Parcel Biosciences

Elevated mRNA for transformative medicines.

San Francisco, United States · Founded 2023 · $13.5M raised

Employees
1–10
Founded
2023
Business Model
B2B
Total Funding
$13.5M
Last Round
$13.0M SeedMay 2026
Rounds
2

About

ParcelBio is a San Francisco-based biotech startup founded in 2023 by former Orbital Therapeutics scientists, developing a new class of mRNA medicines designed to deliver unprecedented potency and durability. Its proprietary APEXm™ platform engineers mRNA to drive significantly higher and more sustained protein expression across diverse cell types, enabling therapeutic applications in autoimmune disease (in vivo CAR-T for pathogenic B cell depletion), oncology, and therapeutic protein delivery. Backed by Breyer Capital, General Catalyst, Y Combinator, and other life science investors.

Summary

Parcel Biosciences is a Biotech company based in San Francisco, United States, founded in 2023. It has raised $13.5M in total across 2 rounds, most recently a $13.0M Seed round in May 2026. Investors include Y Combinator, Breyer Capital and General Catalyst.

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Funding History

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