Investing Profile

Michael Seibel

VCInvestorAngel
Partner Emeritus at Y Combinator
michaelseibel.comSan Francisco, California
Photo of Michael Seibel, Partner at Y Combinator
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Networks Michael is a member of
NewCo Network
1586 CONNECTIONS
NewCo Network
1586 CONNECTIONS
Top-Patents Network
1030 CONNECTIONS
Top-Patents Network
1030 CONNECTIONS
Center for Rural Health Leadership Network
433 CONNECTIONS

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Current Investing Position
Y Combinator Partner
Investment Range
$150K - $150K
Sweet Spot
$150K
Investments On Record
201

Michael Seibel is on these Sector & Stage Rankings

Michael Seibel's Investments On Record (160)

CompanyStageDateRound SizeTotal Raised
Simple AI
SeedFeb 2026$14M
Pre SeedSep 2024$500K
$15M
Legion Health
SeedJan 2026
Pre SeedJun 2021$2M
$2.1M
Co-investors: Tim Brady (Y Combinator), John Diaz (Stone Mountain Ventures)
FINNY
Series ADec 2025$17M
Pre SeedSep 2024$500K
$22M
Co-investors: Andre Charoo (iNovia Capital), Jason Wenk (Matterscale Ventures), Nick Beim (Venrock)
Reditus Space
SeedDec 2025$7M
Pre SeedNov 2024
$7M
Co-investors: Ryan Merket (Jude AI)
Cuckoo
SeedNov 2025$2M
Pre SeedJan 2025$500K
$8.5M
Co-investors: Gareth Jefferies (RTP Global), Wally Wang (Scale Asia Ventures)
Mecha Health
SeedNov 2025$4M
SeedMar 2025
$4M
FleetWorks Technology
Series AOct 2025$17M
Pre SeedSep 2023$500K
$18M
Co-investors: Bill Trenchard (First Round Capital)
DianaHR
SeedSep 2025$4M
Pre SeedFeb 2024$500K
$4.5M
Co-investors: Justin Kan (Goat Capital), Mike Miller (Liquid 2 Ventures), Jonathan Ehrlich (Foundation Capital), Kevin Mahaffey (Lookout), Yuri Sagalov (10100), Immad Akhund (Y Combinator)

Michael Seibel's Experience

Partner Emeritus Y Combinator2025 - Present
CEO IT CRUX Mobile Apps SolutionsPresent
Finance Director IT CRUX Mobile Apps SolutionsPresent
Partner Y Combinator2014 - 2025
Part-time Partner Y Combinator2013 - 2014
CEO Socialcam2011 - 2014
CEO Top-Patents2011 - 2014
CEO NewCo2011 - 2014
CEO Sm4rt Predictive Systems2011 - 2014
CEO Center for Rural Health Leadership2011 - 2014
CEO Minttown2011 - 2014
CEO Mfume for US Senate 20062011 - 2014
CEO Justin.tv2006 - 2011
CEO Twitch2006 - 2011
Finance Director Mfume for US Senate 20062005 - 2006
Finance Director Top-Patents2005 - 2006
Finance Director NewCo2005 - 2006
Finance Director Sm4rt Predictive Systems2005 - 2006
Finance Director Center for Rural Health Leadership2005 - 2006
Finance Director Minttown2005 - 2006

Michael Seibel's Education

Yale University BA Political Science