Investor Lists

Seed open Source investors

Updated 7 November 2026

Firms we have watched take part in a seed round raised by an open Source company in the last two years. Both the stage and the sector are what they did, not what their website says.

See all 45 →The top 25
45investors on the listNo change this week
1,822cheques in 12 months-10% against the market
$8Mmedian round they joined+0% against the market median
76%wrote a cheque in 12 months
44%have led a round

The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (24)

  1. 1Y CombinatorDeploying nowAccelerator · United States6,412$3Mmedian roundOct 2026last seen
  2. 2General CatalystDeploying nowVC firm · United States1,387$27Mmedian roundNov 2026last seen
  3. 3Bessemer Venture PartnersDeploying nowVC firm · United States1,038$30Mmedian roundNov 2026last seen
  4. 4Pioneer FundDeploying nowPrivate equity · United States551$2.9Mmedian roundNov 2026last seen
  5. 5Goodwater CapitalDeploying nowVC firm · United States526$4.1Mmedian roundSept 2026last seen
  6. 6SeedcampDeploying nowVC firm · United Kingdom519$5Mmedian roundNov 2026last seen
  7. 7Slow VenturesDeploying nowVC firm · United States438$10Mmedian roundOct 2026last seen
  8. 8FirstMarkDeploying nowVC firm · United States319$20Mmedian roundOct 2026last seen
  9. 9Quiet CapitalDeploying nowVC firm · United States283$17Mmedian roundOct 2026last seen
  10. 10Cota CapitalDeploying nowVC firm · United States200$15Mmedian roundJul 2026last seen
  11. 11Point Nine CapitalDeploying nowVC firm · Germany184$8.6Mmedian roundNov 2026last seen
  12. 12Streamlined VenturesDeploying nowVC firm · United States164$7.5Mmedian roundAug 2026last seen
  13. 13Costanoa VenturesDeploying nowVC firm · United States154$12Mmedian roundSept 2026last seen
  14. 14Blockchain CapitalDeploying nowVC firm · United States130$15Mmedian roundNov 2026last seen
  15. 15Guillermo RauchDeploying nowVC firm76$10Mmedian roundNov 2026last seen
  16. 16Chapter One VenturesDeploying nowVC firm · United States48$6.7Mmedian roundJun 2026last seen
  17. 17Colorado Office of Economic Development and International TradeDeploying nowGovernment · United States47$250Kmedian roundMay 2026last seen
  18. 18BedrockDeploying nowVC firm · United States9$100Mmedian roundSept 2026last seen
  19. 19DRWDeploying nowVC firm · United States9$22Mmedian roundOct 2026last seen
  20. 20P1 VenturesquietPrivate equity · United States7$8Mmedian roundOct 2025last seen
  21. 21Valley Capital PartnersDeploying nowVC firm · United States7$12Mmedian roundNov 2026last seen
  22. 22Sunflower CapitalDeploying nowVC firm · United States6$19Mmedian roundJul 2026last seen
  23. 23CoalitionDeploying nowVC firm · United States5$14Mmedian roundAug 2026last seen
  24. 24Clem DelangueDeploying nowVC firm4$12Mmedian roundMay 2026last seen
  25. 25Microsoft's M12Deploying nowGrowth equity4$54Mmedian roundMay 2026last seen
20 more on this list

All 45 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 →

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Quick answers about seed open Source investors

Who are the most active seed open Source investors?

By cheques observed, the most active are Y Combinator, General Catalyst, Bessemer Venture Partners, Pioneer Fund and Goodwater Capital.

How many seed open Source investors are there?

45 are on record. 76% made an investment in the last 12 months and 44% have led a round.

Which stages do seed open Source investors back?

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

How big are the rounds seed open Source investors join?

The typical (median) round among the leading investors here is $12M.

Which sectors do seed open Source investors back most?

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

Which seed open Source investors lead the most rounds?

General Catalyst (97 led), Bessemer Venture Partners (51 led) and FirstMark (18 led).

Where are seed open Source investors based?

Most of the leading investors here are based in the United States (20 of the top 25); the rest in the United Kingdom and Germany.

What have seed open Source investors invested in recently?

Recent rounds include Nyquis (Seed, Nov 2026, with Pioneer Fund), Uranium Digital (Series A, Nov 2026, with Blockchain Capital) and Granit (Seed, Nov 2026, with Seedcamp).

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