# Pre-seed cleantech investors (2026 list)

> 92 pre-seed cleantech investors, 85% active in the last 12 months. Led by Y Combinator, Techstars, National Science Foundation. Ranked by what they funded.

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

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

# Pre-seed cleantech investors

Updated 7 November 2026

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

[See all 92 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fpre-seed-cleantech-investors)The top 25

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

**3,032** cheques in 12 months *-20%* against the market

**$3M** median round they joined *-62%* against the market median

**85%** wrote a cheque in 12 months

**47%** 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 [Techstars](https://millionrounds.com/fund/techstars) *Deploying now* VC firm · United States **2,989** **$1.2M** median round **Nov 2026** last seen
- 3 [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) *Deploying now* Government · United States **1,869** **$926K** median round **Sept 2026** last seen
- 4 [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
- 5 [Bpifrance](https://millionrounds.com/fund/bpifrance) *Deploying now* Government · France **1,151** **$4.5M** median round **Oct 2026** last seen
- 6 [EIC Accelerator](https://millionrounds.com/fund/eic-accelerator) *Deploying now* Government · European Union **875** **$4.3M** median round **Oct 2026** last seen
- 7 [Antler](https://millionrounds.com/fund/antler) *Deploying now* VC firm · United Kingdom **729** **$1M** median round **Nov 2026** last seen
- 8 [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) *Deploying now* Government · United States **453** **$2M** median round **Sept 2026** last seen
- 9 [SFC Capital](https://millionrounds.com/fund/sfc-capital) *Deploying now* Angel network · United Kingdom **379** **$431K** median round **Nov 2026** last seen
- 10 [K Fund](https://millionrounds.com/fund/kfund) *Deploying now* VC firm · Spain **340** **$3M** median round **Oct 2026** last seen
- 11 [Precursor Ventures](https://millionrounds.com/fund/precursor-ventures) *Deploying now* VC firm · United States **261** **$4M** median round **Oct 2026** last seen
- 12 [Scottish Enterprise](https://millionrounds.com/fund/scottish-enterprise) *Deploying now* Government · United Kingdom **256** **$2.1M** median round **Nov 2026** last seen
- 13 [Artesian VC](https://millionrounds.com/fund/artesian) *Deploying now* Asset manager · Australia **201** **$2M** median round **Oct 2026** last seen
- 14 [Ascension](https://millionrounds.com/fund/ascension) *Deploying now* VC firm · United Kingdom **190** **$3.4M** median round **Oct 2026** last seen
- 15 [Inflection Point Ventures](https://millionrounds.com/fund/inflection-point-ventures) *Deploying now* VC firm · United States **181** **$1M** median round **Oct 2026** last seen
- 16 [Innosuisse](https://millionrounds.com/fund/innosuisse) *Deploying now* Government · Switzerland **144** **$1.9M** median round **Aug 2026** last seen
- 17 [AGORANOV](https://millionrounds.com/fund/agoranov) *Deploying now* Accelerator · France **138** **$3M** median round **Jul 2026** last seen
- 18 [Mana Ventures](https://millionrounds.com/fund/mana-ventures) *Deploying now* VC firm · United States **137** **$6.2M** median round **Nov 2026** last seen
- 19 [N1](https://millionrounds.com/fund/n1) *Deploying now* VC firm · Luxembourg **134** **$1.4M** median round **Sept 2026** last seen
- 20 [Haatch](https://millionrounds.com/fund/haatch) *Deploying now* VC firm · United Kingdom **126** **$1.5M** median round **Nov 2026** last seen
- 21 [Investible](https://millionrounds.com/fund/investible) *Deploying now* VC firm · Australia **123** **$2.4M** median round **Aug 2026** last seen
- 22 [Innovacorp](https://millionrounds.com/fund/innovacorp) *Deploying now* VC firm · Czechia **115** **$1.1M** median round **Sept 2026** last seen
- 23 [Oxford Science Enterprises](https://millionrounds.com/fund/oxford-science-enterprises) *Deploying now* VC firm · United Kingdom **108** **$11M** median round **Nov 2026** last seen
- 24 [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) *Deploying now* Corporate VC · United Kingdom **105** **$6.3M** median round **Nov 2026** last seen
- 25 [Oriza Holdings](https://millionrounds.com/fund/oriza-holdings) *Deploying now* VC firm · China **101** **$14M** median round **Oct 2026** last seen

**67 more on this list**

All 92 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%2Fpre-seed-cleantech-investors)

## The Newest Cheques

Rounds this list's investors joined most recently

- **6** Nov **[Water Ledger Global](https://millionrounds.com/company/water-ledger-global)** Other *With* [Launch Africa](https://millionrounds.com/fund/launch-africa-ventures)
- **5** Nov **[T-Therapeutics](https://millionrounds.com/company/t-therapeutics)** Series B · $133M *Led by* [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund)
- **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)
- **5** Nov **[Alethio Therapeutics](https://millionrounds.com/company/alethio-therapeutics)** Series A · $90M *With* [Oxford Science Enterprises](https://millionrounds.com/fund/oxford-science-enterprises)
- **5** Nov **[Nayara](https://millionrounds.com/company/nayara)** Pre-seed · $522K *Led by* [SFC Capital](https://millionrounds.com/fund/sfc-capital)
- **5** Nov **[RadianX](https://millionrounds.com/company/radianx)** Seed · $9M *With* [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund)

