Stage FocusSeed
GeographyGlobal
TypeVC
Last Activity2026
Industry Focus
Industries
AISpaceBiotechMedtechBlockchain
Technical BenchStrong
Investor TypeGeneralist
ExposureSome DeepTech Investments
Bio
Rebel Fund is a San Francisco-based venture fund founded in 2019 by Y Combinator alumni, investing exclusively in seed-stage Y Combinator startups. Its investing partners have co-founded companies including Reddit, Instacart, Cruise, Gusto, Scribd, and Rappi, collectively valued at over $100 billion, and the firm uses a proprietary machine-learning model, Rebel Theorem, to screen and select invest...
Notable Investments
A
AirbyteA
AlbedoA
Array LabsA
Algen BiotechnologiesA
Alga BiosciencesA
Andromeda SurgicalA
Armilla AIA
AxleA
AnchorA
AristSimilar Funds
Tribe Capital
Menlo Park, United States
GeneralistAIBlockchainSpaceSeedSeries A
Village Global
San Francisco, United States
GeneralistAIAerospaceDefensePre-SeedSeed
VU Venture Partners
San Francisco, United States
GeneralistAIRoboticsSpacePre-SeedSeed
Bessemer Venture Partners
Menlo Park, United States
GeneralistAISpaceClimate TechSeedSeries A
Breyer Capital
Menlo Park, United States
GeneralistAIQuantumBiotechSeedSeries B+
CV
Castor Ventures
Manchester, United States
GeneralistAISpaceAerospacePre-SeedSeed