Carbon13 is delighted to share the eight latest ventures in the Carbon13 stable, through our first fund with SyndicateRoom. There’s high potential solutions across the built environment, law, automotive circularity, methane monitoring, biopolymers, and renewable energy, with a 5/8 split on IP-led/deeptech ventures versus AI/software led platforms.

The €10 million milestone

Carbon13 has now hit the milestone of €10 million deployed into 84 ventures. This wealth of experience and portfolio has given us a unique insight into the frontline of climatetech in 2025.

What’s clear from the quantity and quality of these eight ventures is that climatetech is very much a magnet for top founders in the UK in 2025, for those drawn to the ambitions of building next generation hardware, AI or disrupting global markets. But, they also show that the sector is evolving in view of the VC headwinds this year – we share more comment on this below from our CEO Nicky Dee.

Aspiring climate founders, applications open for our next cohorts soon, explore our programmes.

For investors who want to learn more about our ventures or opportunities, reach out to us via this page.

But first, meet Cohort 7’s ventures:

Their mission: transform millions of tonnes of food waste into materials that serve people and the planet.

Demeter Bio’s flagship product, MelioShield, is a next-generation biopolymer derived from black soldier flies, a high-performance alternative to synthetic materials across cosmetics, healthcare, packaging, and biotech industries.

How to help: engaging with potential customers across cosmetics, pharma, and biotech

Their mission: transform millions of tonnes of food waste into materials that serve people and the planet.

Demeter Bio’s flagship product, MelioShield, is a next-generation biopolymer derived from black soldier flies, a high-performance alternative to synthetic materials across cosmetics, healthcare, packaging, and biotech industries.

How to help: engaging with potential customers across cosmetics, pharma, and biotech

Their mission: wave power without costing the earth – a £97billion industry by 2030.

Fetch Energy has a breakthrough design for wave power generators for the maritime industry, to deliver wave power reliably and cost competitively, without reliance on grid infrastructure.

How to help: Fetch are looking to speak to potential customers in the maritime and offshore industries

Their mission: decarbonise a million homes per year

Greenflip sources and analyses properties with high retrofit potential, providing instant investment analysis to capitalise on the zero energy bill premium.

How to help: they are looking for pilot investors who want to create portfolios of 1-10 zero bill homes through Greenflip’s platform

Their mission: decarbonise a million homes per year

Greenflip sources and analyses properties with high retrofit potential, providing instant investment analysis to capitalise on the zero energy bill premium.

How to help: they are looking for pilot investors who want to create portfolios of 1-10 zero bill homes through Greenflip’s platform

Their mission: Target ~1Gt/year of CO2 reduction through driving systemic change in corporate responsibility and climate justice.

Jupiter Lex addresses the lack of corporate accountability for climate harm by empowering legal professionals to seek justice more efficiently with AI-driven ESG litigation solutions.

How to help: Seeking legal professionals interested in ESG, angels, and software engineers.

Their mission: The circular economy in the Automotive Industry

Loop52 connect End of Life Vehicle (ELV) processors, Plastic Recyclers and OEMs to enable a traceable circular economy for Automotive Plastics.

How to help: In discussions with ELV processors and stakeholders in the automative industry.

Their mission: The circular economy in the Automotive Industry

Loop52 connect End of Life Vehicle (ELV) processors, Plastic Recyclers and OEMs to enable a traceable circular economy for Automotive Plastics.

How to help: In discussions with ELV processors and stakeholders in the automative industry.

Their mission: liberate renewables from fossil fuel backups

Orchid Solar’s technology is a novel combination of high-temperature solar mirrors, developed from recent Oxford University research, and their unique low-cost heat storage. It enables remote mining operations to replace diesel generators with clean, reliable power

How to help: seeking mining companies looking for reliable energy alternatives

Their mission: prevent 30 Mt CO2e of renewable methane from leaking into the atmosphere

Lambda Quantech provides low-cost IoT sensors and an AI-driven analytics platform for real-time monitoring and quantification of fugitive methane emissions at biogas plants.

