Gene Therapy Startups funded by Y Combinator (YC) 2026

FinalDose is building the first programmable drug - a single smart drug molecule that you can insert any diseased genetic code and it can search and destroy cells upon DNA recognition. Unlocking 80% of undruggable targets today. Starting with all cancers.

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.

Kopra Bio makes genetically engineered viruses that teach your immune system to kill cancer using tech we developed at UCSF. We’re making the next Keytruda ($25B/yr cancer drug blockbuster) starting with the most aggressive form of brain cancer, glioblastoma. In the most challenging brain cancer model, we improve survival from 0% with the current FDA approved treatment to 90% with our treatment.

ParcelBio is engineering a new class of mRNA medicines designed to deliver unprecedented potency and durability. Its proprietary APEXm™ platform uses novel RNA domains to enhance protein expression and extend activity, enabling therapies that reach the thresholds required for meaningful, and potentially curative, clinical outcomes. The company is advancing programs in autoimmune disease, oncology, and encoded protein therapeutics.

Cell and gene therapy promises to one day cure any disease; Modulari-T’s Platform produces the tools to fulfill that promise. Modulari-T has designed a new family of synthetic genes that can reprogram cells to better sense their environment and modify their behavior accordingly. This can be used to engineer immune cells to efficiently recognize and kill cancer cells or to create stem cells able to regenerate any tissue. Modulari-T looks to expand its technology to reach every area of cell therapy and become the platform of reference for cell engineering.

Nephrogen is a Stanford biotech spin-out developing curative genetic medicines for kidney and pancreatic diseases. Kidney disease alone affects 1 in 7 Americans, and neither indication has any approved gene-based therapies. Nephrogen's underlying platform combines AI and high-throughput screening to engineer safer, more efficient, and less expensive gene delivery vehicles for reaching the kidney and pancreas, and has attracted non-dilutive funding from seven major pharmaceutical companies including Merck KGaA, Novartis, and Bristol Myers Squibb.

We have developed an AI platform enabling to accelerate the discovery and the design of genomic therapies such as Cell Therapies, RNA Therapies and DNA Therapies.

Andson Biotech helps pharmaceutical companies measure difficult to detect chemicals that they need to measure while developing and manufacturing drugs like cell-therapies or biologics. Drug companies want to use our technologies to get fast and accurate chemical measurements they do thousands of times per day for drug development and quality control.

The future of medicine is taking shape, but scaling it remains a challenge. Some of the biggest breakthroughs in next generation therapies are being held back by manufacturing constraints. The science is moving fast, but the infrastructure is still catching up. Our VectorSelect platform is designed to unlock the scale these therapies need to survive. We combine massively parallelized screens with computational insights to engineer high yield cell lines and production technologies — accelerating the manufacturing of advanced therapies from the inside out.

Stanford-patented essential drug platform unlocks the healthspan, which is limited by short telomeres. Extends mouse lifespan by equivalent of 10 years in humans. Reverses 5-10 years of telomere shortening with one dose in one day. Preclinical efficacy in 4 organ systems including immune system. Entering clinical stage. CEO is Subject #1 in longevity trial. 50+ granted patents, 7 patent families. FDA INTERACT cleared. Raising $10M seed extension ($2M+ wired) to fund 3 investigator-initiated trials. Readouts in Q3 2027. $6.8B in comparable mRNA-LNP M&A in last 12 months.

Sixfold is focused on the commercialisation of its patented drug delivery systems for RNA therapeutics such as siRNAs for gene silencing and mRNAs for gene expression.

Intracellular delivery is the most problematic step in T cell immunotherapy discovery, development and manufacturing. Indee Labs is developing a non-viral intracellular delivery system based on microfluidic vortex shedding (µVS) to rapidly deliver nucleic acids, proteins and gene editing complexes to patient and donor T cells with minimal perturbation.