# Open Source investors in North America (2026 list) > 136 open Source investors in North America, 90% active in the last 12 months. Led by Y Combinator, 500 Global, Sequoia Capital. Ranked by what they funded. Source: https://millionrounds.com/lists/open-source-investors-in-north-america (Millionrounds; every figure on the page links to its filing or article) [Investor Lists](https://millionrounds.com/lists) # Open Source investors in North America Updated 7 November 2026 Firms observed backing an open Source company in North America in the last two years, wherever the firm is based. [See all 136 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fopen-source-investors-in-north-america)The top 25 **136** investors on the list No change this week **5,588** cheques in 12 months *-2%* against the market **$25M** median round they joined *+213%* against the market median **90%** wrote a cheque in 12 months **69%** have led a round ## The Top 25 Ordered by cheques observed, never by anything anyone paid for Deploying now (25) - 1 [Y Combinator](https://millionrounds.com/fund/y-combinator) *Deploying now* Accelerator · United States **6,412** **$3M** median round **Oct 2026** last seen - 2 [500 Global](https://millionrounds.com/fund/500-startups) *Deploying now* Angel · United States **2,140** **$3.6M** median round **Oct 2026** last seen - 3 [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) *Deploying now* VC firm · United States **2,099** **$35M** median round **Nov 2026** last seen - 4 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) *Deploying now* VC firm · United States **1,661** **$27M** median round **Nov 2026** last seen - 5 [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) *Deploying now* VC firm · United States **1,610** **$34M** median round **Oct 2026** last seen - 6 [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) *Deploying now* VC firm · United States **1,598** **$12M** median round **Nov 2026** last seen - 7 [General Catalyst](https://millionrounds.com/fund/general-catalyst) *Deploying now* VC firm · United States **1,387** **$27M** median round **Nov 2026** last seen - 8 [SV Angel](https://millionrounds.com/fund/sv-angel) *Deploying now* VC firm · United States **1,349** **$18M** median round **Oct 2026** last seen - 9 [Accel](https://millionrounds.com/fund/accel) *Deploying now* VC firm · United States **1,341** **$32M** median round **Nov 2026** last seen - 10 [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) *Deploying now* VC firm · United States **1,341** **$35M** median round **Nov 2026** last seen - 11 [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) *Deploying now* VC firm · United States **1,128** **$26M** median round **Nov 2026** last seen - 12 [Intel Capital](https://millionrounds.com/fund/intel-capital) *Deploying now* Corporate VC · United States **1,123** **$22M** median round **Oct 2026** last seen - 13 [Bessemer Venture Partners](https://millionrounds.com/fund/bessemer-venture-partners) *Deploying now* VC firm · United States **1,038** **$30M** median round **Nov 2026** last seen - 14 [Index Ventures](https://millionrounds.com/fund/index-ventures) *Deploying now* VC firm · United Kingdom **1,027** **$31M** median round **Nov 2026** last seen - 15 [Gaingels](https://millionrounds.com/fund/gaingels) *Deploying now* Private equity · United States **1,010** **$8M** median round **Oct 2026** last seen - 16 [Google Ventures](https://millionrounds.com/fund/gv) *Deploying now* Corporate VC · United States **884** **$38M** median round **Oct 2026** last seen - 17 [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) *Deploying now* VC firm · United States **773** **$47M** median round **Nov 2026** last seen - 18 [Insight Partners](https://millionrounds.com/fund/insight-venture-partners) *Deploying now* VC firm · United States **765** **$40M** median round **Oct 2026** last seen - 19 [Menlo Ventures](https://millionrounds.com/fund/menlo-ventures) *Deploying now* VC firm · United States **740** **$37M** median round **Oct 2026** last seen - 20 [Salesforce Ventures](https://millionrounds.com/fund/salesforce-ventures) *Deploying now* Corporate VC · United States **649** **$26M** median round **Nov 2026** last seen - 21 [CRV](https://millionrounds.com/fund/crv) *Deploying now* VC firm · United States **588** **$20M** median round **Oct 2026** last seen - 22 [Benchmark](https://millionrounds.com/fund/benchmark) *Deploying now* VC firm · United States **587** **$30M** median round **Oct 2026** last seen - 23 [Citibank](https://millionrounds.com/fund/citi) *Deploying now* Growth equity · United States **566** **$20M** median round **Oct 2026** last seen - 24 [Flybridge](https://millionrounds.com/fund/flybridge) *Deploying now* VC firm · United States **534** **$5M** median round **Sept 2026** last seen - 25 [Goodwater Capital](https://millionrounds.com/fund/goodwater-capital) *Deploying now* VC firm · United States **526** **$4.1M** median round **Sept 2026** last seen **111 more on this list** All 136 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 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fopen-source-investors-in-north-america) ## The Newest Cheques Rounds this list's investors joined most recently - **7** Nov **[LionBio Therapeutics](https://millionrounds.com/company/lionbio-therapeutics)** Pre-seed · $6M *With* [South Park Commons](https://millionrounds.com/fund/south-park-commons) - **6** Nov **[Shield AI](https://millionrounds.com/company/shield-ai)** $2B *Led by* [Disruptive](https://millionrounds.com/fund/disruptive) - **6** Nov **[Thinking Machines Lab](https://millionrounds.com/company/thinking-machines-lab)** Other · $5B *Led by* [Accel](https://millionrounds.com/fund/accel) - **6** Nov **[Harbinger](https://millionrounds.com/company/harbinger)** Series D+ · $240M *Led by* [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) - **5** Nov **[Siggy](https://millionrounds.com/company/siggy)** Pre-seed · $6M *Led by* [Village Global](https://millionrounds.com/fund/village-global-2) - **5** Nov **[firmly](https://millionrounds.com/company/firmly)** Series A · $15M *With* [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) ## Stages This Year 3,487 rounds - Venture **20%** - Series A **18%** - Seed **17%** - Series B **9%** - Pre-seed **9%** - Other **26%** ## What They Backed Sectors, last 12 months - AI **1,747** - Fintech **259** - Big Data & Analytics **195** - Healthcare **183** - Biotech **166** - Financial Services **152** ## Cheques by Quarter Led Joined 1,405 Q1 25 1,424 Q2 25 1,633 Q3 25 1,778 Q4 25 1,724 Q1 26 1,512 Q2 26 1,259 Q3 26 388 Q4 26 The last bar is the quarter still running. ## Lists Like This - [AI investors in North America 3,859](https://millionrounds.com/lists/ai-investors-in-north-america) - [AI investors in Europe 2,283](https://millionrounds.com/lists/ai-investors-in-europe) - [Fintech investors in North America 1,309](https://millionrounds.com/lists/fintech-investors-in-north-america) - [Big Data & Analytics investors in North America 1,094](https://millionrounds.com/lists/big-data-investors-in-north-america) - [AI investors in Asia 1,047](https://millionrounds.com/lists/ai-investors-in-asia) - [Biotech investors in North America 1,001](https://millionrounds.com/lists/biotech-investors-in-north-america) - [Energy investors in North America 864](https://millionrounds.com/lists/energy-investors-in-north-america) - [Robotics investors in North America 848](https://millionrounds.com/lists/robotics-investors-in-north-america) - [Construction investors in North America 791](https://millionrounds.com/lists/construction-investors-in-north-america) [All investor lists *→*](https://millionrounds.com/lists) ## Quick answers about open Source investors in North America ### Who are the most active open Source investors in North America? By cheques observed, the most active are Y Combinator, 500 Global, Sequoia Capital, Andreessen Horowitz and New Enterprise Associates. ### How many open Source investors in North America are there? 136 are on record. 90% made an investment in the last 12 months and 69% have led a round. ### Which stages do open Source investors in North America back? Of the rounds with a named stage in the last 12 months, mostly Series A (25%) and Seed (24%). ### How big are the rounds open Source investors in North America join? The typical (median) round among the leading investors here is $27M. ### Which sectors do open Source investors in North America back most? In the last 12 months, mostly AI, Fintech and Big Data & Analytics. ### Which open Source investors in North America lead the most rounds? Andreessen Horowitz (114 led), Accel (103 led) and General Catalyst (97 led). ### Where are open Source investors in North America based? Most of the leading investors here are based in the United States (24 of the top 25); the rest in the United Kingdom. ### What have open Source investors in North America 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](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)