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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.