Rebel Fund

About

Rebel Fund is a seed venture capital fund, founded in 2019 and based in San Francisco, that invests exclusively in startups from Y Combinator. Its strategy relies on access to YC batches before Demo Day and a network of entrepreneur partners, including the co-founders of Reddit, Instacart, Cruise, Gusto, Scribd, and Rappi. The fund selects its opportunities with Rebel Theorem 5.0, its proprietary machine learning model powered by data on YC companies and founders. Rebel claims over 300 investments across various verticals, and its published portfolio includes Airbyte, Axle, Fly.io, Jeeves, and Corgi. In France, it entered the capital of CREW in 2023, then Leadbay and Bravi in 2026. Recent activity, new participations from the YC S26 batch, and the updated portfolio confirm that the fund remains in deployment. For a founder accepted to Y Combinator, Rebel is a specialized seed follow-on investor, with a selection based on data and access to the accelerator's alumni network.

Key facts

Type: Venture Capital
Stages: Pre-Seed, Seed
Headquarters: US
Offices: San Francisco, San Juan
Geographic focus: World
Founded: 2019

Track record

Total investments: 300

Notable investments

Airbyte (US), Axle (US), Fly.io (US), Jeeves (US), Corgi (US), Leadbay, Bravi

Website

Funds by stage

Other funds investing at the same stages, list by list.