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Uncommon Therapeutics

Uncommon Therapeutics is a YC Winter 2025 (W25) company. Based in San Francisco, CA, USA. Team of 2.

  • Gene Therapy
  • CRISPR
  • Biotechnology

About Uncommon Therapeutics

GPAgent's own fund-neutral profile, written from public information. Updated Oct 5, 2026.

Summary

Uncommon Therapeutics develops therapeutics targeting the root cause of rare genetic diseases, starting with Rett Syndrome, a neurodevelopmental condition affecting one in ten thousand girls. The company applies a polytherapy strategy, validating multiple drug modalities in disease-relevant models to advance a pipeline that individually improves patient outcomes and in combination aims to deliver a cure. This work replaces the standard single-target approach with a coordinated multi-drug design built around deep, firsthand disease expertise.

From the Y Combinator listing

How Uncommon Therapeutics describes itself in Y Combinator's public directory. Original listing (opens in a new tab)

A Disease Focused Biotech, Building Multiple Billion Dollar Drugs

Our founder Noah, an experienced tech entrepreneur, was directly impacted by a severe genetic disease when his daughter was diagnosed with Rett Syndrome, a disease that afflicts 1 in 10,000 girls. Using an innovative polytherapy strategy, we’ve successfully improved her quality of life, and have designed new therapeutics that each could be worth billions and together could deliver a cure.

Facts

Industry
Healthcare / Healthcare -> Therapeutics
Location
San Francisco, CA, USA
Team size
2
Status
Active
Stage
Early

Founders (2)

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