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Top Series D companies in San Francisco

Late-stage venture: Series D companies often eyeing IPO or large strategic exits. Filtered to companies headquartered in San Francisco.

Built from a search like: “Top Series D companies in San Francisco”

Ranked by current headcount across Series D companies headquartered in San Francisco. Refreshed daily.

  1. 1
    Postman· San Francisco, California, United States
    • Series D
    • 3.4k employees
    • Founded 2014
  2. 2
    Instawork· San Francisco, California, United States
    • Series D
    • 2.3k employees
    • Founded 2016
  3. 3
    Zeta· San Francisco, California, United States
    • Series D
    • 2.2k employees
    • Founded 2015
  4. 4
    Homebase· San Francisco, California, United States
    • Series D
    • 1.8k employees
    • Founded 2014
  5. 5
    Vanta· San Francisco, California, United States
    • Series D
    • 1.7k employees
    • Founded 2018
  6. 6
    Sigma· San Francisco, California, United States
    • Series D
    • 1.4k employees
    • Founded 2014
  7. 7
    Fitbit (now part of Google)· San Francisco, California, United States
    • Series D
    • 1.2k employees
    • Founded 2007
  8. 8
    Zip· San Francisco, California, United States
    • Series D
    • 1.2k employees
    • Founded 2020
  9. 9
    Cisco ThousandEyes· San Francisco, California, United States
    • Series D
    • 997 employees
    • Founded 2010
  10. 10
    Tubi· San Francisco, California, United States
    • Series D
    • 915 employees
    • Founded 2014
  11. 11
    Modern Health· San Francisco, California, United States
    • Series D
    • 900 employees
    • Founded 2017
  12. 12
    MaintainX· San Francisco, California, United States
    • Series D
    • 838 employees
    • Founded 2018
  13. 13
    Niantic, Inc.· San Francisco, California, United States
    • Series D
    • 692 employees
    • Founded 2011
  14. 14
    Transcarent· San Francisco, California, United States
    • Series D
    • 671 employees
    • Founded 2020
  15. 15
    Tally· San Francisco, California, United States
    • Series D
    • 668 employees
    • Founded 2015
  16. 16
    Persona· San Francisco, California, United States
    • Series D
    • 666 employees
    • Founded 2018
  17. 17
    CleverTap· San Francisco, California, United States
    • Series D
    • 665 employees
    • Founded 2013
  18. 18
    Mode· San Francisco, California, United States
    • Series D
    • 664 employees
    • Founded 2013
  19. 19
    Newfront· San Francisco, California, United States
    • Series D
    • 649 employees
    • Founded 2017
  20. 20
    Qualia· San Francisco, California, United States
    • Series D
    • 603 employees
    • Founded 2015
  21. 21
    Oyster®· San Francisco, California, United States
    • Series D
    • 590 employees
    • Founded 2020
  22. 22
    Monte Carlo· San Francisco, California, United States
    • Series D
    • 574 employees
    • Founded 2019
  23. 23
    FLYR· San Francisco, California, United States
    • Series D
    • 564 employees
    • Founded 2013
  24. 24
    Medallion· San Francisco, California, United States
    • Series D
    • 536 employees
    • Founded 2020
  25. 25
    Front· San Francisco, California, United States
    • Series D
    • 531 employees
    • Founded 2013

Find engineers at Series D companies in San Francisco

Series D companies in San Francisco are some of the fastest-moving employers in the market. The list above ranks the largest Series D-stage companies headquartered in San Francisco by current headcount, drawn from public LinkedIn and Crunchbase records. With 103 matching companies in our index, the density of senior engineers, designers, and founders is unusually high.

At Series D, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the San Franciscotalent market is heating up — and for which engineers and founders are about to become tomorrow’s operators.

Refolk converts this list into a live search. Ask for “founders of Series D companies in San Francisco” or “senior engineers at Series D companies in San Francisco hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Series D companies headquartered in San Francisco 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 08:50:04 GMT

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