# Solo angels backing Open Source (2026 list) > 10 solo angels backing Open Source, 40% active in the last 12 months. Led by 500 Global, Eric Yuan, Brian Balfour. Ranked by what they funded. Source: https://millionrounds.com/lists/solo-angels-open-source (Millionrounds; every figure on the page links to its filing or article) [Investor Lists](https://millionrounds.com/lists) # Solo angels backing Open Source Updated 7 November 2026 Solo angels we have observed in an open Source round in the last two years. [See all 10 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fsolo-angels-open-source)The top 10 **10** investors on the list No change this week **80** cheques in 12 months *-54%* against the market **$20M** median round they joined *+144%* against the market median **40%** wrote a cheque in 12 months **10%** have led a round ## The Top 10 Ordered by cheques observed, never by anything anyone paid for Deploying now (4) - 1 [500 Global](https://millionrounds.com/fund/500-startups) *Deploying now* Angel · United States **2,140** **$3.6M** median round **Oct 2026** last seen - 2 [Eric Yuan](https://millionrounds.com/fund/eric-yuan) *Deploying now* Angel · United States **7** **$19M** median round **Oct 2026** last seen - 3 [Brian Balfour](https://millionrounds.com/fund/brian-balfour) *Deploying now* Angel **4** **$28M** median round **Jun 2026** last seen - 4 [Lukas Biewald](https://millionrounds.com/fund/lukas-biewald) quiet Angel **2** **$20M** median round **Oct 2025** last seen - 5 [Paul Copplestone](https://millionrounds.com/fund/paul-copplestone) *Deploying now* Angel **2** **$13M** median round **Mar 2026** last seen - 6 [Xavier Buck](https://millionrounds.com/fund/xavier-buck) quiet Angel **2** **$8M** median round **Jan 2025** last seen - 7 [James Hawkins](https://millionrounds.com/fund/james-hawkins) quiet Angel **1** **$20M** median round **Oct 2025** last seen - 8 [Casey Ellis](https://millionrounds.com/fund/casey-ellis) quiet Angel **1** **$25M** median round **Nov 2025** last seen - 9 [Christophe Bianco](https://millionrounds.com/fund/christophe-bianco) quiet Angel **1** **$8M** median round **Jan 2025** last seen - 10 [Haroon Meer](https://millionrounds.com/fund/haroon-meer) quiet Angel **1** **$25M** median round **Nov 2025** last seen ## The Newest Cheques Rounds this list's investors joined most recently - **20** Oct **[Daytona](https://millionrounds.com/company/daytona)** Series B · $60M *With* [Eric Yuan](https://millionrounds.com/fund/eric-yuan) - **14** Oct **[Dapta](https://millionrounds.com/company/dapta)** Seed · $6M *With* [500 Global](https://millionrounds.com/fund/500-startups) - **28** Sept **[erad](https://millionrounds.com/company/erad)** Series A · $22M *With* [500 Global](https://millionrounds.com/fund/500-startups) - **16** Sept **[Scaffold](https://millionrounds.com/company/scaffold)** Seed · $15M *With* [500 Global](https://millionrounds.com/fund/500-startups) - **14** Sept **[BRKZ](https://millionrounds.com/company/brkz)** Series B · $31M *Led by* [500 Global](https://millionrounds.com/fund/500-startups) - **1** Sept **[ProducePay](https://millionrounds.com/company/producepay)** Venture · $140M *With* [500 Global](https://millionrounds.com/fund/500-startups) ## Stages This Year 80 rounds - Seed **28%** - Series A **16%** - Venture **14%** - Debt **10%** - Series B **9%** - Other **24%** ## What They Backed Sectors, last 12 months - AI **33** - Fintech **12** - Financial Services **7** - Big Data & Analytics **4** - B2B **4** - Construction **4** ## Cheques by Quarter Led Joined 51 Q1 25 39 Q2 25 43 Q3 25 44 Q4 25 34 Q1 26 23 Q2 26 12 Q3 26 2 Q4 26 The last bar is the quarter still running. ## Lists Like This - [VC firms backing AI 4,329](https://millionrounds.com/lists/vc-firms-ai) - [VC firms backing Fintech 1,856](https://millionrounds.com/lists/vc-firms-fintech) - [VC firms backing Big Data & Analytics 1,248](https://millionrounds.com/lists/vc-firms-big-data) - [VC firms backing Biotech 1,207](https://millionrounds.com/lists/vc-firms-biotech) - [VC firms backing Robotics 1,098](https://millionrounds.com/lists/vc-firms-robotics) - [VC firms backing Construction 1,025](https://millionrounds.com/lists/vc-firms-construction) - [VC firms backing Energy 998](https://millionrounds.com/lists/vc-firms-energy) - [PE firms backing AI 956](https://millionrounds.com/lists/pe-firms-ai) - [VC firms backing Cybersecurity 950](https://millionrounds.com/lists/vc-firms-cybersecurity) [All investor lists *→*](https://millionrounds.com/lists) ## Quick answers about solo angels backing Open Source ### Who are the most active solo angels backing Open Source? By cheques observed, the most active are 500 Global, Eric Yuan, Brian Balfour, Lukas Biewald and Paul Copplestone. ### How many solo angels backing Open Source are there? 10 are on record. 40% made an investment in the last 12 months and 10% have led a round. ### Which stages do solo angels backing Open Source back? Of the rounds with a named stage in the last 12 months, mostly Seed (35%) and Series A (21%). ### How big are the rounds solo angels backing Open Source join? The typical (median) round among the leading investors here is $20M. ### Which sectors do solo angels backing Open Source back most? In the last 12 months, mostly AI, Fintech and Financial Services. ### Where are solo angels backing Open Source based? Among the most active, most are based in the United States (2). ### What have solo angels backing Open Source invested in recently? Recent rounds include Daytona (Series B, Oct 2026, with Eric Yuan), Dapta (Seed, Oct 2026, with 500 Global) and erad (Series A, Sept 2026, with 500 Global). ### How is this list of solo angels backing Open Source 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](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)