Undaunted’s flagship accelerator programme
The Greenhouse
Support and how to apply
Q&A sessions
While applications are open we run a series of informal Q&A webinars to give you the opportunity to learn more about the programme, ask questions, and meet the team. These will take place during July and August 2025.
Pitch Pod
The Greenhouse team runs monthly pitch feedback sessions for Climate Tech Founders, a great opportunity to get some radically honest feedback on your pitch. Register for a slot below.
Info Pack & FAQs
Download our Info Pack to explore everything The Greenhouse has to offer — from funding and facilities to timelines, eligibility, and what to expect throughout the programme. Your go-to guide for joining London’s leading climate accelerator.
Application form
To apply for Cohort 9 complete the application form linked below.
The deadline to apply is 31 August 2025. The form needs to be completed in one go.
What are we looking for?
Inspiring and intelligent solutions
We support a broad range of technical solutions that cut across many industries such as (but not limited to): agriculture, fashion, the built environment, transport, energy and greenhouse gas removal (including carbon dioxide removal) and financial innovation.
Passion and commitment
We’re proud of the innovation community that we’re building, and it’s really important to us that the startups on The Greenhouse fully engage with us and our programmes – from application and selection, through the programme, to graduation and beyond.
Diversity
We recognise that we have an under-representation of women, Black and other minority ethnic groups, and disabled persons in our startup portfolios, and encourage more applications from people who identify as part of these groups.
The application process
Application form
Teams will be assessed on the basis of their application forms and submitted pitch decks, and scored against the following criteria and the quality of their application:
- Climate impact / relevance
- Strength and uniqueness of innovation / IP
- Potential to scale / Likelihood of market success
- Team capability
- Overall suitability for The Greenhouse
We will also assess each application on the basis of how much the team is likely to benefit from our support. Scroll to the top of this page to access application support and the link to apply.
The Bootcamp
The two-day Bootcamp is focused on identifying and testing teams’ critical business assumptions via coaching, peer-reviews, and presentations. It gives us an opportunity to get to know teams better than we would in a traditional interview process, whilst providing them with an opportunity to learn and network. We expect the startup founder(s) to attend the Bootcamp in-person. We do not normally conduct interviews as part of the Bootcamp selection process, though in certain circumstances we may choose to do so.
The final selection of up to 15 startups for The Greenhouse will be made following completion of the Bootcamp.
Selection for The Greenhouse
The selection for The Greenhouse will be made based on the startup’s application form, their interactions and engagement at Bootcamp and the outputs from the Bootcamp process. Offers will be contingent on a fully engaged and committed approach to The Greenhouse, which will need to be maintained throughout the programme in order to remain a participant.
While we do not normally conduct interviews as part of the selection process, in certain circumstances we may choose to do so.
The selection panel is formed by Alyssa Gilbert, Maiko Schaffrath and Stefanie Mulder from the Undaunted. We generally also involve others from the British cleantech ecosystem.
Eligibility criteria
If you are not sure of your eligibility or have questions, please email us.
While we may make exceptions to the eligibility criteria listed here, this is rare and would be considered on a case by case basis.
The startup must be a legal UK entity, or register as a UK entity immediately upon selection
The Greenhouse is open to UK-registered companies. You must be a UK-based team, with your headquarters registered in the UK (or be willing to register in the UK upon selection). Founders don’t need to be based in London – but participants need to be able to attend in-person coaching sessions, workshops and other required activities in London, primarily at Scale Space in the White City Innovation District, and the The Royal Institution in Mayfair.
In most cases, we expect companies not to have raised significant commercial investment.
You must have the time to fully commit to one day per week of programming and follow-up implementation.
If your team has already participated in an ‘accelerator’, or similar innovation programme, you may still be eligible for The Greenhouse. However, we ask that you think carefully as to whether you will benefit from the educational elements of the programme before applying.
Supported by
The Greenhouse programme is funded by HSBC UK, the Inflexion Foundation, the Centre for Greening Finance and Investment and CO2RE: the Greenhouse Gas Removal Hub. It is working in partnership with the Mayor of London.
We conduct thorough due diligence to ensure that our supporters and partners are committed to reducing their environmental impact. Whilst we are aware that HSBC currently finances a number of industries that significantly contribute to greenhouse gas emissions, we know they have a strategy in place to help their customers reduce their emissions and to reduce their own – for more information please visit the HSBC Climate Strategy webpage.