The Venture Accelerator

The super advisor for ambitious climate startups

Applications are open now to start 4th May 2026

Apply here

Image Reaforma are repurposing construction and manufacturing waste into low carbon building materials

The Carbon13 Venture Accelerator supports and invests in founders working on the solutions to the climate emergency.

Think of this accelerator as your superadvisor. We work one on one with you to make your startup investable, scalable and high impact on the climate and Earth’s life support systems.

You’ll also have the chance to pitch for investment from Carbon13 for €150 000 – 250 000.

This is doing, not talking.

We make

the beginning scalable the world class world changing the science the opportunity the climate emergency the mission

Application deadline - 27th March

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“The insights from the Venture Launchpad were truly eye-opening, and now our financial modelling, growth, and go-to market plan are all aligned with our carbon targets.”

Shruti Grover
CEO and Cofounder of Pattern Project

“It’s the bespoke nature of the support, you’re tapping into specialist advice every week… the quality of content is just better.”

Chloe Donovan
MD, Natural Building Systems

“Going through the Carbon13 programme where Reaforma was incepted was the catalyst to jumping into the deep end. I cannot state it any clearer that the Carbon13 Venture Launchpad is THE place to go if you’re looking to take a leap into the world of climatetech.”

Munraj Sembhi
CEO and Cofounder of Reaforma

Who should apply to the Venture Accelerator

The Venture Accelerator supports founding teams of early stage software or deeptech/science-based startups which are addressing challenges to Earth's Life Support Systems including climate, decarbonisation, water, biodiversity, adaptation and resilience etc.

To be eligible for the Accelerator, your startup should:

  • Have two or more founders.
  • Be registered in the UK or EU
  • Be intending to raise a round in the next 12 months of €~1-3 million
  • TRL 6-7 preferred

What we look for in a startup team differs depending on whether it's a software or a deeptech/science-based venture. Likewise, our support adapts to the very different challenges faced by those founders.

How we select and support software & science-based ventures

The strongest ecosystem for climate tech is now your personal brains trust

Our ecosystem is one of the strongest and richest support systems in climate tech entrepreneurship today. Think of us as one giant brains trust focused on entrepreneurship and carbon reduction.

Domain Experts

over 400 with sector specific, entrepreneurial, and technical expertise, mission driven for the climate

Corporate partners

Our network of corporate partners, eager to work with startups

Entrepreneurs in Residence

who embed into your startup. All are successful founders themselves.

Carbon experts

who guide and push you to maximise your carbon impact, then quantify it for a Carbon Case.

Investor partners

support you on your investment readiness and your long term fundraising strategy.

At a glance

Across two Phases, founders will rapidly develop their venture.

01 - The application process
  • We assess applications on a rolling basis. There is an advantage in applying as early as possible.
  • The final deadline for applications will be the 27th March.
  • Applications are assessed on a rolling basis so we strongly recommend you do not wait for the deadline but apply as soon as you are ready.
  • The first step is a written application form. This will also require you to film a two minute video.
  • The second stage consists of two interviews with the Carbon13 team to understand your venture and team in more detail.
  • For successful candidates, we will also have a due diligence process to confirm our offer to you.
02 - The Venture Accelerator structure

The next cohort starts 4th May.

There are two Phases to the programme.

Phase 1

  • A 7 week sprint focused on your pitch for Carbon13 investment.
  • The programme is completely remote, built around one on one deepdives with your Entrepreneur In Residence.
  • Focuses include your go-to-market, tech roadmap, traction, investment readiness and carbon case.
  • Startups which begin the programme give Carbon13 1% in options, recognising our role as advisors.

Phase 2

The ventures Carbon13 invests in proceed to Phase 2 - the Growth Phase.

  • 12 month phase focused on supporting you to raise 1-3 million euros within 12 months.
  • Again support is highly bespoke and one on one. Focused on hitting milestones and investor conversations.
  • In-person pitch opportunity at our Showcases, to an audience of invited investors and partners.
  • For ventures that do not receive our investment, we will still provide some lighter touch support.
03 - The key benefits
  • You become part of Carbon13's ecosystem, one of the leading investors in early stage climatetech in Europe
  • A highly bespoke approach where you work with us one on one to tackle your venture's specific challenges
  • You'll build your "Carbon Pitch" and carbon case, to understand how to strategise for impact and lock in to your business model a potential 10 million tonnes of CO2e emissions reduction per year
  • 1-1 weekly deep dives with Entrepreneurs-In-Residence (all successful founders)
  • Milestones on product/market fit, go-to-market, and team and culture.
  • Investment Pitch and strategy for raising the next round
  • Opportunity for pre-seed investment from Carbon13 of €150 000 - €250 000. This is done through a SAFE and is designed to supply you with the capital to go on to raise the follow on funding of €1-3 million. This SAFE targets a 4-7% equity stake. There may be an opportunity for follow on funding from Carbon13.
  • For ventures which win our investment, we support you to raise your next round through access to our investor community and invitation to Climate Innovation Showcase to partners and investors
Puja Balachander Amy Ma Danu Robotics Venture Launchpad 1

Got questions?

Book a short call with Carbon13’s Sara Jones. She can answer questions on eligibility, how to make a good application, how the accelerator would work for your venture and what you could expect to achieve.

Book a call

News, raises & milestones

Learn more about Carbon13’s progress and community. Here we share fundraising news from our ventures, collaborations with our partners, and our own news, opinion, and milestones.

Sign up for the Carbon13 Newsletter
Berlin Climate Innovation Showcase Day

Berlin Climate Innovation Showcase Day

Mar 2, 2026

Last Thursday, we brought together Berlin Cohort 4 and Cambridge Cohort 8 at Google’s Berlin headquarters — nine teams, two cohorts, one shared mission: building ventures that move the needle on net zero.

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