06 Apr 2026
20m

This Startup Wants To Catch Cancer Before It Spreads

Podcast cover

Y Combinator Startup Podcast

BillionToOne's journey from a prenatal genetic testing startup to a multi-billion dollar company is explored, highlighting their innovative approach to DNA diagnostics. The company's co-founders, Oguzhan Atay and David Tsao, discuss their unique technology that uses synthetic DNA to reduce noise in blood samples, enabling the detection of rare conditions like sickle cell disease and early-stage cancers. This method overcomes the limitations of traditional genetic tests that amplify background noise, obscuring crucial signals. BillionToOne's strategic expansion from prenatal testing to late-stage and early-stage cancer detection, akin to Tesla's product strategy, is also examined. A patient case study illustrates the impact of their cancer test, where immunotherapy, guided by BillionToOne's findings, led to a significant remission in a metastatic colorectal cancer patient.

Outlines

Part 1: Introduction, Core Technology

Part 2: Market Entry, Scaling Operations

Part 3: Clinical Impact, Team Structure

Part 4: Strategic Roadmap, Future Vision

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