Our portfolio

Our ventures

Twenty innovative carbon emissions-mitigating startups have been launched so far by Carbon13’s Venture Builder for the Climate Emergency.

Each venture that you see on this page has the potential to reduce CO₂e emissions by at least 10 million tonnes per annum. 

Cohort 2 – you can meet our founders and watch them showcase their ventures in-person at the Cambridge Union on the 24th May. Simply register for your ticket here.

Cohort 1

xtonnes is next generation carbon management platform empowering enterprises of any size to reduce emissions and start their journey to Net Zero.
Offgrid.Finance works with clean and productive-use technology vendors to provide financing to their SME customers in emerging markets.

Agreed Earth’s mission is to accelerate the adoption of regenerative farming practices to reduce global carbon emissions and improve the profitability of the farms themselves.

Materials Nexus is revolutionising how new low-carbon materials are discovered and developed using their AI platform.

Electric vehicles promise a future of clean mobility, but their supply chains are complex, opaque and far from clean. Infyos is building a future where every electric vehicle battery is sustainable.

Tierra Foods is a food company for the 21st Century. 

They are optimising the potential of highly nutritious, but under-used plants from the Central American rainforest into innovative, carbon-negative ingredients for B2B. 

PuriFire Labs is a circular waste technologies company. Their patented technology converts plastic and other municipal waste into value-added products such as animal feed and electricity with minimal upfront sorting.
Windfinity aims to become a world leader in wind energy by acquiring legacy (20-year-old) wind turbines and then operating and maintaining them for another 10+ years.

Cohort 2

BioZeroc are a biomaterials science company using biotechnology to create carbon-negative construction materials. 

Bluemethane is a technology company developing a breakthrough data platform and hardware solution to sense and capture methane emissions from water.


Croptimise is a network of computer vision enabled smart traps to track pests and combining this with state-of-the-art machine learning models to build accurate and actionable pest forecasts.  

Emeralga Biotech

Emeralga Biotech employs novel biotechnology to process microalgae grown from  wastewater from the food and beverage industry to  generate by-products like proteins, vitamins and nutrients.


foodloop upcycles byproducts from food manufacturing into sustainable plant-based ingredients for the alternative protein industry, expanding the ingredient landscape beyond the current range of virgin wheat, pea, and soy.

Insenti is a software company that helps companies decarbonise their supply chains by identifying the most effective nature-based insetting projects for carbon and biodiversity. 

Kita’s purpose is to be a new type of insurance company. Our vision is to be the world’s first “carbon insurer”, covering the risk that carbon sequestration solutions under deliver against their promised carbon removal targets (“carbon delivery risk”).

Lime Track’s low-friction digital B2B food waste management platform ensures that food waste is cost-effectively collected, tracked and processed, and that Scope 1 and Scope 3 emissions are reduced and accurately reported.


NorthStar Platform solves the intention-action gap for sustainable projects by eliminating the search problems and decision paralysis in discovering and executing small to medium sized sustainable projects. 


Paradigm sits at the intersection of art and philanthropy to create valuable digital assets with everlasting environmental impact. We exist to support the organisations making a positive impact on the planet.

Phoenix Carbon is a disruptive, composite recycling process that goes beyond the state of the art. Phoenix Carbon is the enabler for a composite circular economy across Aero, Auto, Marine and Leisure sectors.

Shanti is enabling safer urban life through smart data, helping people walk, cycle and use public transportation by providing safer routes. 

Carbon13’s mission is to use entrepreneurship to reduce emissions by at least 400m tonnes per annum. It was founded with a belief that diversity in entrepreneurial founders is an important part of bringing the “think different” mindsets and perspectives to the fore which can achieve the kinds of breakthroughs required by the Net Zero challenge. It is notable therefore that ten of the ventures are led by female CEOs and six have minority ethnic leaders (including four CEOs.)

Want to add to this list?

If you too want to become a founder of a high growth startup capable of reducing emissions by 10 million tonnes per year, then applications are now open for our fourth cohort which will begin in September 2022. 

Follow our startups' progress

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We’ll share regular updates on our Venture Builder cohorts, company news, community events, and resources on Net Zero entrepreneurship.
We’ll also share opportunities for how to get involved with the ventures generated by the Venture Builder.
If you’d like to learn more about investing in our ventures, you can learn more about the Carbon13 SEIS fund here.