Refolk
BlogSign in

Series A Cybersecurity companies in New York

Companies defending or attacking software, networks, and cloud infrastructure. Filtered to Series A-stage companies headquartered in New York.

Built from a search like: “Top Series A Cybersecurity companies in New York”

Ranked by current headcount across Series A Cybersecurity companies in New York. Refreshed daily.

  1. 1
    TypingDNA· Brooklyn, New York, United States
    • Series A
    • 150 employees
    • Founded 2016
  2. 2
    Seal Security· New York, New York, United States
    • Series A
    • 114 employees
    • Founded 2022
  3. 3
    LayerX Security· New York, New York, United States
    • Series A
    • 101 employees
    • Founded 2021
  4. 4
    Nagomi Security· New York, New York, United States
    • Series A
    • 75 employees
    • Founded 2023
  5. 5
    Strike· New York, New York, United States
    • Series A
    • 74 employees
    • Founded 2021
  6. 6
    Clover Security· New York, New York, United States
    • Series A
    • 68 employees
    • Founded 2023
  7. 7
    Valence Security· New York, New York, United States
    • Series A
    • 59 employees
    • Founded 2021
  8. 8
    Miggo Security· New York, New York, United States
    • Series A
    • 53 employees
    • Founded 2023
  9. 9
    Echo· New York, New York, United States
    • Series A
    • 53 employees
    • Founded 2025
  10. 10
    Clutch Security· New York, New York, United States
    • Series A
    • 50 employees
    • Founded 2023
  11. 11
    Jericho Security· New York, New York, United States
    • Series A
    • 48 employees
    • Founded 2018
  12. 12
    Prompt Security· New York, New York, United States
    • Series A
    • 48 employees
    • Founded 2023
  13. 13
    Gambit Security· New York, New York, United States
    • Series A
    • 48 employees
    • Founded 2024
  14. 14
    Astelia· New York, New York, United States
    • Series A
    • 44 employees
    • Founded 2024
  15. 15
    imper.ai· New York, New York, United States
    • Series A
    • 40 employees
    • Founded 2024
  16. 16
    Lema AI· New York, New York, United States
    • Series A
    • 38 employees
    • Founded 2023
  17. 17
    Laminar (acquired by Rubrik)· New York, New York, United States
    • Series A
    • 33 employees
    • Founded 2020
  18. 18
    NopSec· New York, New York, United States
    • Series A
    • 33 employees
    • Founded 2013
  19. 19
    Tracebit· New York, New York, United States
    • Series A
    • 33 employees
    • Founded 2023
  20. 20
    Reclaim Security· New York, New York, United States
    • Series A
    • 27 employees
    • Founded 2024
  21. 21
    Gem Security (acquired by Wiz)· New York, New York, United States
    • Series A
    • 26 employees
    • Founded 2022
  22. 22
    Orchestra Group· New York, New York, United States
    • Series A
    • 22 employees
    • Founded 2018
  23. 23
    Artemis Security· New York, New York, United States
    • Series A
    • 15 employees
    • Founded 2025
  24. 24
    Cyrisma· Rochester, New York, United States
    • Series A
    • 14 employees
    • Founded 2018
  25. 25
    Kusari· New York City Metropolitan Area
    • Series A
    • 13 employees
    • Founded 2022

Find engineers at Series A Cybersecurity companies in New York

Searching for “engineers at top Series A Cybersecurity companies in New York” surfaces this slice of the market. The list above ranks Cybersecurity companies headquartered in New York whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 30 matching companies in our index, this is a tight read on where the Cybersecurity talent in New York is heating up.

Three filters at once narrows the field hard. The companies that survive all three — Series A, Cybersecurity, in New York — are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Cybersecurity’s next operators and angel investors.

Refolk converts this list into a live search. Ask for “senior engineers at Series A Cybersecurity companies in New York hiring” or “founders of Series A Cybersecurity companies in New York who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.

How this list is built

Refolk pulled Cybersecurity companies headquartered in New York whose latest disclosed funding round is Series A from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 07:58:51 GMT

Need an even more specific search?

Refolk runs natural-language searches across LinkedIn, GitHub, and the open web. Try one of these:

Related lists

See all company lists.

Slice this list a different way