Investing Profile

Paul Buchheit

VCInvestorAngel
Managing Partner at Y Combinator
ycombinator.com/people/Mountain View, California
Photo of Paul Buchheit, Managing Partner at Y Combinator

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Y Combinator Managing Partner
$150K - $150K
$150K
187
CompanyStageDateRound SizeTotal Raised
Weave
Series AJul 2026$14M
$220M
Co-investors: Brian Feinstein (Bessemer Venture Partners), Garry Tan (Initialized Capital), Joe Montana (Liquid 2 Ventures), Matt Garratt (CRV), Darian Shirazi (Gradient Ventures), Wei Guo (UpHonest Capital), Jared Friedman (Y Combinator), Nimay Mehta (Lead Edge Capital), Edward Lando (Biowear), Joel Dudley (Innovation Endeavors), Christine Aylward (Magnetic Ventures), Ronny Conway (A Capital), Eugene Zhang (Moving Capital), Blake Modersitzki (Pelion Venture Partners), John Mayfield (Album VC), David Silverman (Robertson Stephens), Geoff Ralston (Y Combinator), Bryan Rosenblatt (Craft Ventures), Daniel Curran (FundersClub), Ed Roman (Hack VC), Dalton Caldwell (Standard Capital), Ronny Conway, Dmitry Dakhnovsky
BuildForever
SeedApr 2026$10M
$10M
Co-investors: Gokul Rajaram (gokulrajaram.com), Ben Silbermann (Pinterest), Elad Gil (Gil Capital / Gil & Co), Scott Belsky (A24), Shishir Mehrotra, Guillermo Rauch, Fidji Simo
Concourse
Series AJan 2026$12M
$12M
Co-investors: Dalton Caldwell (Standard Capital)
Sim
Series ANov 2025$7M
$7.5M
Co-investors: Dalton Caldwell (Standard Capital), Ali Rowghani (Y Combinator), Kulveer Taggar (Angel investor), Chris Howard (Fuel Capital), Paul Graham
SiPhox Health
SeedJul 2023$10M
$33M
Co-investors: Srini Ananth (Intel Capital), Bob Lee (MobileCoin), Vishal Rao (How Old Is Vishal?), Chris Sklarin (Castor Ventures), Evan Cheng (Mysten Labs), Balaji Srinivasan
Perplexity
Series AMar 2023$26M
$1.3B
Co-investors: Somesh Dash (IVP), Cack Wilhelm (IVP), Garry Tan (Initialized Capital), Talia Goldberg (Bessemer Venture Partners), Shravan Narayen (IVP), Yann LeCun (AMI - Advanced Machine Intelligence), Pieter Abbeel (AIX Ventures), Nat Friedman (Self-employed), Elad Gil (Gil Capital / Gil & Co), Peter Sonsini (The Estée Lauder Companies Inc. New Incubation Ventures), Naval Ravikant (Sm4rt Predictive Systems), Eric Schmidt (Innovation Endeavors), Sameer Gandhi (Accel Partners), Auren Hoffman (SafeGraph), Joshua Müller (Headline (formerly e.ventures)), Stanley Druckenmiller (Quantum Wave Fund), Daniel Gross (Various), Jim Scheinman (Maven Ventures), Sara Thomas Deshpande (Maven Ventures), Balaji Srinivasan, Dylan Field, Jeff Bezos, Guillermo Rauch, Tobias Lutke, Bob Muglia, Shane Neman, Amjad Masad, Mattia Astori
Character.ai
SeedJan 2023$80K
$150M
Co-investors: Sarah Wang (Andreessen Horowitz), Nat Friedman (Self-employed), Elad Gil (Gil Capital / Gil & Co)
Cityfurnish
Series ANov 2022$3M
Series AJun 2019$5M
$8.2M
Co-investors: Kenneth Ballenegger (Oyster Ventures), Steve Chen
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