How to help: seeking investors with a strong interest in the renewable gases industry and advisors who are passionate about rapid methane reduction

Their mission: prevent 30 Mt CO2e of renewable methane from leaking into the atmosphere

Lambda Quantech provides low-cost IoT sensors and an AI-driven analytics platform for real-time monitoring and quantification of fugitive methane emissions at biogas plants.

How to help: seeking investors with a strong interest in the renewable gases industry and advisors who are passionate about rapid methane reduction

Their mission: decarbonise air conditioning – 10% of the world’s annual electricity use

Temperate is building next generation, sustainable air cooling technology that keeps you cool at a fraction of the running cost, by beaming heat into outer space.

How to help: Working on first customer installations

A deeper look at the ventures and their teams

We’ll be sharing more insights into the teams in the coming weeks (subscribers to our community newsletter will be the first to receive this) but for now, you can read more on the ventures in our Lookbook.

Dive into the data

These eight ventures bring together diverse founders across a breadth of technologies and while we’ve got to know them as individuals after working with them closely for months, here’s some data of them as a cohort:

• 24% of the founders have PhDs
• 50% of the founders are serial founders
• 13 years – the average years of experience of each founder
• 4 out of 8 teams have at least one female founder

Climatetech in 2025 – comment from Nicky Dee

“The conversation in 2025 has been on where climatetech goes from here, what is its future, do we even call it climatetech? Well, “climatetech” has always been a horizontal not a vertical, and that horizontal is still evolving as the world’s approach to Net Zero evolves.

I would say to founders, investors and innovators alike, when you look at climatetech, you’re really looking at deeply committed founders across every sector, and there’s some obviously green plays like energy or emissions tracking – but they also include healthcare and law. Yes, a legal AI startup can be climatetech.”

Nicky Dee, CEO and Co-founder, Carbon13.

About Carbon13

Carbon13 is the Venture Builder for the Climate Emergency, creating scalable ventures that protect Earth’s vital systems. Born from the Cambridge ecosystem of innovation and expanded to Germany, our programmes have become a magnet for both world class founders to address the world’s most urgent climate challenges on a global scale.

Carbon13’s talent-first approach prioritises team building and cohesion, and a value proposition that can deliver a VC-backable and commercially scalable venture, but with a credible potential to reduce CO2e emissions by 10 million tonnes annually when at scale.

This Venture Builder approach means that Carbon13 is able to make investments into world class teams at an earlier stage than other pre-seed investors, derisking the process through close collaboration with the teams and a sector agnostic approach which delivers a diversified portfolio.

Notable Carbon13 startups include Nium, MatNex, Biozeroc, Kita, Differential Bio, Ki Hydrogen, Preoptima and Optimise AI.

Our startups have secured follow-on investment from the likes of SOSV, DCVC, Ada Ventures, Pale Blue Dot, High Tech Grunderfond, Cambridge Enterprise, Counteract, Planet A and AgFunder.

• £38 million – Carbon13 companies have gone on to raise up-rounds totalling more than £38m.
• EUR 10 million – total Carbon13 has invested into startups since 2021
• 84 invested startups since 2021
• 500 million tonnes – Carbon13’s portfolio is collectively working towards a decarbonisation potential at scale of 500 million tonnes per year.
• +10% of the Carbon13 portfolio is Earthshot nominated, including Kita, Samudra Oceans, Forge Minerals, and Nium.

About Syndicate Room

SyndicateRoom emphasises data analysis in its fund building and the importance of diverse portfolios to optimise growth potential. Its Access EIS Fund builds large portfolios by co-investing with a carefully vetted selection of the UK’s most successful angels, and gives investors access to investment opportunities in some of the UK’s most promising companies on exactly the same terms as their angel co-investors. 

Since 2017 SyndicateRoom’s funds have made more than 360 investments into EIS and SEIS-eligible startups, investing alongside institutions including British Business Investments. More recently, it has begun operating joint funds with strategic partners, including Carbon13, to offer its investors further diversification into EIS and SEIS-qualifying companies in specific high-growth sectors. To find out more about our funds and portfolio, visit us at https://www.syndicateroom.com/.