
Parallel Bio is a biotechnology company that has developed the first platform replicating the human immune system in a dish for drug discovery and development. Their platform uses immune…

Parallel Bio is a biotechnology company that has developed the first platform replicating the human immune system in a dish for drug discovery and development. Their platform uses immune…
Founded: 2021
Headquarters: Cambridge, Massachusetts
Core technology: Human immune organoids + AI and automation
Total disclosed funding: ≈ $25.6M (across pre-seed, seed, Series A)
Notable investors: Y Combinator; AIX Ventures; Refactor; Jeff Dean
Preclinical prediction for immunotherapy discovery; reducing drug failure rates due to poor translatability from animal models to humans.
2021
Biotechnology
Pre-seed round recorded in 2021
Seed round recorded Dec 20, 2022
21000000
Series A reported June 2025 (~$21M)
“Includes participation from Y Combinator and a mix of venture firms and individual/backing investors (examples reported: AIX Ventures, Refactor, Jeff Dean)”
At Parallel Bio, we are leveraging the human immune system to unlock safer, more effective drugs. We believe immunotherapies are the future of medicine, but their discovery is hindered by outdated models that fail to capture the complexity of the human immune system.
Our platform overcomes these challenges by combining best-in-class human immune organoids with massive scale and advanced computational methods, including AI and machine learning. This allows us to generate unprecedented, population-scale insights into human health and disease.
We can rapidly discover new drugs that we know will work in patients from the start and understand how they will perform across an entire population—something not possible with today's technology. This knowledge will allow us to engineer therapies that will work for as many people as possible, ensuring a safe and effective cure for everyone.
We are a fast-paced, venture-backed company at a pivotal moment of growth. Join us on our journey as we create new tools to push the boundaries of what is possible.
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Role Overview You will design and qualify the immunological assays that determine what our platform can see. The questions we can answer about human immune biology across hundreds of donors, across perturbation conditions, and across disease contexts are bounded by how well our measurements capture what matters and exclude what doesn't. At population scale, getting this right is both high-leverage and difficult: systematic biases that would be invisible in a single study compound across hundreds of donors and propagate into every downstream model and decision.
We are looking for a scientist whose primary orientation is the integrity of biological measurement. Someone who thinks about measurement as a system with failure modes, not as a set of protocols to execute. You will design and qualify the immunological assays that determine what our platform can see. The questions we can answer about human immune biology - across hundreds of donors, across perturbation conditions, across disease contexts - are bounded by how well our measurements capture what matters and exclude what doesn't. You will work at the interface of bench measurement and computational analysis, ensuring that our analytical systems are not only rigorous but designed to ask the right questions of the biology.
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Parallel Bio is an equal opportunity employer committed to fostering an inclusive and respectful workplace. We encourage applications from individuals of all backgrounds, regardless of age, gender, ethnicity, religion, disability, or sexual orientation. Compensation Range: $155K - $170K