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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 monthly.

  1. 1
    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
  2. 2
    Javara· Winston-Salem, North Carolina, United States

    A top U.S. site network, Javara partners with healthcare organizations and specialty practices to deliver clinical trials at the point of care. Javara’s model makes research achievable and scalable for any health system while driving faster enrollment, stronger retention, and richer data across the research lifecycle for sponsors and CROs. Learn more at javararesearch.com.

    • Series C
    • 199 employees
    • Founded 2018
  3. 3
    DP Technology· Xinchengzi, Beijing, China

    DP Technology is a pioneer and practitioner of the "AI for Science" research paradigm. This approach leverages AI to learn and apply science principles and knowledge, helping to solve critical challenges in scientific research and industrial R&D.DP's commitment to interdisciplinary research has led to the creation of the DP "Particle Universe", an array of pre-trained large science models designed to bridge foundational research with practical industrial applications. DP's software suite includes the Bohrium® Scientific Research Space, Hermite® Computational Drug Design Platform, RiDYMO® Dynamics Platform, and Piloteye® Battery Design Automation Platform. Together, these platforms form a robust foundation for industrial innovation and an open ecosystem for AI in science, fostering advancements in key areas such as drug discovery, energy, material science, and information technology. Email: info@dp.tech

    • Series C
    • 107 employees
    • Founded 2018
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  5. 4
    Unlearn.AI· San Francisco, California, United States

    Unlearn exists to transform clinical development by making every trial smarter.

    • Series C
    • 74 employees
    • Founded 2017
  6. 5
    Fullpower-AI· Santa Cruz, California, United States

    Our mission is to make advanced AI biosensing universally accessible, empowering better sleep, Remote Patient Monitoring (RPM), and healthspan through real-time, science-validated intelligence.

    • Series C
    • 64 employees
    • Founded 2005

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 29 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.

Refolk converts this list into a search. Ask for Series C AI founders hiring senior engineers” or “design leads at Series C AI companies” and Refolk returns a fresh ranked shortlist with the sources behind each match.

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 monthly.

Last refreshed: Tue, 15 Sep 2026 10:13:57 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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