cell-engineering
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Portal Biotechnologies
Portal Biotechnologies is a Watertown, Massachusetts cell-engineering platform company building tools that push complex cargo - mRNA, siRNA, CRISPR complexes, proteins - into living cells by squeezing them through microscopic holes in a silicon surface, rather than relying on viruses or chemistry. Founded in 2023 by Armon Sharei, the MIT-trained scientist behind SQZ Biotechnologies, Portal sells hardware and consumables to drug discovery and cell therapy labs instead of developing its own drugs. Its instruments are used across more than 100 customer sites, including many of the world's largest pharmaceutical companies, and the company has raised seed and follow-on funding plus a DARPA contract for portable, point-of-care cell manufacturing.
Armon Sharei
Armon Sharei is the founder and CEO of Portal Biotechnologies, a cell-engineering platform company in Watertown, Massachusetts that builds devices to push genetic and molecular cargo into living cells without killing them. He earned a chemical engineering PhD at MIT, where he invented the membrane-squeezing CellSqueeze technique, then founded SQZ Biotechnologies, raised more than $300M, struck a billion-dollar Roche partnership, and took the company public on the NYSE in 2020 before being ousted and watching it liquidate in 2024. After a sabbatical spent drawing comics about immune cells, he returned with Portal, choosing this time to sell tools rather than develop drugs, and has built a network of 100+ customers including most of the top 10 global pharma companies plus an $8M DARPA contract.
CellFE
CellFE is an Alameda, California biotechnology company building microfluidics-based, non-viral cell-engineering instruments and consumables. Its Ryva mechanoporation platform squeezes cells through microfluidic channels to transiently open their membranes and deliver gene-editing payloads (mRNA, CRISPR-RNP, DNA vectors) in under 10 milliseconds, aiming to preserve cell health and viability where viral vectors and electroporation fall short. The goal is to make lifesaving cell therapies such as CAR-T faster, cheaper, and more scalable to manufacture.
Multispan, Inc.
Multispan, Inc. is a Hayward, California biotech that builds the cell lines and assays drug hunters use to interrogate G protein-coupled receptors (GPCRs), the largest druggable target family in the human genome. Founded in 2004 by Helena Mancebo, the company has assembled one of the industry's largest libraries of clonally derived, GPCR-expressing stable cell lines - 600+ lines and 2,000+ ready-to-use reagents - and pairs them with custom assay development, compound profiling, antibody work, and CRISPR cell engineering. Its MULTISCREEN platform and proprietary HEx high-expression cell technology let pharmaceutical and academic teams screen, profile, and validate candidate drugs against receptors that are notoriously hard to express and measure.
Helena Mancebo
Helena Mancebo is the founder and CEO of Multispan, Inc., a Hayward, California biotech she has run for more than 20 years. She built a company around G protein-coupled receptors (GPCRs) - still among the most prolific class of drug targets - and grew it into a maker of the industry's largest collection of highly characterized human GPCR cell lines and 1,600-plus assay tools. A Yale-trained immunologist and geneticist, she pairs hard cell biology with a service obsession: next-day assay turnaround, native receptor pharmacology, and a culture built on empathy, integrity, and productivity. In 2023 Multispan's cell engineering and assay services were folded into Avantor's catalog; in 2025 she partnered with AI-automation firm Synfini to push GPCR drug discovery forward.
Kytopen
Kytopen is a Cambridge, Massachusetts biotech and MIT spinout building Flowfect, a non-viral, continuous-flow platform that uses fluid flow plus electric fields to deliver mRNA, DNA and CRISPR payloads into cells. The technology aims to engineer hundreds of billions of cells in minutes, removing a major bottleneck in discovering, developing and manufacturing advanced cell therapies like CAR-T and NK-cell treatments.
Yuyo Llamazares Vegh
Yuyo Llamazares Vegh is the CEO and Co-Founder of Stämm, a San Francisco-based biotech company reinventing biomanufacturing through miniaturized 3D-printed microfluidic bioreactors. A native of Argentina with a background in agricultural engineering and bioprocesses from the University of Buenos Aires, Yuyo co-founded Stämm in 2016 alongside his cousin Federico D'Alvia Vegh after spotting a fundamental gap between biology's potential and the outdated tools available to harness it. Stämm's platform - desktop-sized, modular, and scalable - is designed to make the production of biologics, cell therapies, and gene therapies accessible and repeatable at any scale. The company has raised over $17 million including a Series A led by Varana Capital with participation from Draper Associates and SOSV's IndieBio, and has attracted former Merck KGaA CEO Stefan Oschmann to its board. Yuyo was selected as an Endeavor Entrepreneur in 2023.