# Open Source lead investors (2026 list)

> 37 open Source lead investors, 97% active in the last 12 months. Led by Sequoia Capital, Andreessen Horowitz, SV Angel. Ranked by what they funded.

Source: https://millionrounds.com/lists/open-source-lead-investors (Millionrounds; every figure on the page links to its filing or article)

[Investor Lists](https://millionrounds.com/lists)

# Open Source lead investors

Updated 7 November 2026

Firms we have watched lead a round raised by an open Source company in the last two years. Leading is rarer than taking part, and it is the role a founder most needs filled.

[See all 37 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fopen-source-lead-investors)The top 25

**37** investors on the list No change this week

**1,465** cheques in 12 months *+12%* against the market

**$27M** median round they joined *+238%* against the market median

**97%** wrote a cheque in 12 months

**100%** have led a round

## The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (25)

- 1 [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) *Deploying now* VC firm · United States **2,099** **$35M** median round **Nov 2026** last seen
- 2 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) *Deploying now* VC firm · United States **1,661** **$27M** median round **Nov 2026** last seen
- 3 [SV Angel](https://millionrounds.com/fund/sv-angel) *Deploying now* VC firm · United States **1,349** **$18M** median round **Oct 2026** last seen
- 4 [Accel](https://millionrounds.com/fund/accel) *Deploying now* VC firm · United States **1,341** **$32M** median round **Nov 2026** last seen
- 5 [Intel Capital](https://millionrounds.com/fund/intel-capital) *Deploying now* Corporate VC · United States **1,123** **$22M** median round **Oct 2026** last seen
- 6 [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) *Deploying now* VC firm · United States **773** **$47M** median round **Nov 2026** last seen
- 7 [Insight Partners](https://millionrounds.com/fund/insight-venture-partners) *Deploying now* VC firm · United States **765** **$40M** median round **Oct 2026** last seen
- 8 [HSG](https://millionrounds.com/fund/hsg) *Deploying now* VC firm · Hong Kong SAR China **498** **$31M** median round **Oct 2026** last seen
- 9 [Peak XV](https://millionrounds.com/fund/peak-xv) *Deploying now* VC firm · United States **317** **$15M** median round **Nov 2026** last seen
- 10 [IVP](https://millionrounds.com/fund/ivp) *Deploying now* VC firm · United States **287** **$100M** median round **Oct 2026** last seen
- 11 [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) *Deploying now* Family office **240** **$50M** median round **Oct 2026** last seen
- 12 [Cota Capital](https://millionrounds.com/fund/cota-capital) *Deploying now* VC firm · United States **200** **$15M** median round **Jul 2026** last seen
- 13 [NFX](https://millionrounds.com/fund/nfx) *Deploying now* VC firm · United States **191** **$10M** median round **Sept 2026** last seen
- 14 [SignalFire](https://millionrounds.com/fund/signalfire) *Deploying now* VC firm · United States **188** **$16M** median round **Oct 2026** last seen
- 15 [Point Nine Capital](https://millionrounds.com/fund/point-nine-capital) *Deploying now* VC firm · Germany **184** **$8.6M** median round **Nov 2026** last seen
- 16 [Silverton Partners](https://millionrounds.com/fund/silverton-partners) *Deploying now* VC firm · United States **155** **$7M** median round **Oct 2026** last seen
- 17 [Robot Ventures](https://millionrounds.com/fund/robot-ventures) *Deploying now* VC firm · United States **135** **$6M** median round **Oct 2026** last seen
- 18 [Blockchain Capital](https://millionrounds.com/fund/blockchain-capital) *Deploying now* VC firm · United States **130** **$15M** median round **Nov 2026** last seen
- 19 [Emergence Capital](https://millionrounds.com/fund/emergence-capital) *Deploying now* VC firm · Senegal **101** **$30M** median round **Oct 2026** last seen
- 20 [Iris Capital](https://millionrounds.com/fund/iris) *Deploying now* VC firm · France **96** **$25M** median round **Oct 2026** last seen
- 21 [AVP](https://millionrounds.com/fund/avp-2) *Deploying now* Investment firm · United States **94** **$23M** median round **Oct 2026** last seen
- 22 [Basis Set Ventures](https://millionrounds.com/fund/basis-set-ventures) *Deploying now* VC firm · United States **93** **$13M** median round **Oct 2026** last seen
- 23 [Vista Equity Partners](https://millionrounds.com/fund/vista-equity-partners) *Deploying now* Private equity · United States **64** **$40M** median round **Oct 2026** last seen
- 24 [Aramco Ventures](https://millionrounds.com/fund/aramco-ventures) *Deploying now* Corporate VC · Saudi Arabia **60** **$27M** median round **Sept 2026** last seen
- 25 [Addition](https://millionrounds.com/fund/addition) *Deploying now* Private equity · United States **58** **$38M** median round **Sept 2026** last seen

