Most Active SaaS Investors in Boston 2026

15 firms writing SaaS checks in Boston, led by York IE, Advanced Technology Ventures, Black Coral Capital — ranked by verified deal count with the companies.

SaaS in Boston accounts for 8 tracked companies with verified cap-table data, 8 of which disclose round sizes totalling $2.7B. The median disclosed raise is $97M, and the largest is Klaviyo at $1.5B, ahead of Toast ($515M) and Starburst ($400M).

The names that recur most often on these saas cap tables are Bessemer Venture Partners (2 companies), Accel (1 company), Summit Partners (1 company), Sands Capital (1 company), Shopify (1 company), TPG (1 company). By latest disclosed round, the market skews Series B (3), IPO (2), Series D (1), Series C (1).

Best funded SaaS in Boston companies

  1. Klaviyo — $1.5B (latest: IPO)
  2. Toast — $515M (latest: IPO)
  3. Starburst — $400M (latest: Series D)
  4. CloudZero — $97M (latest: Series C)
  5. Maven AGI — $78M (latest: Series B)
  6. Catalog — $60M (latest: Series B)
  7. Ovation — $34M (latest: Series B)
  8. BusRight — $30M (latest: Series A)

Sector × city funding reports (20)

All research · Investor directory · Company funding database · Fundraising library