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Top Series A companies in Boston

Companies that have closed a Series A - product-market fit confirmed and scaling. Filtered to companies headquartered in Boston.

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Built from a search like: “Top Series A companies in Boston”

Ranked by current headcount across Series A companies headquartered in Boston. Refreshed daily.

  1. 1
    Temu· Boston, Massachusetts, United States
    • Series A
    • 7.4k employees
    • Founded 2022
  2. 2
    University of Massachusetts· Boston, Massachusetts, United States
    • Series A
    • 3.5k employees
    • Founded 2020
  3. 3
    Mentor Collective· New Boston, Massachusetts, United States
    • Series A
    • 531 employees
    • Founded 2015
  4. 4
    Continuum· Boston, Massachusetts, United States
    • Series A
    • 530 employees
    • Founded 1983
  5. 5
    Ataccama· Boston, Massachusetts, United States
    • Series A
    • 466 employees
    • Founded 2007
Reveal 199 more·100 free credits, no card

Find engineers at Series A companies in Boston

Series A companies in Boston are some of the fastest-moving employers in the market. The list above ranks the largest Series A-stage companies headquartered in Boston by current headcount, drawn from public LinkedIn and Crunchbase records. With 204 matching companies in our index, the density of senior engineers, designers, and founders is unusually high.

At Series A, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the Bostontalent 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 A companies in Boston” or “senior engineers at Series A companies in Boston hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Series A companies headquartered in Boston 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: Sun, 21 Jun 2026 09:36:55 GMT

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