**12 more on this list**

All 37 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-lead-investors)

## The Newest Cheques

Rounds this list's investors joined most recently

- **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 **[Uranium Digital](https://millionrounds.com/company/uranium-digital)** Series A · $17M *Led by* [Blockchain Capital](https://millionrounds.com/fund/blockchain-capital)
- **5** Nov **[CesiumAstro](https://millionrounds.com/company/cesiumastro)** Series D+ · $730M *With* [Airbus Ventures](https://millionrounds.com/fund/airbus-ventures)
- **5** Nov **[Zipline](https://millionrounds.com/company/zipline)** Growth · $1.5B *With* [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management)
- **4** Nov **[Phaze Inc.](https://millionrounds.com/company/phaze-inc)** Seed · $8.8M *Led by* [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz)

## Stages This Year

1,196 rounds

- Series A **17%**
- Seed **16%**
- Venture **15%**
- Series B **13%**
- Series C **9%**
- Other **30%**

## What They Backed

Sectors, last 12 months

- AI **647**
- Fintech **110**
- Big Data & Analytics **78**
- Cybersecurity **71**
- Robotics **61**
- Healthcare **60**

## Cheques by Quarter

Led Joined

303 Q1 25

302 Q2 25

410 Q3 25

431 Q4 25

452 Q1 26

369 Q2 26

353 Q3 26

128 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [AI lead investors 1,723](https://millionrounds.com/lists/ai-lead-investors)
- [Lead investors in United States 1,370](https://millionrounds.com/lists/lead-investors-in-united-states)
- [Seed lead investors 1,091](https://millionrounds.com/lists/seed-lead-investors)
- [Series A lead investors 920](https://millionrounds.com/lists/series-a-lead-investors)
- [Fintech lead investors 763](https://millionrounds.com/lists/fintech-lead-investors)
- [Series B lead investors 579](https://millionrounds.com/lists/series-b-lead-investors)
- [Growth lead investors 555](https://millionrounds.com/lists/growth-lead-investors)
- [Robotics lead investors 397](https://millionrounds.com/lists/robotics-lead-investors)
- [Pre-seed lead investors 396](https://millionrounds.com/lists/pre-seed-lead-investors)

[All investor lists *→*](https://millionrounds.com/lists)

## Quick answers about open Source lead investors

### Who are the most active open Source lead investors?

By cheques observed, the most active are Sequoia Capital, Andreessen Horowitz, SV Angel, Accel and Intel Capital.

### How many open Source lead investors are there?

37 are on record. 97% made an investment in the last 12 months and 100% have led a round.

### Which stages do open Source lead investors back?

Of the rounds with a named stage in the last 12 months, mostly Series A (23%) and Seed (22%).

### How big are the rounds open Source lead investors join?

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

### Which sectors do open Source lead investors back most?

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

### Which open Source lead investors lead the most rounds?

Andreessen Horowitz (114 led), Accel (103 led) and Sequoia Capital (91 led).

### Where are open Source lead investors based?

Among the most active, most are based in the United States (19), Hong Kong SAR China (1) and Germany (1).

### What have open Source lead investors invested in recently?

Recent rounds include Thinking Machines Lab (Other, Nov 2026, with Accel), Harbinger (Series D+, Nov 2026, with Tiger Global Management) and Uranium Digital (Series A, Nov 2026, with Blockchain Capital).

Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)