# Parallel Biosystems

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/parallel-biosystems

- Industry: Biotechnology
- Headquarters: Cambridge, US
- Website: www.parallel.bio
- Total disclosed funding: $25M
- Latest round: Series A (Jun 12, 2025)
- Investors on record: 9

## About

Based in Massachusetts, US, and founded in 2021 by its CEO Robert M. DiFazio, and CSO Juliana L. Hilliard, Parallel Biosystems, Inc. operates as a biotech company that develops replicates of the human immune system in a dish for drug discovery and development. In June 2025, Parallel Biosystems, Inc. raised USD 21 million in series A funding led by new investor AIX Ventures, with participation from another new investor Amplo. Returning investors Metaplanet Holdings, Susa Ventures, Atypical Ventures, Undeterred Capital and individual investors also participated in the round. Parallel Biosystems, Inc. develops a platform that combines human immune organoids with artificial intelligence and robotics to analyze the hundreds of cells and thousands of molecules that comprise the immune system and generate unprecedented insights into human health and disease. The immune organoid, which is a mini human lymph node, each organoid is about the size of a pencil eraser and has all the same molecules, cells, and structures found in human lymph nodes. The company plans to use the series A funding to support the further development of its AI and automation capabilities, expand its team of scientists and engineers, and sign new pharmaceutical partnerships.

## Funding rounds

- Series A, Jun 12, 2025, $21M — Susa Ventures, Amplo, Atypical Ventures, AIX Ventures, Metaplanet Holdings, Undeterred Capital
- Seed, Dec 20, 2022, $4.3M — Y Combinator, Breakout Ventures, Refactor Capital

## Investors

- Y Combinator (https://capitalatlas.ai/funds/y-combinator) — Seed
- Breakout Ventures (https://capitalatlas.ai/funds/breakout-ventures) — Seed
- Refactor Capital (https://capitalatlas.ai/funds/refactor-capital) — Seed
- Susa Ventures (https://capitalatlas.ai/funds/susa-ventures) — Series A
- Amplo (https://capitalatlas.ai/funds/amplo) — Series A
- Atypical Ventures (https://capitalatlas.ai/funds/atypical-ventures) — Series A
- AIX Ventures (https://capitalatlas.ai/funds/aix-ventures) — Series A
- Metaplanet Holdings (https://capitalatlas.ai/funds/metaplanet-holdings) — Series A
- Undeterred Capital (https://capitalatlas.ai/funds/undeterred-capital) — Series A