Investor Lists

AI investors based in Boston

Updated 7 November 2026

Firms with an address in Boston that we have watched back an AI company in the last two years.

See all 70 →The top 25
70investors on the list+1 this week
634cheques in 12 months+0% against the market
$19Mmedian round they joined+138% against the market median
89%wrote a cheque in 12 months
60%have led a round

The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (24)

  1. 1MassChallengeDeploying nowAccelerator · United States984$1.8Mmedian roundSept 2026last seen
  2. 2Battery VenturesDeploying nowVC firm · United States658$32Mmedian roundNov 2026last seen
  3. 3Polaris PartnersDeploying nowVC firm · United States490$36Mmedian roundOct 2026last seen
  4. 4RA Capital ManagementDeploying nowPrivate equity · United States395$93Mmedian roundNov 2026last seen
  5. 5Summit PartnersDeploying nowPrivate equity · United States356$81Mmedian roundOct 2026last seen
  6. 6Wellington ManagementDeploying nowVC firm · United States297$130Mmedian roundOct 2026last seen
  7. 7Globespan Capital PartnersquietVC firm · United States156$43Mmedian roundJul 2025last seen
  8. 8406 VenturesDeploying nowVC firm · United States136$15Mmedian roundOct 2026last seen
  9. 9Flare CapitalDeploying nowVC firm · United States93$12Mmedian roundOct 2026last seen
  10. 10HarbourVest PartnersDeploying nowFund of funds · United States93$54Mmedian roundJun 2026last seen
  11. 11MassMutual VenturesDeploying nowVC firm · United States84$14Mmedian roundOct 2026last seen
  12. 12Pillar VCDeploying nowVC firm · United States83$8.2Mmedian roundSept 2026last seen
  13. 13Castle Island VenturesDeploying nowVC firm · United States78$7Mmedian roundOct 2026last seen
  14. 14The E14 FundDeploying nowVC firm · United States72$8Mmedian roundOct 2026last seen
  15. 15One Way VenturesDeploying nowVC firm · United States71$8Mmedian roundNov 2026last seen
  16. 16PSGDeploying nowVC firm · United States68$50Mmedian roundAug 2026last seen
  17. 17Underscore VCDeploying nowVC firm · United States65$7Mmedian roundSept 2026last seen
  18. 18HubSpot VenturesDeploying nowCorporate VC · United States64$25Mmedian roundNov 2026last seen
  19. 19Four Cities CapitalDeploying nowVC firm · United States62$5.3Mmedian roundOct 2026last seen
  20. 20Advent InternationalDeploying nowPrivate equity · United States59$740Mmedian roundOct 2026last seen
  21. 21Bain CapitalDeploying nowPrivate equity · United States58$50Mmedian roundAug 2026last seen
  22. 22Spectrum EquityDeploying nowPrivate equity · United States55$62Mmedian roundSept 2026last seen
  23. 23ElephantDeploying nowVC firm · United States54$16Mmedian roundJul 2026last seen
  24. 24Optum VenturesDeploying nowVC firm · United States53$25Mmedian roundOct 2026last seen
  25. 25Glasswing VenturesDeploying nowVC firm · United States50$5.2Mmedian roundOct 2026last seen
45 more on this list

All 70 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

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Quick answers about AI investors based in Boston

Who are the most active AI investors based in Boston?

By cheques observed, the most active are MassChallenge, Battery Ventures, Polaris Partners, RA Capital Management and Summit Partners.

How many AI investors based in Boston are there?

70 are on record. 89% made an investment in the last 12 months and 60% have led a round.

Which stages do AI investors based in Boston back?

Of the rounds with a named stage in the last 12 months, mostly Series A (22%) and Seed (19%).

How big are the rounds AI investors based in Boston join?

The typical (median) round among the leading investors here is $25M.

Which sectors do AI investors based in Boston back most?

In the last 12 months, mostly AI, Biotech and Healthcare.

Which AI investors based in Boston lead the most rounds?

Battery Ventures (29 led), RA Capital Management (15 led) and Wellington Management (15 led).

What have AI investors based in Boston invested in recently?

Recent rounds include Alethio Therapeutics (Series A, Nov 2026, with RA Capital Management), Shackleton AI (Seed, Nov 2026, with Battery Ventures) and Lazarus AI (Nov 2026, with One Way Ventures).

How is this list of AI investors based in Boston ranked?

By cheques observed, from the rounds and filings we watched, and never by anything anyone paid for. It is rebuilt every night.

Built from the rounds we watched, refreshed every night. How we count · Report a correction