Tessera Therapeutics logo

Tessera Therapeutics

Emerging

Tessera Therapeutics is developing Gene Writing technology to insert large therapeutic sequences directly into the genome without double-strand DNA breaks; raised $230M+ including a $100M Series B;

Best for: Gene Writing Genomic Medicine PlatformEmerging, rapid growth
Life Sciences & BioTechGene Writing Genomic Medicine PlatformWebsiteUpdated May 2026

Company Overview

About Tessera Therapeutics

Tessera Therapeutics is a genomic medicine company founded in 2018 by Jacob Rubens, Brian Goodman, and colleagues at Flagship Pioneering (the life sciences venture creation firm behind Moderna) and headquartered in Cambridge, Massachusetts. The company is pioneering Gene Writing — a platform technology that uses mobile genetic elements (specifically RNA-guided integrases derived from retrotransposons) to write large DNA sequences directly into the human genome at targeted sites, without requiring double-strand DNA breaks. This approach is designed to overcome key limitations of first-generation gene editing technologies: CRISPR-Cas9 creates double-strand breaks that can introduce unintended mutations, and current gene editing tools are largely limited to small sequence corrections or knockouts rather than full gene insertions.

Business Model & Competitive Advantage

Gene Writing has the potential to address genetic diseases that require insertion of complete functional gene sequences — conditions such as hemoglobinopathies, metabolic liver diseases, and other monogenic disorders where gene correction rather than disruption is required for a therapeutic effect. Tessera raised $230M+ in total funding including a $100M Series B led by GV (Google''s life sciences venture arm), Northpond Ventures, and Foresite Capital, with additional investors including Casdin Capital. The company has published peer-reviewed research on Gene Writing in Nature and other journals, validating its scientific approach to a preclinical stage.

Competitive Landscape 2025–2026

Tessera competes in the next-generation genomic medicine space alongside Arbor Biotechnologies, Prime Medicine (which uses Prime Editing, another approach to precision genome editing without double-strand breaks), and Beam Therapeutics (base editing). Each company represents a distinct technological approach to writing DNA sequence changes into the genome more precisely than CRISPR. Tessera''s differentiation is the size of DNA it can write — Gene Writing can potentially insert sequences kilobases in length, whereas base editing and prime editing are optimized for smaller corrections. This positions Tessera for diseases that require full gene replacement rather than point mutation correction.

Founded
2018
Headquarters
Cambridge, Massachusetts
Curated content • Fact-checked and verified

Key Differentiators

Emerging Innovator

Tessera Therapeutics is an emerging player bringing innovative solutions to the Life Sciences & BioTech market.

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