Top Series C AI companies

Companies building AI products, foundation models, and applied ML platforms. Filtered to companies whose latest disclosed round is Series C.

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Ranked by current headcount across Series C AI companies. Refreshed daily.

1
ConcertAI· Cambridge, Massachusetts, United States
ConcertAI orchestrates clinical expertise, real-world data and applied AI to deliver practical intelligence for the demands of treating oncology and other complex diseases.
- Series C
- 860 employees
- Founded 2018
2
Forge Biologics· Columbus, Ohio, United States
Forge, a member of Ajinomoto Bio-Pharma Services, is a gene therapy development engine, focused on enabling access to life changing gene therapies and helping bring them from idea into reality. We partner with innovators in the gene therapy community: scientists, physicians, biotech/pharma companies, and patient groups. We bring expertise in gene therapy manufacturing and therapeutics development to the table, helping champion teams that are navigating the long road from the lab bench to the bedside. With a patients-first approach, we are forging new models for working together to better accelerate these transformative medicines to reach those who need them most.
- Series C
- 440 employees
- Founded 2020
3
BioTissue· Miami, Florida, United States
BioTissue is the leader in innovative technologies using products derived from human amniotic and umbilical cord tissues. Since its inception in 1997, the Company has pioneered the clinical application of human placental tissues – more than 680,000 patients have been treated with BioTissue products and the Company’s groundbreaking scientific and clinical achievements have been documented in more than 380 peer-reviewed publications.
- Series C
- 368 employees
- Founded 2001
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4
Generate:Biomedicines· Somerville, Massachusetts, United States
Pioneering generative biology to create breakthrough therapeutics.
- Series C
- 335 employees
- Founded 2018
5
Vividion Therapeutics, Inc.· San Diego, California, United States
Vividion Therapeutics, Inc. is a biotechnology company focused on transforming the future of human health through the creation of highly selective small molecule medicines that drug traditionally inaccessible targets. The company is advancing a broad, diversified pipeline of multiple, selective small molecule therapeutics for highly sought-after disease-causing target proteins in oncology and immunology. The company’s cutting-edge platform was spun out of the labs of Vividion’s scientific founders, a team of experts in chemical biology and synthetic chemistry from The Scripps Research Institute in La Jolla, CA.
- Series C
- 269 employees
- Founded 2017

6
Colossal Biosciences· Dallas, Texas, United States
Making extinction a thing of the past.Colossal is a breakthrough bioscience and genetic engineering company that builds radical new technologies to advance the field of genomics. Colossal creates disruptive technologies for extinct species restoration, critically endangered species protection and the repopulation of critical ecosystems that support the continuation of life on Earth. The company is the first to apply CRISPR technology for the purposes of species de-extinction. Colossal is accepting humanity’s duty to restore Earth to a healthier state, while also solving for the future economies and biological necessities of the human condition through cutting-edge science and technologies.
- Series C
- 263 employees
- Founded 2021
7
insitro· South San Francisco, California, United States
insitro is the physical AI company unlocking causal human biology, founded and led by AI pioneer Daphne Koller. By generating the world’s largest integrated multi-modal corpus of human and cellular data, we’ve built the Virtual HumanTM – a genetically anchored causal AI engine that reveals how disease begins, progresses, and can be resolved. Our platform enables us to precisely identify causal genetic drivers and deploy our TherMLTM AI platform to design optimal medicines, advancing a broad pipeline of therapeutics for neuroscience and metabolic diseases. This industrialized architecture creates a self-learning loop: with every biology we onboard, our predictive models grow smarter, accelerating discovery across scales of biology.Join us in transforming the future of medicine!
- Series C
- 256 employees
- Founded 2018
8
ProBio· Piscataway, New Jersey, United States
ProBio is a global contract development and manufacturing (CDMO) organization, which aims to accelerate the manufacturing of life-changing drugs, discover novel therapeutic targets, and develop innovative therapeutic approaches to manufacture best-in-class DNA, RNA, and protein-based therapeutics. As a global partner, ProBio brings together multi-disciplinary expertise to accelerate the manufacturing of advanced therapies, including biologics, protein and mRNA vaccines, viral vectors, antibody-drug conjugates and drug discovery services. We aid you in realizing the potential of your breakthrough discovery to treat diseases and improve lives. Let us accelerate your path to market with the greatest chance of success!
- Series C
- 246 employees
- Founded 2020
9
Umoja Biopharma· Seattle, Washington, United States
Umoja is developing a new approach to cancer therapy that retools a patient’s immune system in vivo, enhancing the body’s natural capacity to fight cancer. We envision a world where all patients have access to the most advanced immunotherapies and are free from the burdens of traditional cancer therapies.
- Series C
- 237 employees
- Founded 2019
10
Clinipace· Morrisville, North Carolina, United States
Caidya is a multi-therapeutic clinical research organization (CRO) serving innovators worldwide. Focused on delivery excellence and an elevated customer experience, Caidya offers a wide range of clinical services and vast therapeutic expertise, supporting its partners from pre-IND strategy, through clinical development to submission and post-marketing surveillance. Caidya leverages industry-leading and proprietary clinical technology to ensure trial transparency and data-driven decision-making. Formed in 2021 following the merger of leading CROs, dMed and Clinipace, Caidya has nearly 1,800 employees in 30+ countries throughout the world.
- Series C
- 235 employees
- Founded 2003

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Find engineers and founders at Series C AI companies

Series C AI companies are some of the most active hirers in the market. The list above ranks the largest AI companies whose latest disclosed round is Series C, by current headcount, drawn from public LinkedIn and Crunchbase records. Across 273 matching companies, you’ll find senior engineers, founding designers, and operators worth tracking.

Companies at this stage in AI share a profile: a working product, fresh capital, and a hiring plan that wants senior people yesterday. Looking at headcount, last round, and HQ side by side gives you a quick read on where AI talent is concentrating right now.

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How this list is built

Refolk pulled AI companies whose latest disclosed funding round is Series C from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 17:36:29 GMT

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