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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.

Built from a search like: “Top Series C AI companies”

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

  1. 1
    ConcertAI· Cambridge, Massachusetts, United States
    • Series C
    • 818 employees
    • Founded 2018
  2. 2
    BioTelemetry, Inc.· Malvern, Pennsylvania, United States
    • Series C
    • 591 employees
    • Founded 2008
  3. 3
    Forge Biologics· Columbus, Ohio, United States
    • Series C
    • 426 employees
    • Founded 2020
  4. 4
    BioTissue· Miami, Florida, United States
    • Series C
    • 368 employees
    • Founded 2001
  5. 5
    Generate:Biomedicines· Somerville, Massachusetts, United States
    • Series C
    • 328 employees
    • Founded 2018
  6. 6
    Vividion Therapeutics, Inc.· San Diego, California, United States
    • Series C
    • 264 employees
    • Founded 2017
  7. 7
    insitro· South San Francisco, California, United States
    • Series C
    • 247 employees
    • Founded 2018
  8. 8
    Colossal Biosciences· Dallas, Texas, United States
    • Series C
    • 246 employees
    • Founded 2021
  9. 9
    Clinipace· Morrisville, North Carolina, United States
    • Series C
    • 242 employees
    • Founded 2003
  10. 10
    ProBio· Piscataway, New Jersey, United States
    • Series C
    • 228 employees
    • Founded 2020
  11. 11
    Umoja Biopharma· Seattle, Washington, United States
    • Series C
    • 223 employees
    • Founded 2019
  12. 12
    Vazyme· Nanjing, Jiangsu, China
    • Series C
    • 212 employees
    • Founded 2012
  13. 13
    Loyal· Dallas, Texas, United States
    • Series C
    • 205 employees
    • Founded 2020
  14. 14
    Valo Health· Lexington, Massachusetts, United States
    • Series C
    • 204 employees
    • Founded 2019
  15. 15
    Arsenal Biosciences, Inc.· South San Francisco, California, United States
    • Series C
    • 203 employees
    • Founded 2019
  16. 16
    Karius· Redwood City, California, United States
    • Series C
    • 201 employees
    • Founded 2014
  17. 17
    Javara· Winston-Salem, North Carolina, United States
    • Series C
    • 192 employees
    • Founded 2018
  18. 18
    Nusano· West Valley City, Utah, United States
    • Series C
    • 176 employees
    • Founded 2013
  19. 19
    bit.bio· Sawston, England, United Kingdom
    • Series C
    • 159 employees
    • Founded 2016
  20. 20
    Tropic· Colney, England, United Kingdom
    • Series C
    • 152 employees
    • Founded 2016
  21. 21
    Seven Bridges· Boston, Massachusetts, United States
    • Series C
    • 150 employees
    • Founded 2009
  22. 22
    Advanced Cell Diagnostics (ACD)· Newark, California, United States
    • Series C
    • 137 employees
    • Founded 2006
  23. 23
    Visterra Inc.· Waltham, Massachusetts, United States
    • Series C
    • 136 employees
    • Founded 2008
  24. 24
    Nuclera· Histon, England, United Kingdom
    • Series C
    • 135 employees
    • Founded 2013
  25. 25
    Parse Biosciences· Seattle, Washington, United States
    • Series C
    • 128 employees
    • Founded 2018

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 256matching 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 once a day.

Last refreshed: Thu, 07 May 2026 06:35:16 GMT

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