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Rex joins Y Combinator (S26)

Rex is part of the Y Combinator Summer 2026 batch. We're building the AI operations partner for enterprise order to cash.

Lewis Blackwood and Merlin Kafka outside the Y Combinator office in Mountain View

Rex is now part of Y Combinator's Summer 2026 batch.

Y Combinator is the accelerator behind Airbnb, Stripe, Coinbase, and DoorDash, and has funded more than 4,000 startups since 2005.

We're building the AI operations partner for enterprise order to cash.

Forbes later featured Rex in Meet the YC startups betting on what comes next.