Investors / United Kingdom / Carbon13
Carbon13
Accelerator · Cambridge, United Kingdom · Europe
Carbon13 runs venture builder and accelerator programmes that help founders create and grow climate-tech startups. It supports founders through co-founder matching, expert guidance, and access to finance, and invests in the ventures built through its programmes.
Invests inIndustrial & ManufacturingAI & Machine Learning
In its own wordsclimate techcarbon reductionventure builderacceleratordeep techsustainability
Your fit with Carbon13
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsCarbon13 lists 68 checked portfolio companies on its own site and is named in 5 funding rounds, 3 of them as lead. Its most frequent entry is Seed, 60% of the companies with a known first round. Its largest themes are Industrial & Manufacturing (20%), AI & Machine Learning (18%) and Education (14%). 68% of its companies are based in United Kingdom. It invests most often alongside OnePlanetCapital, The Conduit Connect and AgFunder.
Counts come from funding rounds that name Carbon13, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not Carbon13's whole history. Rounds on record name 5 companies; its own site lists 68. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 40% |
| Seed | 60% |
| Series A | 0% |
| Series B | 0% |
| Growth | 0% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 1 | 1 |
| '26 | 4 | 2 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 90th | 68 companies |
| Recent activity | 82th | 4 rounds in 12 months |
| Early stage | 100th | 100% of entries at pre-seed or seed |
| Evidence | 62th | 4% of companies confirmed by a round |
| Sector focus | 17th | 20% in its largest sector |
| Reach | 88th | 7 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Industrial & Manufacturing | 20% | 7% |
| AI & Machine Learning | 18% | 18% |
| Education | 14% | 7% |
| Space & Defense | 10% | 3% |
| Fintech | 8% | 12% |
| Climate & Energy | 7% | 1% |
| Real Estate & Construction | 6% | 3% |
| Food & Agriculture | 3% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| OnePlanetCapital | 8 |
| The Conduit Connect | 3 |
| AgFunder | 2 |
| ET Capital | 2 |
| Imagine H2O | 2 |
| Ada Ventures | 1 |
| Adapt Nation Capital | 1 |
| Alante Capital | 1 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers68100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with OnePlanetCapital
Compare Carbon13 head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Carbon13| Date | Company | Stage |
|---|---|---|
| 1 Sept 2026 | Pre-Seed | |
| 27 Aug 2026 | Pre-Seed Led | |
| 18 Aug 2026 | Seed Led | |
| 19 May 2025 | Seed Led |
Round details for Carbon13
Amounts, full round histories and every co-investor in Carbon13's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
68 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| The company converts mixed, unsorted waste into a stable biomass intermediate that can be upgraded into high-value products. | Industrial & ManufacturingAI & Machine Learning | Portfolio page | ||
| Adia Thermal makes heat pumps work on the radiators you already have | Healthcare & BiotechIndustrial & Manufacturing | Portfolio page | ||
| Aed Energy develops and provides industrial heat solutions using high-temperature thermal batteries | Industrial & ManufacturingEducation | Portfolio page | ||
| Algaenic harvests materials | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Anzen provides an AI-native end-to-end system for the policy lifecycle in the insurance industry | FintechAI & Machine Learning | Portfolio page | ||
| Astracite develops next-generation battery materials that are sustainable, efficient, and built for the future of clean energy. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Auralytica makes a smart material that changes colour with the chemistry around it | Food & AgricultureIndustrial & Manufacturing | Portfolio page | ||
| BioNatural Solutions transforms organic waste into highly profitable and scalable bioinputs for agriculture through its LifecoPro platform. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Bluemethane controls methane in liquids through measurement, capture and prevention. | Industrial & ManufacturingClimate & Energy | Portfolio page | ||
| Carbon Cell is dedicated to providing a sustainable alternative to traditional polymer-based foams. | Space & DefenseAI & Machine Learning | Portfolio page | ||
| Circular11 transforms waste-bound plastic into low-carbon fencing, furniture, and landscaping products for the construction and estates sectors. | Consumer | Portfolio page | ||
| The company develops technology to capture SF6 gas leaking from substation equipment | EducationEducation | Portfolio page | ||
| Climingo helps evaluate and procure the best weather forecast provider for specific needs | Industrial & ManufacturingFintech | Aug 2026Pre-Seed | Page + round | |
| The company develops and produces sustainable composite materials with a focus on the build environment. | Consumer | Portfolio page | ||
| COOloop develops technology that turns captured CO₂ and renewable hydrogen into valuable fuels and chemicals, starting with ethanol. | Climate & EnergyIndustrial & Manufacturing | Portfolio page | ||
| CoolRun combines passive cooling technology, patented airflow systems and IoT monitoring to maintain exact temperatures for chilled and frozen goods. | Food & AgricultureSpace & Defense | Portfolio page | ||
| Deep Blue BioTech transforms CO₂ into high-value molecules using synthetic biology and the power of the ocean and cyanobacteria | Healthcare & Biotech | Portfolio page | ||
| Demeter Bio develops and engineers biomaterials and coatings as alternatives to persistent legacy coatings. | Industrial & ManufacturingSpace & Defense | May 2025Seed | Page + round | |
| Differential Bio works with clients to make microbial growth predictable, scalable, and cost-effective through robotic lab automation and AI-driven insights. | Healthcare & Biotech | Portfolio page | ||
| Elaniti provides decision-support tools for agricultural teams using proprietary AI models | AI & Machine LearningAI & Machine Learning | Portfolio page |
About this data
site last read 10 Nov 2026- Site
- carbonthirteen.com
- Last read
- 10 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 19 May 2025
- Companies checked
- 68
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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