Externa

Cohort 2026

Unlocking synthetic amino acids at scale to create next-gen therapeutics.

We expand biology's alphabet at scale.

What is the problem?

Biologics have revolutionized medicine, but they remain locked inside nature's 20-amino-acid limit. Exploring beyond it requires testing each synthetic amino acid individually—a process so slow it has stifled the field for decades.

What is their solution?

We break that bottleneck. Our platform discovers and validates tens of novel synthetic amino acids per month, then incorporates the best into ML-designed therapeutics.