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Top Fintech companies in Boston

Companies modernising banking, payments, lending, and financial infrastructure. Filtered to companies headquartered in Boston.

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

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

  1. 1
    Fidelity Investments· Boston, Massachusetts, United States
    • Secondary
    • 85.1k employees
    • Founded 1946
  2. 2
    State Street· Boston, Massachusetts, United States
    • Post-IPO debt
    • 46.2k employees
  3. 3
    Liberty Mutual Insurance· Boston, Massachusetts, United States
    • Debt
    • 38k employees
    • Founded 1912
  4. 4
    Santander Bank, N.A.· Boston, Massachusetts, United States
    • Debt
    • 9.8k employees
    • Founded 2013
  5. 5
    John Hancock· Boston, Massachusetts, United States
    • 5k employees
  6. 6
    Xceedance· Boston, Massachusetts, United States
    • Private equity
    • 4.7k employees
    • Founded 2013
  7. 7
    Wellington Management· Boston, Massachusetts, United States
    • 3.6k employees
    • Founded 1933
  8. 8
    MFS Investment Management· Boston, Massachusetts, United States
    • 2.9k employees
    • Founded 1924
  9. 9
    Beacon Bank· Boston, Massachusetts, United States
    • 2.7k employees
  10. 10
    Columbia Threadneedle Investments· Boston, Massachusetts, United States
    • 2.4k employees
    • Founded 1985
  11. 11
    Eastern Bank· Boston, Massachusetts, United States
    • Debt
    • 2.4k employees
  12. 12
    State Street Investment Management· Boston, Massachusetts, United States
    • 2.4k employees
    • Founded 1978
  13. 13
    Risk Strategies Company· Boston, Massachusetts, United States
    • 2.4k employees
    • Founded 1997
  14. 14
    Bain Capital· Boston, Massachusetts, United States
    • Debt
    • 2.2k employees
    • Founded 1984
  15. 15
    Plymouth Rock Assurance· Boston, Massachusetts, United States
    • 2.2k employees
    • Founded 2001
  16. 16
    Natixis Investment Managers· Boston, Massachusetts, United States
    • 2k employees
    • Founded 2007
  17. 17
    Berkshire Hathaway Specialty Insurance· Boston, Massachusetts, United States
    • 1.9k employees
    • Founded 2013
  18. 18
    Cambridge Associates· Boston, Massachusetts, United States
    • Private equity
    • 1.9k employees
    • Founded 1973
  19. 19
    Comparion Insurance Agency· Boston, Massachusetts, United States
    • 1.8k employees
    • Founded 2022
  20. 20
    PSG· Boston, Massachusetts, United States
    • 1.5k employees
    • Founded 2014
  21. 21
    HarbourVest Partners· Boston, Massachusetts, United States
    • 1.4k employees
    • Founded 1982
  22. 22
    Advent· Boston, Massachusetts, United States
    • 1.3k employees
    • Founded 1984
  23. 23
    Federal Reserve Bank of Boston· Boston, Massachusetts, United States
    • 1.3k employees
    • Founded 1914
  24. 24
    Homesite Insurance· Boston, Massachusetts, United States
    • 1.3k employees
    • Founded 1997
  25. 25
    K3 Advisory Group· Bolton, England, United Kingdom
    • Post-IPO equity
    • 1.1k employees
    • Founded 2007

Find engineers at Fintech companies in Boston

Boston has long been a hub for Fintech, and the list above ranks the largest Fintech companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 824 matching companies in our index, this is a good map of where the Fintech talent in Bostonlives — useful whether you’re recruiting, partnering, or sizing a market.

The biggest Fintech companies in Boston tend to be the gravitational centres for specialised talent — senior engineers, ML researchers, applied scientists, designers — while the smaller ones compete on speed, equity, and proximity to founders.

Refolk converts this list into a live search. Ask for “Fintech engineers in Bostonhiring senior staff” or “founders of Fintech companies in Bostonwho left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.

How this list is built

Refolk pulled Fintech companies headquartered in Boston from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 10 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 06:55:08 GMT

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