs

New York, New York, United States

FoundedDeasy Labs · YC

About

Leonard Platzer is a co-founder of Deasy Labs, a metadata engine platform for search applications. He has held software engineering roles at QuantumBlack in machine learning and data quality, Amazon, and Mercedes-Benz, and previously worked at a chatbot startup; he holds a bachelor's degree from the National University of Singapore and a graduate degree from UWC Mostar.

Founder at Deasy LabsYC S23

Intro paths

YC

Leonard went through Y Combinator (Summer 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 Deasy Labs's batch and knows the company first-hand. YC profile ↗

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In turn, Leonard can intro founders to Deasy Labs's investors below.

Deasy Labs's investors · 5

General CatalystSan Francisco · $30M checks · since 2023J12 Venturessince 2023Rebel FundSan Francisco · $100K – $5M checks · since 2023RTP GlobalNew York · $1M – $15M checks · since 2023Y CombinatorSan Francisco · $500K checks · since 2023

Co-founders at Deasy Labs

RGReece Griffiths
Reece GriffithsFounder
MPMikko Peiponen
Mikko PeiponenFounder

Experience

  1. CollibraDirector of Product Managementcurrent2026 — presentNew York, United States
  2. CollibraDirector of Engineering2025 — 2026New York, United States
  3. Deasy Labs (acquired by Collibra)Co-founder | CTO2023 — 2025New York, United States
  4. QuantumBlack, AI by McKinseySoftware Engineer, Machine Learning - QuantumBlack Labs2022 — 2023Berlin, Germany
  5. QuantumBlack, AI by McKinseyFellow Intern2022
  6. McKinsey & CompanySoftware Engineer, Machine Learning - QuantumBlack Labs2022 — 2023Berlin, Germany
  7. McKinsey & CompanyFellow Intern2022Berlin, Germany
  8. AmazonEngineering Intern2021Munich, Bavaria, Germany
  9. Mercedes-Benz AGAdvanced Analytics Intern2021Stuttgart, Baden-Württemberg, Germany
  10. e-bot7 - AI for Customer ServiceSoftware Engineer2020Munich, Bavaria, Germany
  11. Reliance Capital | Reliance GroupFinance Intern2018Mumbai, Maharashtra, India

Skills & more

Python (Programming Language)4Amazon Web Services (AWS)1Microsoft Azure2C (Programming Language)React.jsGitSQLNoSQLR (Programming Language)REST APIsKerasTensorFlow
+12 morePandas (Software)PyTorchKotlinPySparkMongoDBVisual Basic for Applications (VBA)SearchProduct ManagementMachine LearningOntologiesKnowledge GraphsUnstructured Data

Languages English · German

  • Machine Learning with Tree-Based Models — DataCamp
  • Software Engineering Virtual Experience — JPMorganChase

From Leonard's professional profile.

Frequently asked questions

Who is Leonard Platzer?
Leonard Platzer is a co-founder of Deasy Labs, a metadata engine platform for search applications. He has held software engineering roles at QuantumBlack in machine learning and data quality, Amazon, and Mercedes-Benz, and previously worked at a chatbot startup; he holds a bachelor's degree from the National University of Singapore and a graduate degree from UWC Mostar.
Where does Leonard Platzer work?
Leonard Platzer is Founder of Deasy Labs.
What companies did Leonard Platzer found?
Leonard Platzer founded Deasy Labs.
Where did Leonard Platzer go to school?
Leonard Platzer studied at Y Combinator (Founder (S23)); National University of Singapore (Bachelor's Degree); United World College Mostar (International Baccalaureate).

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

McKinsey & Company mafia337

Also came through, then founded or led a company.

Elad GilConsultantFounded Brain Co.Tony XuBusiness AnalystFounded DoorDashAlexandre ProtAssociateFounded Smartven +1Inaki BerenguerAssociateFounded InfiniteWatch +2Ryan XueManagement ConsultantFounded Andco +2Max AhrensFellow InternFounded Maihem +2

+ 330 more

National University of Singapore mafia88

Also came through, then founded or led a company.

Aihui OngB.Sc.Founded Love With Food +2Mike MoradiLeadershipFounded Southwest Nanotechnologies +1Lloyd LeeExchange StudentFounded Hyperithm +1Sivamani VarunBachelor of Engineering - BEFounded Keygraph +1Victor Liew Jia HaoBachelor of Computing (Honours)Founded StraitsX +1Kushal PillayMaster's degreeFounded Powerhouse Ai +1

+ 81 more

Collibra mafia3

Also came through, then founded or led a company.

Reece GriffithsField CTOFounded Deasy LabsMikko PeiponenPrincipal Systems ArchitectFounded Deasy Labs

Same school

Also attended Y Combinator2,000

Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital

+ 1,994 more

Also attended National University of Singapore332

Justin HallPartner at Golden Gate VenturesMahati SridharPartner, Rise of the Rest at RevolutionCeline XiaoInvestor at DN CapitalSofia DahouneInvestor at DaphniYi Min LohInvestment Associate at Burda Principal InvestmentsSean LooInvestment Analyst at Burda Principal Investments

+ 326 more

Also attended United World College Mostar2

Amar SehicInvestor at Entrepreneurs Roundtable Accelerator (ERA)Jerry HuangFounder at DeepAware AI (Robotics Center of Silicon Valley)

Shared employers

Also worked at Collibra12

Jan HammerInvestor at Index VenturesDerek ZanuttoInvestor at CapitalGChrisInvestor at Perceptive Ventures Management Company, LlcDharmesh ThakkerGeneral Partner at Battery VenturesPatrick PolakCo-Founder and Managing Partner at NewionNorman FioreGeneral Partner at Dawn Capital LLP

+ 6 more

Also worked at McKinsey & Company1,549

Elad GilSolo general partner investing through Gil CapitalJim BreyerFounder & CEO of Breyer CapitalAnn Miura-KoCo-founding Partner at FloodgateJeremy LiewPartner at Lightspeed Venture PartnersMike SpeiserManaging Director at Sutter Hill VenturesJeremy LevinePartner at Bessemer Venture Partners

+ 1,543 more

Also worked at Amazon645

Apoorva MehtaFounder of Instacart; founder of Cloud Health SystemsBinny BansalCo-founder of Flipkart; co-founder of PhonePe and OppDoorBrad PorterFounder & CEO of Collaborative RoboticsJane MooneyCo-founder & VP, Strategy and Finance at Collaborative RoboticsNick FrosstCo-founder of CohereDave MunichielloInvestor at GV (Google Ventures)

+ 639 more

Also worked at Mercedes-Benz AG59

Olga ChumanskayaInvestor at Khosla VenturesMichal NatoraSenior Investment Director - Industrial IT & Robotics at Emerald Technology Ventures AgAndrew OgawaManaging Partner and Founder at Quest Venture PartnersThomas MeierPartner, Head of Resilience in Energy & Resources Investments at Verve VenturesCarolin FunkPartner at Blue Bear Capital PartnersAdolfo BlascoPartner at Nazca

+ 53 more