Investor Lists

Open Source investors

Updated 7 November 2026

Firms observed backing an open Source company in the last two years, taken from what they funded rather than from what their website says they like.

See all 180 →The top 25
180investors on the listNo change this week
6,612cheques in 12 months-2% against the market
$20Mmedian round they joined+150% against the market median
88%wrote a cheque in 12 months
66%have led a round

The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (25)

  1. 1Y CombinatorDeploying nowAccelerator · United States6,412$3Mmedian roundOct 2026last seen
  2. 2500 GlobalDeploying nowAngel · United States2,140$3.6Mmedian roundOct 2026last seen
  3. 3Sequoia CapitalDeploying nowVC firm · United States2,099$35Mmedian roundNov 2026last seen
  4. 4Andreessen HorowitzDeploying nowVC firm · United States1,661$27Mmedian roundNov 2026last seen
  5. 5New Enterprise AssociatesDeploying nowVC firm · United States1,610$34Mmedian roundOct 2026last seen
  6. 6Alumni VenturesDeploying nowVC firm · United States1,598$12Mmedian roundNov 2026last seen
  7. 7General CatalystDeploying nowVC firm · United States1,387$27Mmedian roundNov 2026last seen
  8. 8SV AngelDeploying nowVC firm · United States1,349$18Mmedian roundOct 2026last seen
  9. 9AccelDeploying nowVC firm · United States1,341$32Mmedian roundNov 2026last seen
  10. 10Lightspeed Venture PartnersDeploying nowVC firm · United States1,341$35Mmedian roundNov 2026last seen
  11. 11BpifranceDeploying nowGovernment · France1,151$4.5Mmedian roundOct 2026last seen
  12. 12Khosla VenturesDeploying nowVC firm · United States1,128$26Mmedian roundNov 2026last seen
  13. 13Intel CapitalDeploying nowCorporate VC · United States1,123$22Mmedian roundOct 2026last seen
  14. 14Bessemer Venture PartnersDeploying nowVC firm · United States1,038$30Mmedian roundNov 2026last seen
  15. 15Index VenturesDeploying nowVC firm · United Kingdom1,027$31Mmedian roundNov 2026last seen
  16. 16GaingelsDeploying nowPrivate equity · United States1,010$8Mmedian roundOct 2026last seen
  17. 17Google VenturesDeploying nowCorporate VC · United States884$38Mmedian roundOct 2026last seen
  18. 18Tiger Global ManagementDeploying nowVC firm · United States773$47Mmedian roundNov 2026last seen
  19. 19Insight PartnersDeploying nowVC firm · United States765$40Mmedian roundOct 2026last seen
  20. 20Menlo VenturesDeploying nowVC firm · United States740$37Mmedian roundOct 2026last seen
  21. 21Salesforce VenturesDeploying nowCorporate VC · United States649$26Mmedian roundNov 2026last seen
  22. 22FelicisDeploying nowVC firm · United States640$20Mmedian roundNov 2026last seen
  23. 23CRVDeploying nowVC firm · United States588$20Mmedian roundOct 2026last seen
  24. 24BenchmarkDeploying nowVC firm · United States587$30Mmedian roundOct 2026last seen
  25. 25CitibankDeploying nowGrowth equity · United States566$20Mmedian roundOct 2026last seen
155 more on this list

All 180 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

See the whole list →

Quick answers about open Source investors

Who are the most active open Source investors?

By cheques observed, the most active are Y Combinator, 500 Global, Sequoia Capital, Andreessen Horowitz and New Enterprise Associates.

How many open Source investors are there?

180 are on record. 88% made an investment in the last 12 months and 66% have led a round.

Which stages do open Source investors back?

Of the rounds with a named stage in the last 12 months, mostly Seed (25%) and Series A (24%).

How big are the rounds open Source investors join?

The typical (median) round among the leading investors here is $27M.

Which sectors do open Source investors back most?

In the last 12 months, mostly AI, Fintech and Big Data & Analytics.

Which open Source investors lead the most rounds?

Andreessen Horowitz (114 led), Accel (103 led) and General Catalyst (97 led).

Where are open Source investors based?

Most of the leading investors here are based in the United States (23 of the top 25); the rest in France and the United Kingdom.

What have open Source investors invested in recently?

Recent rounds include LionBio Therapeutics (Pre-seed, Nov 2026, with South Park Commons), Shield AI (Nov 2026, with Disruptive) and Thinking Machines Lab (Other, Nov 2026, with Accel).

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