About
Alex Chantavy is co-founder and CEO of SubImage. Previously, he was a staff engineer at Lyft where he developed an open source security graph tool, and a security engineer on Microsoft's Red Team focused on cloud security. He has also held positions in security and infrastructure roles at the NSA.
Co-founder & CEO at SubImageYC W25
Intro paths
YC
Alex went through Y Combinator (Winter 2025) β any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Gustaf Alstromer β the partner who ran SubImage's batch and knows the company first-hand. YC profile β
β
In turn, Alex can intro founders to SubImage's investors below.
SubImage's investors Β· 2
Co-founders at SubImage
KS
Kunaal SikkaCo-founder & President
Experience
- SubImageCo-founder & CEOcurrent2024 β presentSan Francisco Bay Area
- LyftStaff Software Engineer2019 β 2024San Francisco Bay Area
- University of WashingtonInstructor2019 β 2020
- MicrosoftSenior Security Software Engineer2016 β 2018Greater Seattle Area
- National Security AgencyCapabilities Development Specialist2014 β 2015Washington D.C. Metro Area
- National Security AgencyComputer Systems Analyst2011 β 2014Hawaii
Skills & more
Software Engineering6Malware Analysis7Reverse Engineering7Windows Internals3Computer Science11Web Development9Citrix XenDesktop4Algorithms4Networking3Programming6Kernel Debugging1Penetration Testing1
+11 more
CAssembly LanguageComputer SecurityLinuxJavaPythonJavaScriptPowershellVMware ESXMySQLDatabasesLanguages Chinese Β· English
From Alex's professional profile.
Frequently asked questions
- Who is Alex Chantavy?
- Alex Chantavy is co-founder and CEO of SubImage. Previously, he was a staff engineer at Lyft where he developed an open source security graph tool, and a security engineer on Microsoft's Red Team focused on cloud security. He has also held positions in security and infrastructure roles at the NSA.
- Where does Alex Chantavy work?
- Alex Chantavy is Co-founder & CEO of SubImage.
- What companies did Alex Chantavy found?
- Alex Chantavy founded SubImage.
- Where did Alex Chantavy go to school?
- Alex Chantavy studied at University of Washington (Master of Science - MS, Computer Science); University of Hawaii at Manoa (Bachelor of Science (B.S.), Computer Science); Iolani School.
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
University of Washington mafia114
Also came through, then founded or led a company.
Arvind JainMastersFounded GleanJane MooneyBachelor of Business Administration - BBAFounded Collaborative RoboticsMatthew ScholzBSFounded Oisin Biotechnologies +3Emmett ShearFounded Softmax +2Emin Gun SirerPh.D.Founded Avalanche +2Sara VaezyMPHFounded Dexcare +1
+ 107 more
University of Hawaii at Manoa mafia5
Also came through, then founded or led a company.
Iolani School mafia3
Also came through, then founded or led a company.
Same school
Also attended University of Washington277
Andrew ChenGeneral Partner at Andreessen HorowitzArvind JainFounder & CEO of GleanJane MooneyCo-founder & VP, Strategy and Finance at Collaborative RoboticsVictoria TreygerGeneral Partner at Felicis VenturesAndrewAdvisor at Clear VenturesJoe HorsmanInvestor at Madrona Venture Group
+ 271 more
Also attended University of Hawaii at Manoa29
Raymond CheResearch Associate at Archer Capital GroupShirish DeodharInvestor at Pentathlon VenturesLewis PinaultChief Scientist at Airbus VenturesDr. Virginia ChaVenture Partner at iGlobe PartnersLexi NovitskeGeneral Partner at Norrsken22Timothy YoungCo-Founder and General Partner at Eniac Ventures
+ 23 more
Shared employers
Also worked at SubImage1
Also worked at Lyft96
Navin ChaddhaManaging Partner at MayfieldLogan GreenCo-founder of LyftJohn ZimmerCo-founder of LyftDarcy YeeMarketing and Communications at Menlo VenturesPierre-Eric LeiboviciInvestor at DaphniManish GuptaInvestor at IVP (Institutional Venture Partners)
+ 90 more
Also worked at University of Washington95
Joe HorsmanInvestor at Madrona Venture GroupMike FridgenVenture Partner at Madrona Venture GroupSid ShenaiVenture partner at Madrona and co-founder and CEO of Proof DiagnosticsPaul JennyBoard Chair at CincyTechJason PrestonInvestor at Alsop Louie PartnersElliot HershbergScientist, Writer, and Investor on a mission to accelerate The Century of Biology
+ 89 more
Also worked at Microsoft1,188
Reid HoffmanCo-founder of LinkedIn; Partner at GreylockGarry TanPresident & CEO of Y CombinatorNat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGKai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIBill GatesCo-founder of Microsoft; Chair of the Gates FoundationMike KriegerCo-founder of Instagram; Chief Product Officer at Anthropic
+ 1,182 more