## Stages This Year

2,714 rounds

- Venture **23%**
- Seed **21%**
- Pre-seed **17%**
- Series A **14%**
- Grant **7%**
- Other **18%**

## What They Backed

Sectors, last 12 months

- AI **997**
- Biotech **221**
- Healthcare **172**
- Big Data & Analytics **138**
- Energy **123**
- Fintech **112**

## Cheques by Quarter

Led Joined

1,024 Q1 25

945 Q2 25

1,061 Q3 25

1,028 Q4 25

970 Q1 26

857 Q2 26

697 Q3 26

128 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [Seed AI investors 2,922](https://millionrounds.com/lists/seed-ai-investors)
- [Series A AI investors 2,490](https://millionrounds.com/lists/series-a-ai-investors)
- [Series B AI investors 1,557](https://millionrounds.com/lists/series-b-ai-investors)
- [Pre-seed AI investors 1,286](https://millionrounds.com/lists/pre-seed-ai-investors)
- [Growth AI investors 1,186](https://millionrounds.com/lists/growth-ai-investors)
- [Series A fintech investors 950](https://millionrounds.com/lists/series-a-fintech-investors)
- [Series C AI investors 930](https://millionrounds.com/lists/series-c-ai-investors)
- [Seed fintech investors 925](https://millionrounds.com/lists/seed-fintech-investors)
- [Series A biotech investors 650](https://millionrounds.com/lists/series-a-biotech-investors)

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

## Reading for founders in climate and energy

- Taming the Sun: Innovations to Harness Solar Energy and Power the Planet Varun Sivaram · 2018 4.06 from 510 ratings on Goodreads Climate and energy Innovation About the book How solar could spark a clean-energy transition through transformative innovation--creative financing, revolutionary technologies, and flexible energy systems. Solar energy, once a niche application for a limited market, has become the cheapest and fastest-growing power… On AmazonListen on Audible
- Race for Tomorrow: Survival, Innovation and Profit on the Front Lines of the Climate Crisis Simon Mundy · 2022 4.22 from 207 ratings on Goodreads Climate and energy Innovation Company building About the book In this extraordinary journey through twenty-six countries, Simon Mundy meets the people on the front lines of the climate crisis, showing how the struggle to respond is already reshaping the modern world – shattering communities, shaking up global business, and propelling a… On AmazonListen on Audible
- The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age David S. Abraham · 2015 4.06 from 264 ratings on Goodreads Climate and energy Company building About the book Our future hinges on a set of rare metals that few of us have even heard of. In this eye-opening book, a natural resource strategist reveals the critical importance of these transformative elements to our technological lifestyle and the consequences of our reliance upon them,… On AmazonListen on Audible
- Scale: The Universal Laws of Growth, Innovation, Sustainability, and the Pace of Life in Organisms, Cities, Economies, and Companies Geoffrey B. West · 2017 4.11 from 5,764 ratings on Goodreads Climate and energy Company building Innovation About the book The former head of the Sante Fe Institute, visionary physicist Geoffrey West is a pioneer in the field of complexity science, the science of emergent systems and networks. The term “complexity” can be misleading, however, because what makes West’s discoveries so beautiful is… On AmazonListen on Audible

More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list?role=founder&industry=climate&stage=idea).

As an Amazon Associate we earn from qualifying purchases.

## Quick answers about pre-seed cleantech investors

### Who are the most active pre-seed cleantech investors?

By cheques observed, the most active are Y Combinator, Techstars, National Science Foundation, Alumni Ventures and Bpifrance.

### How many pre-seed cleantech investors are there?

92 are on record. 85% made an investment in the last 12 months and 47% have led a round.

### Which stages do pre-seed cleantech investors back?

Of the rounds with a named stage in the last 12 months, mostly Seed (29%) and Pre-seed (24%).

### How big are the rounds pre-seed cleantech investors join?

The typical (median) round among the leading investors here is $2.4M.

### Which sectors do pre-seed cleantech investors back most?

In the last 12 months, mostly AI, Biotech and Healthcare.

### Which pre-seed cleantech investors lead the most rounds?

Y Combinator (11 led), Bpifrance (11 led) and EIC Accelerator (9 led).

### Where are pre-seed cleantech investors based?

Among the most active, most are based in the United States (8), the United Kingdom (7) and France (2).

### What have pre-seed cleantech investors invested in recently?

Recent rounds include Water Ledger Global (Other, Nov 2026, with Launch Africa), T-Therapeutics (Series B, Nov 2026, with British Business Bank) and firmly (Series A, Nov 2026, with Alumni Ventures).

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