Investing Profile

Michael Seibel

VCInvestorAngel
Managing Director and Group Partner at Y Combinator
michaelseibel.comSan Francisco, California
Photo of Michael Seibel, Managing Director at Y Combinator
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Networks Michael is a member of
Yale University Network
127 CONNECTIONS
Y Combinator Network
37 CONNECTIONS
Y Combinator Network
37 CONNECTIONS

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Current Investing Position
Y Combinator Managing Director
Investment Range
$150K - $150K
Sweet Spot
$150K
Investments On Record
184

Michael Seibel is on these Sector & Stage Rankings

Michael Seibel's Investments On Record (156)

CompanyStageDateRound SizeTotal Raised
Axle Health
Series AMay 2025$10M
Pre SeedMar 2021$200K
$25M
Co-investors: Vivien Ho (Pear VC), Carl Byers (F-Prime Capital Partners), Gustaf Alströmer (Y Combinator), Eric Ong (Lightbank), Ralph Gootee, Nikhil Krishnan
Arena
Series BApr 2025$30M
Series AAug 2022$32M
$64M
Co-investors: Peter Thiel (Founders Fund), Romero Rodrigues (Headline (formerly e.ventures)), Colin Anderson (Friends & Family Capital), David Petraeus
Finbar
Pre SeedMar 2025$500K
$500K
Mesh
SeedMar 2025
$150M
Co-investors: Ullas Naik (Streamlined Ventures), Ruth Foxe Blader (Anthemis Group), Charlie Noyes (Paradigm), Anamitra Banerji (Afore Capital), Cindy Bi (CapitalX), Ramzi Rafih (No Label Ventures), Niall McEvoy (Elkstone), Will Smith (Dreamers VC), Neeraj Arora (Venture Highway), Rajan Anandan (Peak XV Partners (formerly Sequoia Capital India & SEA)), Peter Bordes (Trajectory Ventures), Elaine Russell (Greycroft), Madhur Makkar (RTP Global), Hemant Bhardwaj (Taurus Ventures), Alison Engel, Viral Bajaria, Sahin Boydas, Ilya Kondrashov, Gokul Rajaram, Ali Moiz, Arash Ferdowsi, Mike Giampapa, Munish Varma, Amman Bhasin
a0.dev
Pre SeedMar 2025$500K
$500K
Co-investors: Ryan Merket (Comal Ventures)
Permitify
Pre SeedMar 2025$500K
$500K
Retrofit
Pre SeedMar 2025$500K
$12M
Co-investors: Jai Shekhawat (Chicago Ventures), Stuart Larkins (Chicago Ventures), Dan Malven (4490 Ventures), Brian Spaly (Brand Foundry Ventures)
Sift Dev
Pre SeedMar 2025$500K
$500K

Michael Seibel's Experience

Partner Y Combinator2014 - Present
Part-time Partner Y Combinator2013 - 2014
CEO Socialcam2011 - 2014
CEO Justin.tv2006 - 2011
Finance Director Mfume for US Senate 20062005 - 2006

Michael Seibel's Education

Yale University BA Political Science