Fundraising Fox

Joseph Metzinger

Founder

Founder at Stacksi

Los Angeles Metropolitan Area

FoundedStacksi Β· YC

About

Joseph Metzinger studied computer science at UC Berkeley. He previously served as co-founder and CTO at Mozio from 2011 to 2020 before co-founding Stacksi, where he currently holds the CTO role.

LinkedIn β†—X / Twitter β†—
Latest on 𝕏

Joseph Metzinger @josephmetzinger

25 Billion in bailouts and @AmericanAir can’t be bothered to give a shit. https://t.co/DeVX4chI9r

Nov 2, 2020 Β· β™₯ 2

Joseph Metzinger @josephmetzinger

I'm using Mozio to plan trips to and from the airport! http://t.co/KlJctKnDKC #mozio via @letsmozio

Feb 26, 2013 Β· β™₯ 6

Joseph Metzinger @josephmetzinger

I'm using Mozio to plan trips to and from the airport! http://t.co/JpKrGGom #mozio via @letsmozio

Feb 14, 2013 Β· β™₯ 1

Founder at StacksiYC W21

Intro paths

YC

Joseph went through Y Combinator (Winter 2021) β€” any YC alum in your network can reach them through the YC community.

β†’

In turn, Joseph can intro founders to Stacksi's investors below.

Stacksi's investors Β· 1

Y Combinator

Co-founders at Stacksi

EMEmre Murray Mangir
Emre Murray MangirFounder

Experience

  1. DrataSenior AI Engineering Managercurrent2026 β€” presentLos Angeles Metropolitan Area
  2. DrataAI Engineering Manager2025 β€” 2026Los Angeles Metropolitan Area
  3. Mozio GroupBoard Member / Advisorcurrent2020 β€” presentSan Francisco Bay Area
  4. Mozio GroupFounder & CTO2011 β€” 2020San Francisco Bay Area
  5. SafeBaseHead of Innovation (Acquired by Drata)2023 β€” 2025Los Angeles Metropolitan Area
  6. StacksiFounder & CTO (acquired by SafeBase)2020 β€” 2023Los Angeles Metropolitan Area

Education

  1. University of California, BerkeleyBachelor of Arts, Computer Science2007 β€” 2011
  2. Y Combinator

Skills & more

PythonJava12MySQL3CDjango1PerlAndroidRuby on Rails2Objective-C1Microsoft Office1LispAlgorithms6
+5 moreManagementStart-upsSocial MediaTestingLeadership

From Joseph'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

University of California, Berkeley mafia448

Also came through, then founded or led a company.

Ivan ZhouMolecular BiologyFounded Decagon +2Sean GroveFounded Linzumi +2Lucas HarringtonDoctor of Philosophy - PhDFounded Preventive +1Jinal JhaveriProfessional Certificate ProgramFounded SchoolMint +1Jacob HookerPh.D.Founded Sensorium Therapeutics +1Justin HughesBAFounded Revolution RE +1

+ 441 more

Safebase mafia2

Also came through, then founded or led a company.

Olivier PorteSeed InvestorFounded Alpha Vantage

Same school

Also attended University of California, Berkeley1,324

Byron DeeterPartner at Bessemer Venture PartnersTrevor OelschigInvestment Team at General CatalystBrendan Bulik-SullivanInvestor at GV (Google Ventures)Glen AndersonPartner at Monta Vista CapitalAnthony LinHead of Intel Capital, Corporate Vice President at Intel CapitalScott ShawChief of Staff at Intel Capital

+ 1,318 more

Also attended Y Combinator2,000

Leo LuInvestor at Foundation CapitalMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesVictor SantosVictor Scout at One Way VenturesSwapnil JainCEO, Observe.AI at EMERGENT VENTURESChase AdamPartner at Very Serious Ventures

+ 1,994 more

Shared employers

Also worked at Drata22

Houman HaghighiPartner, Business & Corporate Development at Menlo VenturesSydney SloanChief Marketing Officer at Scale Venture PartnersGlenn SolomonInvestor at GGV CapitalOren YungerInvestor at GGV CapitalJake SeidGeneral Partner at Ballistic VenturesChrisInvestor at Perceptive Ventures Management Company, Llc

+ 16 more

Also worked at Mozio Group1

Emre Murray MangirFounder at Stacksi

Also worked at SafeBase11

Dave LuFounder at Hyphen CapitalPriya SaiprasadInvestment Advisory Council at Neythri Futures FundPriya SaiprasadGeneral Partner at Touring CapitalEvan WijayaPrincipal at Touring CapitalHilarie Koplow-McAdamsVenture Partner at New Enterprise Associates (NEA)Kyle McNultyInvestor at In-Q-Tel

+ 5 more

Also worked at Stacksi1

Emre Murray MangirFounder at Stacksi